{"id":21547,"date":"2026-07-18T09:29:47","date_gmt":"2026-07-18T09:29:47","guid":{"rendered":"https:\/\/zjaluminum-cnc.com\/blog\/conductivite-thermique-de-laluminium-valeurs-alliages-et-utilisation-en-conception\/"},"modified":"2026-07-23T02:21:39","modified_gmt":"2026-07-23T02:21:39","slug":"conductivite-thermique-de-laluminium-valeurs-alliages-et-utilisation-en-conception","status":"publish","type":"post","link":"https:\/\/zjaluminum-cnc.com\/fr\/blog\/conductivite-thermique-de-laluminium-valeurs-alliages-et-utilisation-en-conception\/","title":{"rendered":"Conductivit\u00e9 thermique de l\u2019aluminium : valeurs, alliages et utilisation en conception"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"21547\" class=\"elementor elementor-21547 elementor-21009\" data-elementor-post-type=\"post\">\n\t\t\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-e80c8cc e-flex e-con-boxed e-con e-parent\" data-id=\"e80c8cc\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-84cbed2 elementor-widget elementor-widget-text-editor\" data-id=\"84cbed2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>L\u2019aluminium pur pr\u00e9sente une conductivit\u00e9 thermique d\u2019environ <strong>235\u2013237 W\/m\u00b7K pr\u00e8s de la temp\u00e9rature ambiante<\/strong>, soit approximativement <strong>136\u2013137 Btu\/(h\u00b7ft\u00b7\u00b0F)<\/strong>.<\/p><p>La valeur de <strong>237 W\/m\u00b7K<\/strong>, souvent cit\u00e9e, s\u2019applique \u00e0 l\u2019aluminium pur. La plupart des pi\u00e8ces techniques utilisent des alliages dont la conductivit\u00e9 est plus faible. Par exemple, le 6061-T6 est couramment donn\u00e9 \u00e0 environ <strong>167 W\/m\u00b7K \u00e0 20 \u00b0C<\/strong>.<\/p><p>La valeur de calcul correcte d\u00e9pend de l\u2019alliage, de l\u2019\u00e9tat m\u00e9tallurgique, de la temp\u00e9rature et de la forme du produit.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6a6b283 elementor-widget elementor-widget-text-editor\" data-id=\"6a6b283\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Conductivit\u00e9 thermique de l\u2019aluminium par alliage<\/h2><p>Le tableau pr\u00e9sente des valeurs repr\u00e9sentatives \u00e0 temp\u00e9rature ambiante. Il s\u2019agit de valeurs de r\u00e9f\u00e9rence et non de limites garanties du mat\u00e9riau.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d97485f elementor-widget elementor-widget-text-editor\" data-id=\"d97485f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<table class=\"zj-table\"><colgroup> <col style=\"width: 16%;\" \/> <col style=\"width: 22%;\" \/> <col style=\"width: 22%;\" \/> <col style=\"width: 13%;\" \/> <col style=\"width: 27%;\" \/> <\/colgroup><thead><tr><th scope=\"col\">Mat\u00e9riau en aluminium<\/th><th scope=\"col\">\u00c9tat m\u00e9tallurgique ou condition<\/th><th scope=\"col\">Conductivit\u00e9 thermique, W\/m\u00b7K<\/th><th scope=\"col\">Btu\/(h\u00b7ft\u00b7\u00b0F)<\/th><th scope=\"col\">Interpr\u00e9tation pratique<\/th><\/tr><\/thead><tbody><tr><td>Aluminium pur<\/td><td>Pr\u00e8s de la temp\u00e9rature ambiante<\/td><td>235\u2013237<\/td><td>135.8\u2013136.9<\/td><td>Valeur de r\u00e9f\u00e9rence la plus \u00e9lev\u00e9e du tableau<\/td><\/tr><tr><td>1100<\/td><td>Ajustement NIST repr\u00e9sentatif \u00e0 293 K<\/td><td>\u2248212<\/td><td>\u2248122.5<\/td><td>Nuance commerciale de haute puret\u00e9<\/td><\/tr><tr><td>3003<\/td><td>O<\/td><td>193<\/td><td>111.5<\/td><td>Bonne conductivit\u00e9 et bonne aptitude au formage<\/td><\/tr><tr><td>5052<\/td><td>O<\/td><td>138<\/td><td>79.7<\/td><td>Alliage de t\u00f4le r\u00e9sistant \u00e0 la corrosion<\/td><\/tr><tr><td>6061<\/td><td>T6\/T651<\/td><td>167<\/td><td>96.5<\/td><td>Alliage courant pour structures et pi\u00e8ces usin\u00e9es<\/td><\/tr><tr><td>6063<\/td><td>T6<\/td><td>\u2248200<\/td><td>\u2248115.6<\/td><td>Alliage extrud\u00e9 courant pour dissipateurs thermiques<\/td><\/tr><tr><td>7075<\/td><td>T6<\/td><td>130<\/td><td>75.1<\/td><td>Haute r\u00e9sistance, conductivit\u00e9 plus faible<\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b8fae32 elementor-widget elementor-widget-text-editor\" data-id=\"b8fae32\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Interpr\u00e9tez le tableau en tenant compte des limites suivantes des sources :<\/p><ul><li>Le r\u00e9sultat pour le 1100 est calcul\u00e9 \u00e0 partir d\u2019un <a href=\"https:\/\/www.nist.gov\/mml\/acmd\/1100-aluminum-uns-a91100\">ancien ajustement de courbe du NIST<\/a>. Son \u00e9quation couvre la plage de 4 \u00e0 300 K.<\/li><li>Le NIST indique que les deux pages consacr\u00e9es aux alliages sont anciennes et ne sont plus mises \u00e0 jour. Il annonce une erreur d\u2019ajustement de 2 % pour le 1100 et de 0,5 % pour le 6061-T6.<\/li><li>Ces pourcentages d\u00e9crivent l\u2019ad\u00e9quation de chaque \u00e9quation \u00e0 ses donn\u00e9es sources. Ils ne constituent ni des plages de variabilit\u00e9 du mat\u00e9riau ni des tol\u00e9rances de conception.<\/li><\/ul><p>Utilisez le tableau pour les comparaisons et les premiers calculs. Pour la validation finale, utilisez les donn\u00e9es d\u2019essai mati\u00e8re certifi\u00e9es par le fournisseur.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e08dfbe elementor-widget elementor-widget-image\" data-id=\"e08dfbe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Aluminum-thermal-conductivity-chart.webp\" class=\"attachment-full size-full wp-image-21549\" alt=\"Comparaison de la conductivit\u00e9 thermique \u00e0 temp\u00e9rature ambiante des alliages d\u2019aluminium courants\" srcset=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Aluminum-thermal-conductivity-chart.webp 600w, https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Aluminum-thermal-conductivity-chart-300x200.webp 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Graphique de la conductivit\u00e9 thermique de l\u2019aluminium<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3a5c4e8 elementor-widget elementor-widget-text-editor\" data-id=\"3a5c4e8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Pourquoi les valeurs publi\u00e9es pour l\u2019aluminium diff\u00e8rent-elles ?<\/h2><p>L\u2019aluminium pur conduit principalement la chaleur gr\u00e2ce aux \u00e9lectrons mobiles. Les atomes d\u2019alliage perturbent le r\u00e9seau cristallin et diffusent ces \u00e9lectrons.<\/p><p>L\u2019effet d\u00e9pend de chaque \u00e9l\u00e9ment et de son \u00e9tat. Les atomes d\u2019alliage dissous r\u00e9duisent g\u00e9n\u00e9ralement davantage la conductivit\u00e9 que les atomes pr\u00e9cipit\u00e9s. Un traitement thermique peut donc modifier la conductivit\u00e9 sans changer la d\u00e9signation de l\u2019alliage.<\/p><p>L\u2019\u00e9tat m\u00e9tallurgique est important pour la m\u00eame raison. Les donn\u00e9es Kaiser pour le 6061 indiquent 180 W\/m\u00b7K \u00e0 l\u2019\u00e9tat O et <strong>167 W\/m\u00b7K \u00e0 l\u2019\u00e9tat T6\/T651<\/strong>. R\u00e9sistance m\u00e9canique et conductivit\u00e9 impliquent souvent un compromis.<\/p><p>Des sources valides peuvent n\u00e9anmoins diverger. L\u2019<a href=\"https:\/\/www.nist.gov\/mml\/acmd\/aluminum-6061-t6-uns-aa96061\">\u00e9quation NIST du 6061-T6<\/a> donne environ <strong>154 W\/m\u00b7K \u00e0 293 K<\/strong>, tandis que Kaiser indique <strong>167 W\/m\u00b7K \u00e0 20 \u00b0C<\/strong>.<\/p><p>Cette diff\u00e9rence peut provenir des jeux de donn\u00e9es, des formes de produits ou des hypoth\u00e8ses d\u2019essai. Consid\u00e9rez 154 et 167 comme des cas de comparaison entre sources, et non comme des bornes d\u2019incertitude.<\/p><p>Utilisez-les uniquement pour une premi\u00e8re analyse de sensibilit\u00e9 lorsque des donn\u00e9es correspondant \u00e0 la forme du produit ne sont pas disponibles. Les donn\u00e9es certifi\u00e9es du projet doivent d\u00e9finir les limites de conception.<\/p><p>La r\u00e9ponse \u00e0 la temp\u00e9rature d\u00e9pend de la nuance. L\u2019ajustement NIST du 6061-T6 varie fortement entre 77 et 293 K, passant d\u2019environ 84 \u00e0 154 W\/m\u00b7K.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-d122cce e-con-full e-flex e-con e-child\" data-id=\"d122cce\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ab3f9d0 elementor-widget__width-initial elementor-widget-mobile__width-initial elementor-widget elementor-widget-image\" data-id=\"ab3f9d0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"330\" src=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Thermal-Conductivity-of-Aluminum-6063-T5-from-4K-to-300K.webp\" class=\"attachment-full size-full wp-image-21550\" alt=\"Conductivit\u00e9 thermique de l\u2019aluminium 6063-T5 de 4 K \u00e0 300 K\" srcset=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Thermal-Conductivity-of-Aluminum-6063-T5-from-4K-to-300K.webp 400w, https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Thermal-Conductivity-of-Aluminum-6063-T5-from-4K-to-300K-300x248.webp 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Conductivit\u00e9 thermique de l\u2019aluminium 6063-T5 de 4 K \u00e0 300 K<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-40f34e9 elementor-widget__width-initial elementor-widget-mobile__width-initial elementor-widget elementor-widget-image\" data-id=\"40f34e9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"330\" src=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Thermal-Conductivity-of-Aluminum-6061-T6-from-4K-to-300K.webp\" class=\"attachment-full size-full wp-image-21551\" alt=\"Conductivit\u00e9 thermique de l\u2019aluminium 6061-T6 de 4 K \u00e0 300 K\" srcset=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Thermal-Conductivity-of-Aluminum-6061-T6-from-4K-to-300K.webp 400w, https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Thermal-Conductivity-of-Aluminum-6061-T6-from-4K-to-300K-300x248.webp 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Conductivit\u00e9 thermique de l\u2019aluminium 6061-T6 de 4 K \u00e0 300 K<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-29ae551 elementor-widget elementor-widget-text-editor\" data-id=\"29ae551\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>L\u2019<a href=\"https:\/\/www.nist.gov\/mml\/acmd\/1100-aluminum-uns-a91100\">ajustement NIST du 1100<\/a> \u00e9volue dans le sens oppos\u00e9. Sur le m\u00eame intervalle, il diminue d\u2019environ 290 W\/m\u00b7K \u00e0 212 W\/m\u00b7K.<\/p><p>Ces donn\u00e9es couvrent la plage allant des temp\u00e9ratures cryog\u00e9niques \u00e0 la temp\u00e9rature ambiante. Elles ne permettent pas de pr\u00e9voir le comportement au-dessus de la temp\u00e9rature ambiante.<\/p><p>Une <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0921509324016976\">revue critique publi\u00e9e en 2025<\/a> synth\u00e9tise des courbes d\u00e9pendant de la nuance \u00e0 des temp\u00e9ratures plus \u00e9lev\u00e9es. Utilisez un jeu de donn\u00e9es d\u00e9pendant de la temp\u00e9rature pour l\u2019alliage et l\u2019\u00e9tat exacts.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6aad289 elementor-widget elementor-widget-text-editor\" data-id=\"6aad289\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Conductivit\u00e9 thermique, chaleur massique et diffusivit\u00e9 thermique<\/h2><p>Ces propri\u00e9t\u00e9s r\u00e9pondent \u00e0 des questions thermiques diff\u00e9rentes.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f55a82b elementor-widget elementor-widget-text-editor\" data-id=\"f55a82b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<table class=\"zj-table\"><colgroup> <col style=\"width: 26%;\" \/> <col style=\"width: 22%;\" \/> <col style=\"width: 52%;\" \/> <\/colgroup>\n<thead>\n<tr>\n<th scope=\"col\">Propri\u00e9t\u00e9<\/th>\n<th scope=\"col\">Symbole et unit\u00e9<\/th>\n<th scope=\"col\">Ce qu\u2019elle d\u00e9crit<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Conductivit\u00e9 thermique<\/td>\n<td><code>k<\/code>, W\/(m\u00b7K)<\/td>\n<td>Flux de chaleur sous l\u2019effet d\u2019un gradient de temp\u00e9rature<\/td>\n<\/tr>\n<tr>\n<td>Chaleur massique<\/td>\n<td><code>cp<\/code>, J\/(kg\u00b7K)<\/td>\n<td>\u00c9nergie n\u00e9cessaire pour modifier la temp\u00e9rature du mat\u00e9riau<\/td>\n<\/tr>\n<tr>\n<td>Diffusivit\u00e9 thermique<\/td>\n<td><code>\u03b1<\/code>, m\u00b2\/s<\/td>\n<td>Vitesse de r\u00e9ponse du champ de temp\u00e9rature<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ba5a570 elementor-widget elementor-widget-text-editor\" data-id=\"ba5a570\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>La diffusivit\u00e9 thermique combine les trois propri\u00e9t\u00e9s du mat\u00e9riau : <strong>\u03b1 = k\/(\u03c1cp)<\/strong>. Une conductivit\u00e9 \u00e9lev\u00e9e ne signifie pas automatiquement une capacit\u00e9 thermique \u00e9lev\u00e9e.<\/p><p>Utilisez la <a href=\"https:\/\/zjaluminum-cnc.com\/blog\/specific-heat-capacity-of-aluminum\/\">chaleur massique de l\u2019aluminium<\/a> pour calculer l\u2019\u00e9nergie stock\u00e9e ou un \u00e9chauffement transitoire. Utilisez la conductivit\u00e9 pour un flux thermique permanent \u00e0 travers une g\u00e9om\u00e9trie connue.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4737f0a elementor-widget elementor-widget-text-editor\" data-id=\"4737f0a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Comment calculer le flux de chaleur \u00e0 travers l\u2019aluminium<\/h2><p>Pour une conduction unidimensionnelle en r\u00e9gime permanent, la loi de Fourier s\u2019\u00e9crit :<\/p><p style=\"text-align: center;\"><strong>Q = k \u00d7 A \u00d7 \u0394T \/ L<\/strong><\/p><p>La r\u00e9sistance thermique de conduction \u00e9quivalente est :<\/p><p style=\"text-align: center;\"><strong>Rcond = L \/ (k \u00d7 A)<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d448d2c elementor-widget elementor-widget-text-editor\" data-id=\"d448d2c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<table class=\"zj-table\">\n  <colgroup>\n    <col style=\"width:22%\">\n    <col style=\"width:55%\">\n    <col style=\"width:23%\">\n  <\/colgroup>\n  <thead>\n    <tr>\n      <th scope=\"col\">Symbole<\/th>\n      <th scope=\"col\">Signification<\/th>\n      <th scope=\"col\">Unit\u00e9 SI<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td><code>Q<\/code><\/td>\n      <td>D\u00e9bit de transfert thermique<\/td>\n      <td>W<\/td>\n    <\/tr>\n    <tr>\n      <td><code>k<\/code><\/td>\n      <td>Conductivit\u00e9 thermique<\/td>\n      <td>W\/(m\u00b7K)<\/td>\n    <\/tr>\n    <tr>\n      <td><code>A<\/code><\/td>\n      <td>Surface normale au flux de chaleur<\/td>\n      <td>m\u00b2<\/td>\n    <\/tr>\n    <tr>\n      <td><code>\u0394T<\/code><\/td>\n      <td>Diff\u00e9rence de temp\u00e9rature<\/td>\n      <td>K<\/td>\n    <\/tr>\n    <tr>\n      <td><code>L<\/code><\/td>\n      <td>Longueur du trajet thermique<\/td>\n      <td>m<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cf22ec6 elementor-widget elementor-widget-text-editor\" data-id=\"cf22ec6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Les <a href=\"https:\/\/web.mit.edu\/16.unified\/www\/FALL\/thermodynamics\/notes\/node116.html\">notes du MIT sur le transfert thermique<\/a> donnent la m\u00eame relation pour une paroi plane.<\/p><p>Consid\u00e9rons une plaque en 6061-T6 dont la source de chaleur couvre 25 \u00d7 25 mm. La plaque a une \u00e9paisseur de 5 mm et transmet 20 W.<\/p><p>Avec <strong>k = 167 W\/(m\u00b7K)<\/strong> :<\/p><p style=\"text-align: center;\"><strong>Rcond = 0.005\/(167 \u00d7 0.000625) = 0.0479 K\/W<\/strong><\/p><p style=\"text-align: center;\"><strong>\u0394T = 20 \u00d7 0.0479 = 0.96 K<\/strong><\/p><p>La chute de temp\u00e9rature id\u00e9ale dans la masse est donc d\u2019environ <strong>0.96 K<\/strong>. Dans la m\u00eame g\u00e9om\u00e9trie, l\u2019aluminium pur donnerait environ 0.68 K.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0383f73 elementor-widget elementor-widget-image\" data-id=\"0383f73\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"379\" src=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Heat-Dissipation-Simulation-of-a-6063-Aluminum-Heat-Sink.webp\" class=\"attachment-full size-full wp-image-21552\" alt=\"Simulation de dissipation thermique d\u2019un dissipateur en aluminium 6063 : refroidissement par air, avec une temp\u00e9rature de surface d\u2019environ 130 degr\u00e9s Celsius\" srcset=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Heat-Dissipation-Simulation-of-a-6063-Aluminum-Heat-Sink.webp 600w, https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Heat-Dissipation-Simulation-of-a-6063-Aluminum-Heat-Sink-300x190.webp 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Simulation de dissipation thermique d\u2019un dissipateur en aluminium 6063<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d2b60b7 elementor-widget elementor-widget-text-editor\" data-id=\"d2b60b7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Cette estimation exclut la r\u00e9sistance d\u2019\u00e9talement, les interfaces, la convection, le rayonnement et l\u2019\u00e9chauffement non uniforme. Ces contributions peuvent d\u00e9passer la r\u00e9sistance de la plaque dans la masse.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-90ef9c0 elementor-widget elementor-widget-text-editor\" data-id=\"90ef9c0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Aluminium ou cuivre pour le transfert thermique<\/h2><p>Le cuivre pr\u00e9sente une conductivit\u00e9 d\u2019environ <strong>400 W\/m\u00b7K<\/strong> \u00e0 295 K. L\u2019aluminium est beaucoup plus l\u00e9ger.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-364ae91 elementor-widget elementor-widget-text-editor\" data-id=\"364ae91\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<table class=\"zj-table\">\n  <colgroup>\n    <col style=\"width:38%\">\n    <col style=\"width:31%\">\n    <col style=\"width:31%\">\n  <\/colgroup>\n  <thead>\n    <tr>\n      <th scope=\"col\">Contrainte<\/th>\n      <th scope=\"col\">Cuivre<\/th>\n      <th scope=\"col\">Aluminium<\/th>\n    <\/tr>\n  <\/thead>\n  <tbody>\n    <tr>\n      <td>\u00c9paisseur et surface identiques<\/td>\n      <td>R\u00e9sistance de conduction plus faible<\/td>\n      <td>R\u00e9sistance de conduction plus \u00e9lev\u00e9e<\/td>\n    <\/tr>\n    <tr>\n      <td>Masse identique<\/td>\n      <td>Volume disponible plus faible<\/td>\n      <td>Environ 3,3 fois plus de volume<\/td>\n    <\/tr>\n    <tr>\n      <td>Avantage de fabrication courant<\/td>\n      <td>Excellente diffusion de la chaleur<\/td>\n      <td>Faible masse et extrusion ais\u00e9e<\/td>\n    <\/tr>\n  <\/tbody>\n<\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-26e9ac3 elementor-widget elementor-widget-text-editor\" data-id=\"26e9ac3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Le <a href=\"https:\/\/www.nist.gov\/ncnr\/neutron-instruments\/sample-environment\/sample-mounting\/reference-tables\">tableau de r\u00e9f\u00e9rence du NIST<\/a> indique <strong>8.96 g\/cm\u00b3<\/strong> pour le cuivre et <strong>2.70 g\/cm\u00b3<\/strong> pour l\u2019aluminium. \u00c0 g\u00e9om\u00e9trie \u00e9gale, le cuivre transf\u00e8re plus efficacement la chaleur dans le solide.<\/p><p>\u00c0 masse \u00e9gale, l\u2019espace de conception change. L\u2019aluminium peut offrir davantage de volume, de surface ou de longueur d\u2019ailettes. Le r\u00e9sultat final d\u00e9pend de la g\u00e9om\u00e9trie, du d\u00e9bit d\u2019air, des interfaces et des contraintes de fabrication.<\/p><p>C\u2019est pourquoi de nombreux dissipateurs utilisent des ailettes en aluminium avec une base en cuivre ou un caloduc. La conception attribue \u00e0 chaque m\u00e9tal la fonction qui lui convient.<\/p><p>Pour comparer les co\u00fbts, comparez des ensembles livr\u00e9s offrant les m\u00eames performances thermiques. Incluez la masse de m\u00e9tal, la forme du brut, la transformation, l\u2019assemblage, la finition et la logistique.<\/p><p>\u00c9vitez d\u2019appliquer un rapport fixe entre les prix des m\u00e9taux bruts. Si le cuivre entra\u00eene un surco\u00fbt dans le devis, quantifiez le gain de temp\u00e9rature, d\u2019encombrement ou de masse qu\u2019il procure.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c3d1b7d elementor-widget elementor-widget-image\" data-id=\"c3d1b7d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"350\" src=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Copper-Pin-Fin-Heat-Sink.webp\" class=\"attachment-full size-full wp-image-21553\" alt=\"Dissipateur thermique \u00e0 picots en cuivre\" srcset=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Copper-Pin-Fin-Heat-Sink.webp 600w, https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Copper-Pin-Fin-Heat-Sink-300x175.webp 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Dissipateur thermique \u00e0 picots en cuivre<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1e1a44a elementor-widget elementor-widget-text-editor\" data-id=\"1e1a44a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Quels alliages d\u2019aluminium conviennent aux pi\u00e8ces thermiques courantes ?<\/h2><p>Utilisez ce tableau comme pr\u00e9s\u00e9lection. Avant le lancement en production s\u00e9rie, le projet doit toutefois faire l\u2019objet d\u2019une validation par simulation et d\u2019essais sur prototype.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dea808f elementor-widget elementor-widget-text-editor\" data-id=\"dea808f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<table class=\"zj-table\"><colgroup> <col style=\"width: 34%;\" \/> <col style=\"width: 25%;\" \/> <col style=\"width: 41%;\" \/> <\/colgroup><thead><tr><th scope=\"col\">Pi\u00e8ce thermique<\/th><th scope=\"col\">Point de d\u00e9part<\/th><th scope=\"col\">Points \u00e0 v\u00e9rifier avant le choix<\/th><\/tr><\/thead><tbody><tr><td>Dissipateur extrud\u00e9 refroidi par air<\/td><td>6063-T5 ou T6<\/td><td>G\u00e9om\u00e9trie des ailettes, r\u00e9sistance, \u00e9tat m\u00e9tallurgique et finition<\/td><\/tr><tr><td>Plaque froide, base ou bo\u00eetier usin\u00e9<\/td><td>6061-T6<\/td><td>Conception des canaux, \u00e9tanch\u00e9it\u00e9, assemblage et donn\u00e9es correspondant \u00e0 la forme du brut<\/td><\/tr><tr><td>Radiateur ou \u00e9changeur thermique form\u00e9<\/td><td>3003 dans l\u2019\u00e9tat requis<\/td><td>Formage, brasage, corrosion et syst\u00e8me de placage<\/td><\/tr><tr><td>Bo\u00eetier form\u00e9 ou \u00e9changeur expos\u00e9 \u00e0 la corrosion<\/td><td>5052 dans l\u2019\u00e9tat requis<\/td><td>Conductivit\u00e9 plus faible, \u00e9paisseur de paroi et proc\u00e9d\u00e9 d\u2019assemblage<\/td><\/tr><tr><td>Structure thermique privil\u00e9giant la r\u00e9sistance<\/td><td>7075-T6<\/td><td>V\u00e9rifier si le gain de r\u00e9sistance justifie la conductivit\u00e9 plus faible<\/td><\/tr><tr><td>Diffuseur \u00e0 haute conductivit\u00e9<\/td><td>1100 ou aluminium de haute puret\u00e9<\/td><td>Limites de r\u00e9sistance, d\u2019assemblage et de fabrication<\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8bce9bd elementor-widget elementor-widget-text-editor\" data-id=\"8bce9bd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Les <a href=\"https:\/\/www.hydro.com\/Document\/Index?id=7823&amp;name=Hydro+EN+AW+6063.PDF\" rel=\"nofollow\">donn\u00e9es Hydro sur le 6063<\/a> citent les dissipateurs thermiques parmi les applications typiques. Les recommandations d\u2019Hydro associent \u00e9galement les alliages <a href=\"https:\/\/www.hydro.com\/us\/global\/aluminum\/products\/extruded-profiles\/alloys-for-aluminum-extrusions\/30033103-alloys\/\" rel=\"nofollow\">3003 et 3103<\/a> aux \u00e9changeurs thermiques et aux composants HVACR.<\/p><p>Le choix final d\u00e9pend toujours du plan, des charges, de l\u2019environnement, du proc\u00e9d\u00e9 et des propri\u00e9t\u00e9s certifi\u00e9es du brut.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-element elementor-element-42cd87f e-con-full e-flex e-con e-child\" data-id=\"42cd87f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f512d39 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"f512d39\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"300\" src=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/CNC-Machined-6063-Extruded-Air-Cooled-Heat-Sink.webp\" class=\"attachment-full size-full wp-image-21554\" alt=\"Dissipateur extrud\u00e9 6063 refroidi par air, usin\u00e9 CNC et fix\u00e9 par boulons \u00e0 la base\" srcset=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/CNC-Machined-6063-Extruded-Air-Cooled-Heat-Sink.webp 400w, https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/CNC-Machined-6063-Extruded-Air-Cooled-Heat-Sink-300x225.webp 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Dissipateur extrud\u00e9 6063 refroidi par air et usin\u00e9 CNC<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-072b9e6 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"072b9e6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"300\" src=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Anodized-6063-Aluminum-Heat-Sink.webp\" class=\"attachment-full size-full wp-image-21555\" alt=\"Dissipateur en alliage d\u2019aluminium 6063 anodis\u00e9 bleu, refroidi par air et mont\u00e9 en surface\" srcset=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Anodized-6063-Aluminum-Heat-Sink.webp 400w, https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Anodized-6063-Aluminum-Heat-Sink-300x225.webp 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Dissipateur thermique en aluminium 6063 anodis\u00e9<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3199f2d elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"3199f2d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"300\" src=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/6061-Water-Cooled-Heat-Sink.webp\" class=\"attachment-full size-full wp-image-21556\" alt=\"Dissipateur en aluminium 6061 refroidi par eau, avec base \u00e0 ailettes carr\u00e9es et canaux de refroidissement liquide\" srcset=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/6061-Water-Cooled-Heat-Sink.webp 400w, https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/6061-Water-Cooled-Heat-Sink-300x225.webp 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Dissipateur thermique 6061 refroidi par eau<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-93b457b elementor-widget elementor-widget-text-editor\" data-id=\"93b457b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Qu\u2019est-ce qui modifie les performances thermiques d\u2019une pi\u00e8ce r\u00e9elle ?<\/h2><h3>Alliage et \u00e9tat m\u00e9tallurgique<\/h3><p>La conductivit\u00e9 diminue lorsque les atomes en solution et les d\u00e9fauts diffusent les \u00e9lectrons. Le vieillissement peut modifier l\u2019\u00e9quilibre entre solut\u00e9s et pr\u00e9cipit\u00e9s. Le <a href=\"https:\/\/zjaluminum-cnc.com\/blog\/t5-and-t6-of-aluminum\/\">guide du site sur les \u00e9tats T5 et T6<\/a> explique ces parcours m\u00e9tallurgiques.<\/p><h3>Forme du produit et transformation<\/h3><p>Les plaques, extrusions, pi\u00e8ces forg\u00e9es et pi\u00e8ces moul\u00e9es peuvent pr\u00e9senter des microstructures diff\u00e9rentes. La porosit\u00e9 de fonderie interrompt \u00e9galement les trajets thermiques. Dans la mesure du possible, utilisez des donn\u00e9es correspondant au brut fourni.<\/p><h3>G\u00e9om\u00e9trie et interfaces<\/h3><p>L\u2019\u00e9paisseur, la surface de contact, la plan\u00e9it\u00e9 et le mat\u00e9riau d\u2019interface thermique influencent la r\u00e9sistance. La surface des ailettes et le d\u00e9bit d\u2019air commandent le transfert vers le fluide environnant. La conductivit\u00e9 de la masse n\u2019est qu\u2019un terme parmi d\u2019autres.<\/p><h3>Anodisation et rev\u00eatements<\/h3><p>L\u2019oxyde anodique conduit moins bien la chaleur que le substrat en aluminium. Une face d\u2019appui rev\u00eatue peut donc ajouter une r\u00e9sistance de contact.<\/p><p>La surface expos\u00e9e peut se comporter diff\u00e9remment. L\u2019anodisation peut augmenter l\u2019\u00e9missivit\u00e9 et am\u00e9liorer le transfert thermique par rayonnement. Son int\u00e9r\u00eat est plus important lorsque le rayonnement repr\u00e9sente une part significative du refroidissement.<\/p><p>Une <a href=\"https:\/\/www.sfu.ca\/~mbahrami\/pdf\/2020\/Z.%20Zhang%2C%20M.%20Collins%2C%20E.%20Lau%2C%20C.%20Botting%2C%20M.%20Bahrami%20-%20The%20Role%20of%20Anodization.pdf\">\u00e9tude sur des dissipateurs refroidis par convection naturelle<\/a> a montr\u00e9 que le r\u00e9sultat d\u00e9pend des conditions de fonctionnement. Indiquez dans le mod\u00e8le thermique le type et l\u2019\u00e9paisseur du rev\u00eatement ainsi que le masquage des surfaces de contact. Pour la terminologie des finitions, consultez le <a href=\"https:\/\/zjaluminum-cnc.com\/blog\/type-i-vs-type-ii-vs-type-iii-anodizing\/\">guide de l\u2019anodisation de type I, II et III<\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-267d080 elementor-widget elementor-widget-image\" data-id=\"267d080\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Heat-Dissipation-Performance-of-Aluminum-with-Different-Surface-Treatments-Under-Radiative-Cooling-Conditions.webp\" class=\"attachment-full size-full wp-image-21557\" alt=\"\u00c9carts de temp\u00e9rature de base entre des dissipateurs en aluminium nus, anodis\u00e9s noir type II et anodis\u00e9s incolores type III en conditions de refroidissement radiatif\" srcset=\"https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Heat-Dissipation-Performance-of-Aluminum-with-Different-Surface-Treatments-Under-Radiative-Cooling-Conditions.webp 600w, https:\/\/zjaluminum-cnc.com\/wp-content\/uploads\/2026\/07\/Heat-Dissipation-Performance-of-Aluminum-with-Different-Surface-Treatments-Under-Radiative-Cooling-Conditions-300x200.webp 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Performances de dissipation thermique de l\u2019aluminium avec diff\u00e9rents traitements de surface en conditions de refroidissement radiatif<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c743269 elementor-widget elementor-widget-text-editor\" data-id=\"c743269\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Comment choisir une valeur pour la simulation ou la conception<\/h2><ol><li>Identifiez l\u2019alliage et l\u2019\u00e9tat m\u00e9tallurgique exacts.<\/li><li>Faites correspondre la valeur \u00e0 la temp\u00e9rature de fonctionnement.<\/li><li>Confirmez la forme du produit et la direction du mat\u00e9riau.<\/li><li>Privil\u00e9giez les donn\u00e9es gouvernementales, les normes ou les fiches techniques des producteurs.<\/li><li>V\u00e9rifiez si la valeur a \u00e9t\u00e9 mesur\u00e9e ou calcul\u00e9e.<\/li><li>Effectuez des analyses de sensibilit\u00e9 avec des valeurs basse, nominale et haute.<\/li><li>Validez les assemblages critiques dans des conditions aux limites r\u00e9alistes.<\/li><\/ol><p>La norme <a href=\"https:\/\/store.astm.org\/e1461-13r22.html\">ASTM E1461-13(2022)<\/a> couvre la mesure de la diffusivit\u00e9 thermique par m\u00e9thode flash. La conductivit\u00e9 peut ensuite \u00eatre calcul\u00e9e \u00e0 partir de la masse volumique et de la capacit\u00e9 thermique. La m\u00e9thode et les donn\u00e9es d\u2019entr\u00e9e doivent accompagner la valeur publi\u00e9e.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-912b72a elementor-widget elementor-widget-text-editor\" data-id=\"912b72a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>\u00c0 retenir<\/h2><p>N\u2019utilisez <strong>235\u2013237 W\/m\u00b7K<\/strong> que pour l\u2019aluminium pur pr\u00e8s de la temp\u00e9rature ambiante. Pour les pi\u00e8ces commerciales, utilisez des donn\u00e9es correspondant \u00e0 la forme et \u00e0 l\u2019\u00e9tat du produit.<\/p><p>Mod\u00e9lisez ensuite s\u00e9par\u00e9ment la g\u00e9om\u00e9trie, les interfaces, le d\u00e9bit d\u2019air et l\u2019\u00e9tat de surface. Confirmez ces param\u00e8tres avant de changer d\u2019alliage.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>L\u2019aluminium pur pr\u00e9sente une conductivit\u00e9 thermique d\u2019environ 235\u2013237 W\/m\u00b7K pr\u00e8s de la temp\u00e9rature ambiante, soit approximativement 136\u2013137 Btu\/(h\u00b7ft\u00b7\u00b0F). La valeur [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":21548,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":"","_members_access_role":[],"_members_access_error":""},"categories":[64],"tags":[],"class_list":["post-21547","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-material"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Conductivit\u00e9 thermique de l\u2019aluminium : valeurs par alliage<\/title>\n<meta name=\"description\" content=\"L\u2019aluminium pur pr\u00e9sente une conductivit\u00e9 thermique d\u2019environ 237 W\/m\u00b7K. 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