{"id":2434,"date":"2026-01-22T10:12:22","date_gmt":"2026-01-22T09:12:22","guid":{"rendered":"https:\/\/www.nickelcasting.com\/?p=2434"},"modified":"2026-01-30T03:01:46","modified_gmt":"2026-01-30T02:01:46","slug":"hastelloy-x-vs-inconel-718","status":"publish","type":"post","link":"https:\/\/www.nickelcasting.com\/fr\/hastelloy-x-vs-inconel-718\/","title":{"rendered":"Hastelloy X vs Inconel 718"},"content":{"rendered":"<p>Le choix du bon superalliage \u00e0 base de nickel est essentiel pour l'a\u00e9rospatiale, la production d'\u00e9nergie et le traitement chimique. Deux des principaux pr\u00e9tendants sont <b data-path-to-node=\"0\" data-index-in-node=\"154\"><a href=\"https:\/\/www.nickelcasting.com\/pt\/ligas-de-niquel\/hastelloy-nickel-alloys\/hastelloy-x\/\">Hastelloy X<\/a><\/b> et <b data-path-to-node=\"0\" data-index-in-node=\"170\"><a href=\"https:\/\/www.nickelcasting.com\/pt\/ligas-de-niquel\/ligas-de-niquel-inconel\/inconel-718\/\">Inconel 718<\/a><\/b>. Bien qu'ils offrent tous deux des performances exceptionnelles, ils jouent des r\u00f4les m\u00e9caniques et thermiques tr\u00e8s diff\u00e9rents.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"aligncenter size-full wp-image-2435\" src=\"http:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/66.jpg\" alt=\"\" width=\"1200\" height=\"655\" srcset=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/66.jpg 1200w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/66-300x164.jpg 300w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/66-1024x559.jpg 1024w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/66-768x419.jpg 768w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/66-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/p>\n<h3 data-path-to-node=\"2\">Comparaison entre Hastelloy X et 718<\/h3>\n<p data-path-to-node=\"3\">Au niveau mol\u00e9culaire, la diff\u00e9rence fondamentale entre <b data-path-to-node=\"3\" data-index-in-node=\"59\">Hastelloy X<\/b> et <b data-path-to-node=\"3\" data-index-in-node=\"75\">Inconel 718<\/b> r\u00e9side dans leurs m\u00e9canismes de renforcement. L'Hastelloy X est un <b data-path-to-node=\"3\" data-index-in-node=\"144\">solide-solution renforc\u00e9e<\/b> (principalement Nickel-Chrome-Fer-Molybd\u00e8ne), tandis que l'Inconel 718 est un alliage \u00e0 base de nickel-chrome-fer-molybd\u00e8ne. <b data-path-to-node=\"3\" data-index-in-node=\"252\">durcissable par pr\u00e9cipitation<\/b> (durci par l'\u00e2ge).<\/p>\n<p data-path-to-node=\"4\">L'Inconel 718 contient des quantit\u00e9s significatives de Niobium (<span class=\"math-inline\" data-math=\"Nb\" data-index-in-node=\"53\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">N<\/span><span class=\"mord mathnormal\">b<\/span><\/span><\/span><\/span><\/span>) et le titane (<span class=\"math-inline\" data-math=\"Ti\" data-index-in-node=\"71\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord mathnormal\">T<\/span><span class=\"mord mathnormal\">i<\/span><\/span><\/span><\/span><\/span>), qui forment le gamma premier (<span class=\"math-inline\" data-math=\"\\gamma'\" data-index-in-node=\"100\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">\u03b3<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">\u2032<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>) et gamma double-prime (<span class=\"math-inline\" data-math=\"\\gamma''\" data-index-in-node=\"133\"><span class=\"katex\"><span class=\"katex-html\" aria-hidden=\"true\"><span class=\"base\"><span class=\"mord\"><span class=\"mord mathnormal\">\u03b3<\/span><span class=\"msupsub\"><span class=\"vlist-t\"><span class=\"vlist-r\"><span class=\"vlist\"><span class=\"\"><span class=\"sizing reset-size6 size3 mtight\"><span class=\"mord mtight\">\u2032\u2032<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>) se pr\u00e9cipite. Il est donc nettement plus dur et plus r\u00e9sistant que l'Hastelloy X \u00e0 temp\u00e9rature ambiante et mod\u00e9r\u00e9e. D'autre part, l'Hastelloy X se concentre sur les \u00e9l\u00e9ments suivants <b data-path-to-node=\"4\" data-index-in-node=\"299\">r\u00e9sistance \u00e0 l'oxydation<\/b> et <b data-path-to-node=\"4\" data-index-in-node=\"324\">fabricabilit\u00e9<\/b>, making it a &#8220;workhorse&#8221; for components that need to withstand extreme heat without necessarily carrying heavy structural loads.<\/p>\n<table data-path-to-node=\"5\">\n<thead>\n<tr>\n<td><strong>Propri\u00e9t\u00e9<\/strong><\/td>\n<td><strong>Hastelloy X (UNS N06002)<\/strong><\/td>\n<td><strong>Inconel 718 (UNS N07718)<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"5,1,0,0\"><b data-path-to-node=\"5,1,0,0\" data-index-in-node=\"0\">M\u00e9canisme de r\u00e9sistance primaire<\/b><\/span><\/td>\n<td><span data-path-to-node=\"5,1,1,0\">Solution solide<\/span><\/td>\n<td><span data-path-to-node=\"5,1,2,0\">Durcissement par pr\u00e9cipitation<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"5,2,0,0\"><b data-path-to-node=\"5,2,0,0\" data-index-in-node=\"0\">Densit\u00e9 (<span class=\"math-inline\" data-math=\"g\/cm^3\" data-index-in-node=\"9\">$g\/cm^3$<\/span>)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"5,2,1,0\">8.22<\/span><\/td>\n<td><span data-path-to-node=\"5,2,2,0\">8.19<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"5,3,0,0\"><b data-path-to-node=\"5,3,0,0\" data-index-in-node=\"0\">Plage de fusion<\/b><\/span><\/td>\n<td><span data-path-to-node=\"5,3,1,0\">2300-2470\u00b0F (1260-1355\u00b0C)<\/span><\/td>\n<td><span data-path-to-node=\"5,3,2,0\">2300-2437\u00b0F (1260-1336\u00b0C)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"5,4,0,0\"><b data-path-to-node=\"5,4,0,0\" data-index-in-node=\"0\">Limite d'\u00e9lasticit\u00e9 (\u00e0 1200\u00b0F)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"5,4,1,0\">~35 000 psi (240 MPa)<\/span><\/td>\n<td><span data-path-to-node=\"5,4,2,0\">~150 000 psi (1030 MPa)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"5,5,0,0\"><b data-path-to-node=\"5,5,0,0\" data-index-in-node=\"0\">Limite d'oxydation maximale<\/b><\/span><\/td>\n<td><span data-path-to-node=\"5,5,1,0\">2200\u00b0F (1200\u00b0C)<\/span><\/td>\n<td><span data-path-to-node=\"5,5,2,0\">1300\u00b0F (704\u00b0C)<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3 data-path-to-node=\"7\">Hastelloy X vs 718 R\u00e9sistance \u00e0 haute temp\u00e9rature<\/h3>\n<p data-path-to-node=\"8\">Lors de l'analyse des <b data-path-to-node=\"8\" data-index-in-node=\"15\">R\u00e9sistance \u00e0 haute temp\u00e9rature Hastelloy X vs 718<\/b>, you must distinguish between &#8220;load-bearing strength&#8221; and &#8220;environmental survival.&#8221;<\/p>\n<ul data-path-to-node=\"9\">\n<li>\n<p data-path-to-node=\"9,0,0\"><b data-path-to-node=\"9,0,0\" data-index-in-node=\"0\">Inconel 718<\/b> est le roi de l'int\u00e9grit\u00e9 structurelle jusqu'\u00e0 <b data-path-to-node=\"9,0,0\" data-index-in-node=\"54\">1300\u00b0F (700\u00b0C)<\/b>. Il conserve d'incroyables propri\u00e9t\u00e9s de r\u00e9sistance au fluage et \u00e0 la rupture et de traction. Cependant, lorsque les temp\u00e9ratures d\u00e9passent ce seuil, les pr\u00e9cipit\u00e9s qui conf\u00e8rent au 718 sa r\u00e9sistance commencent \u00e0 devenir plus grossiers (overage), et le mat\u00e9riau perd rapidement ses avantages structurels.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"9,1,0\"><b data-path-to-node=\"9,1,0\" data-index-in-node=\"0\">Hastelloy X<\/b> n'a pas la m\u00eame limite d'\u00e9lasticit\u00e9 que le 718, mais il offre une stabilit\u00e9 sup\u00e9rieure \u00e0 des temp\u00e9ratures beaucoup plus \u00e9lev\u00e9es. Il offre une r\u00e9sistance exceptionnelle \u00e0 la <b data-path-to-node=\"9,1,0\" data-index-in-node=\"149\">r\u00e9sistance \u00e0 l'oxydation<\/b> jusqu'\u00e0 <b data-path-to-node=\"9,1,0\" data-index-in-node=\"176\">2200\u00b0F (1200\u00b0C)<\/b>. Il r\u00e9siste \u00e0 la carburation et \u00e0 la nitruration, qui sont des modes de d\u00e9faillance courants dans les zones de combustion des turbines \u00e0 gaz.<\/p>\n<\/li>\n<\/ul>\n<h3 data-path-to-node=\"11\"><img decoding=\"async\" class=\"aligncenter size-full wp-image-2436\" src=\"http:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/67.jpg\" alt=\"\" width=\"1200\" height=\"655\" srcset=\"https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/67.jpg 1200w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/67-300x164.jpg 300w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/67-1024x559.jpg 1024w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/67-768x419.jpg 768w, https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/67-18x10.jpg 18w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/h3>\n<h3 data-path-to-node=\"11\">Hastelloy X vs 718 Comment choisir<\/h3>\n<p data-path-to-node=\"12\">La d\u00e9cision sur <b data-path-to-node=\"12\" data-index-in-node=\"16\">Hastelloy X vs 718 : comment choisir ?<\/b> se r\u00e9sume g\u00e9n\u00e9ralement \u00e0 la temp\u00e9rature de fonctionnement et aux exigences structurelles de la pi\u00e8ce.<\/p>\n<ol start=\"1\" data-path-to-node=\"13\">\n<li>\n<p data-path-to-node=\"13,0,0\"><b data-path-to-node=\"13,0,0\" data-index-in-node=\"0\">S\u00e9lectionnez l'Inconel 718 si :<\/b> Vous concevez des composants soumis \u00e0 de fortes contraintes, tels que des disques de turbine, des fixations ou des r\u00e9servoirs cryog\u00e9niques, pour lesquels la limite d'\u00e9lasticit\u00e9 et la r\u00e9sistance \u00e0 la fatigue sont des priorit\u00e9s absolues en dessous de 1300\u00b0F.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"13,1,0\"><b data-path-to-node=\"13,1,0\" data-index-in-node=\"0\">Choisir Hastelloy X si :<\/b> You are designing &#8220;hot-section&#8221; components like combustion liners, afterburners, or furnace retorts. If the part must survive in an oxidizing environment above 1500\u00b0F, Hastelloy X is the safer, more durable choice.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"13,2,0\"><b data-path-to-node=\"13,2,0\" data-index-in-node=\"0\">Besoins en mati\u00e8re de fabrication :<\/b> L'Hastelloy X est g\u00e9n\u00e9ralement plus facile \u00e0 souder et \u00e0 former. L'Inconel 718, bien que soudable, est plus sensible \u00e0 la fissuration par d\u00e9formation et n\u00e9cessite un traitement thermique post-soudure rigoureux pour atteindre sa pleine r\u00e9sistance.<\/p>\n<\/li>\n<\/ol>\n<hr data-path-to-node=\"14\" \/>\n<h3 data-path-to-node=\"15\">Questions et r\u00e9ponses connexes<\/h3>\n<p data-path-to-node=\"16\"><b data-path-to-node=\"16\" data-index-in-node=\"0\">Q1 : L'Inconel 718 peut-il \u00eatre utilis\u00e9 pour les moufles de four ?<\/b> En g\u00e9n\u00e9ral, non. Bien que le 718 soit r\u00e9sistant, il n'est pas optimis\u00e9 pour l'oxydation constante \u00e0 haute temp\u00e9rature que l'on trouve dans les fours. Hastelloy X ou <a href=\"https:\/\/www.nickelcasting.com\/pt\/ligas-de-niquel\/ligas-de-niquel-inconel\/inconel-600\/\">Inconel 600<\/a> sont mieux adapt\u00e9s aux environnements de fours non structurels.<\/p>\n<p data-path-to-node=\"17\"><b data-path-to-node=\"17\" data-index-in-node=\"0\">Q2 : L'Hastelloy X est-il plus cher que l'Inconel 718 ?<\/b> Les prix fluctuent en fonction des march\u00e9s du molybd\u00e8ne et du nickel, mais l'Hastelloy X fait souvent l'objet d'une prime en raison de sa teneur sp\u00e9cialis\u00e9e en molybd\u00e8ne et de son volume de production inf\u00e9rieur \u00e0 celui de l'Inconel 718, largement utilis\u00e9.<\/p>\n<p data-path-to-node=\"18\"><b data-path-to-node=\"18\" data-index-in-node=\"0\">Q3 : Quel est le meilleur alliage pour les applications cryog\u00e9niques ?<\/b> L'Inconel 718 est exceptionnellement bien adapt\u00e9 aux temp\u00e9ratures cryog\u00e9niques, car il conserve une t\u00e9nacit\u00e9 et une r\u00e9sistance \u00e9lev\u00e9es sans devenir cassant, ce qui en fait un standard pour les syst\u00e8mes de propulsion de fus\u00e9es \u00e0 propergol liquide.<\/p>\n<p data-path-to-node=\"4\">","protected":false},"excerpt":{"rendered":"<p>Choosing the right nickel-based superalloy is critical for aerospace, power generation, and chemical processing. Two of the most prominent contenders are Hastelloy X and Inconel 718. While both offer exceptional performance, they serve very different mechanical and thermal roles. Hastelloy X vs 718 Comparison At the molecular level, the fundamental difference between Hastelloy X and [&hellip;]<\/p>","protected":false},"author":1,"featured_media":2435,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","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":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","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 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[3],"tags":[],"class_list":["post-2434","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"spectra_custom_meta":{"_edit_lock":["1769738364:1"],"_edit_last":["1"],"rank_math_internal_links_processed":["1"],"rank_math_seo_score":["57"],"rank_math_description":["Compare Hastelloy X and Inconel 718 in strengthening mechanisms, high-temperature performance, oxidation resistance, and applications."],"rank_math_focus_keyword":["hastelloy x vs inconel 718"],"_thumbnail_id":["2435"],"_wp_page_template":["default"],"site-sidebar-layout":["default"],"ast-site-content-layout":["default"],"site-content-style":["default"],"site-sidebar-style":["default"],"theme-transparent-header-meta":["default"],"ilj_blacklistdefinition":["a:0:{}"],"ilj_linkdefinition":["a:1:{i:0;s:26:\"Hastelloy X vs Inconel 718\";}"],"astra-migrate-meta-layouts":["set"],"_uag_page_assets":["a:9:{s:3:\"css\";s:263:\".uag-blocks-common-selector{z-index:var(--z-index-desktop) !important}@media (max-width: 976px){.uag-blocks-common-selector{z-index:var(--z-index-tablet) !important}}@media (max-width: 767px){.uag-blocks-common-selector{z-index:var(--z-index-mobile) !important}}\n\";s:2:\"js\";s:0:\"\";s:18:\"current_block_list\";a:8:{i:0;s:11:\"core\/search\";i:1;s:10:\"core\/group\";i:2;s:12:\"core\/heading\";i:3;s:17:\"core\/latest-posts\";i:4;s:20:\"core\/latest-comments\";i:5;s:13:\"core\/archives\";i:6;s:15:\"core\/categories\";i:7;s:10:\"core\/image\";}s:8:\"uag_flag\";b:0;s:11:\"uag_version\";s:10:\"1775911551\";s:6:\"gfonts\";a:0:{}s:10:\"gfonts_url\";s:0:\"\";s:12:\"gfonts_files\";a:0:{}s:14:\"uag_faq_layout\";b:0;}"],"_elementor_page_assets":["a:0:{}"],"_uag_css_file_name":["uag-css-2434.css"]},"uagb_featured_image_src":{"full":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/66.jpg",1200,655,false],"thumbnail":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/66-150x150.jpg",150,150,true],"medium":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/66-300x164.jpg",300,164,true],"medium_large":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/66-768x419.jpg",768,419,true],"large":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/66-1024x559.jpg",1024,559,true],"1536x1536":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/66.jpg",1200,655,false],"2048x2048":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/66.jpg",1200,655,false],"trp-custom-language-flag":["https:\/\/www.nickelcasting.com\/wp-content\/uploads\/2026\/01\/66-18x10.jpg",18,10,true]},"uagb_author_info":{"display_name":"nickel","author_link":"https:\/\/www.nickelcasting.com\/fr\/author\/nickel\/"},"uagb_comment_info":0,"uagb_excerpt":"Choosing the right nickel-based superalloy is critical for aerospace, power generation, and chemical processing. Two of the most prominent contenders are Hastelloy X and Inconel 718. While both offer exceptional performance, they serve very different mechanical and thermal roles. Hastelloy X vs 718 Comparison At the molecular level, the fundamental difference between Hastelloy X and\u2026","_links":{"self":[{"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/posts\/2434","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/comments?post=2434"}],"version-history":[{"count":2,"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/posts\/2434\/revisions"}],"predecessor-version":[{"id":2438,"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/posts\/2434\/revisions\/2438"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/media\/2435"}],"wp:attachment":[{"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/media?parent=2434"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/categories?post=2434"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nickelcasting.com\/fr\/wp-json\/wp\/v2\/tags?post=2434"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}