{"id":13182,"date":"2024-10-24T17:17:17","date_gmt":"2024-10-24T09:17:17","guid":{"rendered":"https:\/\/www.sogaworks.com\/?p=13182"},"modified":"2024-10-30T18:14:36","modified_gmt":"2024-10-30T10:14:36","slug":"austenite-vs-martensite-vs-ferrite","status":"publish","type":"post","link":"https:\/\/www.sogaworks.com\/fr\/blogs\/austenite-vs-martensite-vs-ferrite\/","title":{"rendered":"Types d'acier inoxydable : Austenite vs Martensite vs Ferrite"},"content":{"rendered":"<p>L'acier inoxydable est un mat\u00e9riau m\u00e9tallique tr\u00e8s r\u00e9pandu, largement utilis\u00e9 dans les domaines suivants <a href=\"https:\/\/www.sogaworks.com\/custom-cnc-machining-service\/\">Prototypage CNC<\/a>. Il existe diff\u00e9rents types d'acier : aust\u00e9nitique, martensitique, ferritique, etc. Chacun d'entre eux offre des propri\u00e9t\u00e9s uniques telles que la r\u00e9sistance \u00e0 la corrosion et une grande solidit\u00e9. Il est essentiel de comprendre ce qu'ils sont et leurs diff\u00e9rences pour choisir le bon type d'acier pour diverses applications.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Microstructure de l'acier<\/h2>\n\n\n\n<p>Le fer est l'\u00e9l\u00e9ment fondamental de l'acier. \u00c0 l'\u00e9tat solide, le fer pr\u00e9sente deux structures cristallines. L'une est la structure cubique centr\u00e9e sur le corps (BCC), qui existe dans deux plages de temp\u00e9rature. Elle est appel\u00e9e \u03b1-fer lorsqu'elle est pr\u00e9sente \u00e0 une temp\u00e9rature inf\u00e9rieure \u00e0 912 \u00b0C et \u03b4-Fe lorsqu'elle est pr\u00e9sente \u00e0 une temp\u00e9rature sup\u00e9rieure \u00e0 1394 \u00b0C. L'autre structure est la structure cubique \u00e0 faces centr\u00e9es (FCC), qui existe entre 912 \u00b0C et 1394 \u00b0C et est appel\u00e9e \u03b3-Fe.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"960\" height=\"540\" src=\"https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/metallic-crystal-structure.png\" alt=\"structure cristalline m\u00e9tallique\" class=\"wp-image-13187\" srcset=\"https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/metallic-crystal-structure.png 960w, https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/metallic-crystal-structure-300x169.png 300w, https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/metallic-crystal-structure-768x432.png 768w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><\/figure>\n\n\n\n<p>Le carbone est un autre \u00e9l\u00e9ment majeur de l'acier et joue un r\u00f4le crucial dans sa microstructure et ses propri\u00e9t\u00e9s. En g\u00e9n\u00e9ral, plus la teneur en carbone est \u00e9lev\u00e9e, plus la r\u00e9sistance de l'acier augmente, tandis que sa plasticit\u00e9 diminue. Le carbone existe principalement sous deux formes dans l'acier : l'une est dissoute dans le fer, formant une solution solide, et l'autre est un carbure de fer, connu sous le nom de c\u00e9mentite (FE3C), qui est dur et cassant.<\/p>\n\n\n\n<p>Lorsque le carbone se dissout dans le \u03b4-Fe, on parle de ferrite, qui conserve la structure cubique centr\u00e9e sur le corps. Lorsque le carbone se dissout dans le \u03b3-Fe, on parle d'aust\u00e9nite, qui conserve la structure cubique \u00e0 faces centr\u00e9es.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Qu'est-ce que l'acier inoxydable aust\u00e9nitique ?<\/h2>\n\n\n\n<p>\u00c0 temp\u00e9rature ambiante, l'aust\u00e9nite n'existe pas de mani\u00e8re ind\u00e9pendante et la r\u00e9gion de la phase aust\u00e9nitique est petite. Toutefois, en ajoutant certains \u00e9l\u00e9ments m\u00e9talliques \u00e0 l'acier, la r\u00e9gion de la phase aust\u00e9nitique peut \u00eatre \u00e9largie, rendant l'aust\u00e9nite stable \u00e0 temp\u00e9rature ambiante et formant un acier alli\u00e9 aust\u00e9nitique.<\/p>\n\n\n\n<p>L'acier inoxydable aust\u00e9nitique est un alliage form\u00e9 par l'ajout de 17%-25% de chrome et de 8%-25% de nickel \u00e0 l'acier au carbone. Voyons maintenant ce qu'est l'acier inoxydable. L'acier inoxydable est un type d'acier qui acquiert sa r\u00e9sistance \u00e0 la corrosion par l'ajout d'\u00e9l\u00e9ments, la caract\u00e9ristique typique \u00e9tant de contenir au moins 10,5% de chrome. Les alliages d'acier aust\u00e9nitiques sont une cat\u00e9gorie d'acier inoxydable.<\/p>\n\n\n\n<p>Pourquoi l'acier inoxydable aust\u00e9nitique r\u00e9siste-t-il \u00e0 la corrosion ? L'ajout de nickel permet \u00e0 l'acier de pr\u00e9senter une structure aust\u00e9nitique \u00e0 temp\u00e9rature ambiante, ce qui r\u00e9duit le nombre de cellules de corrosion form\u00e9es en raison des diff\u00e9rences de microstructure et am\u00e9liore la r\u00e9sistance \u00e0 la corrosion. L'ajout de chrome forme une couche dense d'oxyde de chrome \u00e0 la surface de l'acier, ce qui le rend moins sensible \u00e0 la rouille. Un exemple typique de SUS aust\u00e9nitique est le suivant <a href=\"https:\/\/www.sogaworks.com\/fr\/blogs\/stainless-steel-18-8-vs-316\/\">acier inoxydable 18-8<\/a>qui est un alliage contenant au moins 18% de chrome et au moins 8% de nickel.<\/p>\n\n\n\n<p>La carte heuristique ci-dessous pr\u00e9sente les nuances d'acier inoxydable aust\u00e9nitique.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img decoding=\"async\" width=\"1024\" height=\"724\" src=\"https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/Austenitic-stainless-steel-1024x724.jpg\" alt=\"\" class=\"wp-image-13190\" style=\"width:730px;height:auto\" srcset=\"https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/Austenitic-stainless-steel-1024x724.jpg 1024w, https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/Austenitic-stainless-steel-300x212.jpg 300w, https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/Austenitic-stainless-steel-768x543.jpg 768w, https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/Austenitic-stainless-steel-1536x1086.jpg 1536w, https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/Austenitic-stainless-steel.jpg 1753w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Propri\u00e9t\u00e9s de l'acier inoxydable aust\u00e9nitique<\/h2>\n\n\n\n<p>Non-magn\u00e9tique. L'acier inoxydable aust\u00e9nitique est non magn\u00e9tique \u00e0 temp\u00e9rature ambiante, ce qui le rend appropri\u00e9 pour les applications o\u00f9 il y a de fortes interf\u00e9rences magn\u00e9tiques.<\/p>\n\n\n\n<p>Excellente r\u00e9sistance \u00e0 la corrosion. L'acier inoxydable aust\u00e9nitique poss\u00e8de un ensemble bien \u00e9quilibr\u00e9 de propri\u00e9t\u00e9s, en particulier une r\u00e9sistance exceptionnelle aux acides oxydants. Il peut r\u00e9sister \u00e0 la corrosion par l'acide sulfurique, l'acide phosphorique, l'acide formique, l'acide ac\u00e9tique et l'ur\u00e9e.<\/p>\n\n\n\n<p>Bonne soudabilit\u00e9. La teneur \u00e9lev\u00e9e en nickel de l'acier inoxydable aust\u00e9nitique contribue \u00e0 la stabilit\u00e9 et \u00e0 la ductilit\u00e9 pendant le soudage. Le nickel aide \u00e0 pr\u00e9venir la formation de phases fragiles et am\u00e9liore la capacit\u00e9 du mat\u00e9riau \u00e0 absorber les contraintes de dilatation thermique sans se fissurer.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Qu'est-ce que l'acier inoxydable martensitique ?<\/h2>\n\n\n\n<p>La martensite est une solution solide sursatur\u00e9e de carbone dans l'\u03b1-Fe. Lorsque l'acier est chauff\u00e9 \u00e0 une certaine temp\u00e9rature pour former de l'aust\u00e9nite et qu'il est ensuite rapidement tremp\u00e9, il en r\u00e9sulte une microstructure cristalline tr\u00e8s dure connue sous le nom de martensite. La transformation commence lorsque l'aust\u00e9nite atteint la temp\u00e9rature de d\u00e9part de la transformation martensitique (Ms) et se poursuit jusqu'\u00e0 ce qu'elle tombe en dessous de la temp\u00e9rature de transformation (Mt). En g\u00e9n\u00e9ral, plus le pourcentage de transformation en martensite est \u00e9lev\u00e9, plus la r\u00e9sistance de l'acier martensitique obtenu est importante.<\/p>\n\n\n\t\t<div data-elementor-type=\"container\" data-elementor-id=\"13378\" class=\"elementor elementor-13378\" data-elementor-post-type=\"elementor_library\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b397deb e-flex e-con-boxed e-con e-parent\" data-id=\"b397deb\" data-element_type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d81b226 elementor-widget elementor-widget-heading\" data-id=\"d81b226\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p class=\"elementor-heading-title elementor-size-default\">Put Your Custom Parts into Production Today\uff01<\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-009c607 elementor-widget elementor-widget-button\" data-id=\"009c607\" data-element_type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/www.sogaworks.com\/client\/#\/quote\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Obtenir un devis<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\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\n\n\n\n<p>L'acier inoxydable martensitique a une structure cristalline t\u00e9tragonale centr\u00e9e sur le corps (BCT). Son principal compos\u00e9 est le chrome (10,5%-18%), mais ce type d'acier inoxydable contient des quantit\u00e9s plus importantes de carbone, et ses propri\u00e9t\u00e9s m\u00e9caniques peuvent \u00eatre ajust\u00e9es par des processus de traitement thermique tels que la trempe et le revenu. L'acier inoxydable martensitique est divis\u00e9 en acier martensitique \u00e0 faible teneur en carbone (0,05-0,25% de carbone) et en acier martensitique \u00e0 forte teneur en carbone (0,61-1,20% de carbone). L'acier martensitique \u00e0 faible teneur en carbone offre une meilleure r\u00e9sistance \u00e0 la corrosion, tandis que l'acier martensitique \u00e0 forte teneur en carbone est plus r\u00e9sistant mais plus fragile.<\/p>\n\n\n\n<p>Le sch\u00e9ma suivant illustre les principales cat\u00e9gories d'alliages d'acier inoxydable martensitique.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/Marternsite-stainless-steel-1024x576.jpg\" alt=\"Acier inoxydable Marternsite\" class=\"wp-image-13193\" srcset=\"https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/Marternsite-stainless-steel-1024x576.jpg 1024w, https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/Marternsite-stainless-steel-300x169.jpg 300w, https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/Marternsite-stainless-steel-768x432.jpg 768w, https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/Marternsite-stainless-steel.jpg 1280w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Propri\u00e9t\u00e9s de l'acier inoxydable martensitique<\/h3>\n\n\n\n<p>Magn\u00e9tisme. De nombreux types d'acier martensitique sont magn\u00e9tiques. Cela est d\u00fb \u00e0 la teneur en fer, qui conf\u00e8re \u00e0 la structure mol\u00e9culaire cristalline des propri\u00e9t\u00e9s magn\u00e9tiques. Si le magn\u00e9tisme facilite la classification du m\u00e9tal, il complique le soudage et d'autres processus de fabrication. L'acier martensitique reste magn\u00e9tique, qu'il soit \u00e0 l'\u00e9tat recuit ou tremp\u00e9.<\/p>\n\n\n\n<p>Haute r\u00e9sistance. La duret\u00e9 d\u00e9pend principalement de la teneur en carbone de la martensite. La duret\u00e9 augmente avec la teneur en carbone et atteint presque son maximum apr\u00e8s la trempe lorsque la teneur en carbone est d'environ 0,6%.<\/p>\n\n\n\n<p>Mauvaise r\u00e9sistance \u00e0 la corrosion. La raison en est que l'acier inoxydable martensitique contient moins de chrome et de nickel. Bien qu'il soit r\u00e9sistant \u00e0 la corrosion, l'acier inoxydable martensitique est moins r\u00e9sistant dans les environnements difficiles que son homologue aust\u00e9nitique.<\/p>\n\n\n\n<p>R\u00e9glable par traitement thermique. La trempe peut augmenter la duret\u00e9, tandis que le revenu r\u00e9duit la fragilit\u00e9 et am\u00e9liore la t\u00e9nacit\u00e9. En contr\u00f4lant la temp\u00e9rature et la dur\u00e9e du traitement thermique, les fabricants peuvent adapter la r\u00e9sistance, la duret\u00e9 et la t\u00e9nacit\u00e9 de l'acier.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Qu'est-ce que l'acier inoxydable ferritique ?<\/h2>\n\n\n\n<p>Lorsque le carbone se dissout dans le \u03b4-Fe, on parle de ferrite. Elle a une structure cubique centr\u00e9e sur le corps. Sa solubilit\u00e9 dans le carbone est tr\u00e8s faible, seulement 0,0008% \u00e0 temp\u00e9rature ambiante, et la solubilit\u00e9 maximale du carbone est de 0,02% \u00e0 727 \u00b0C.<\/p>\n\n\n\n<p>L'acier inoxydable ferritique a une structure cristalline cubique centr\u00e9e (BCC). Il a une teneur \u00e9lev\u00e9e en chrome, allant de 11% \u00e0 27%, mais contient peu ou pas de nickel et une faible teneur en carbone (environ 0,03%).<\/p>\n\n\n\n<p>Le sch\u00e9ma suivant illustre les principales cat\u00e9gories d'alliage de l'acier inoxydable ferritique.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/ferritic-stainless-steel-1024x576.jpg\" alt=\"acier inoxydable ferritique\" class=\"wp-image-13196\" srcset=\"https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/ferritic-stainless-steel-1024x576.jpg 1024w, https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/ferritic-stainless-steel-300x169.jpg 300w, https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/ferritic-stainless-steel-768x432.jpg 768w, https:\/\/www.sogaworks.com\/wp-content\/uploads\/2024\/10\/ferritic-stainless-steel.jpg 1280w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Propri\u00e9t\u00e9s de l'acier inoxydable ferritique<\/h3>\n\n\n\n<p>Magn\u00e9tique. Parmi les alliages composites, le chrome (Cr) est le composant qui rend l'acier inoxydable magn\u00e9tique. En revanche, le nickel (Ni) inhibe la production de ce magn\u00e9tisme. L'acier inoxydable ferritique contient du chrome comme principal composant de l'alliage et ne contient pas de nickel, il est donc magn\u00e9tique.<\/p>\n\n\n\n<p>Bonne r\u00e9sistance \u00e0 la corrosion. L'acier inoxydable ferritique contient une grande quantit\u00e9 de chrome, qui peut former une couche d'oxyde protectrice \u00e0 la surface pour emp\u00eacher la corrosion. Toutefois, sa r\u00e9sistance \u00e0 la corrosion n'est pas aussi bonne que celle de l'acier inoxydable aust\u00e9nitique. L'acier ferritique ayant une structure cubique centr\u00e9e (BCC), sa capacit\u00e9 de r\u00e9sistance \u00e0 la corrosion est l\u00e9g\u00e8rement sup\u00e9rieure \u00e0 la structure FCC de l'acier aust\u00e9nitique.<\/p>\n\n\n\n<p>Mauvaise soudabilit\u00e9. Les aciers inoxydables ferritiques ont une conductivit\u00e9 thermique plus \u00e9lev\u00e9e. Cela signifie qu'ils dissipent la chaleur plus efficacement et qu'il peut \u00eatre difficile de maintenir la chaleur n\u00e9cessaire au soudage. En outre, les aciers inoxydables ferritiques pr\u00e9sentent une ductilit\u00e9 r\u00e9duite \u00e0 basse temp\u00e9rature, et le processus de soudage implique un chauffage et un refroidissement localis\u00e9s. Ces fluctuations de temp\u00e9rature peuvent fragiliser le joint soud\u00e9 et r\u00e9duire la t\u00e9nacit\u00e9.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Comparaison : Austenite vs Martensite vs Ferrite<\/h2>\n\n\n\n<p>Enfin, nous allons utiliser un tableau pour montrer les diff\u00e9rences entre l'acier inoxydable ferritique, martensitique et aust\u00e9nitique.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Propri\u00e9t\u00e9<\/strong><\/td><td><strong>Acier inoxydable ferritique<\/strong><\/td><td><strong>Acier inoxydable martensitique<\/strong><\/td><td><strong>Acier inoxydable aust\u00e9nitique<\/strong><\/td><\/tr><tr><td><strong>Structure cristalline<\/strong><\/td><td>Cubique centr\u00e9e sur le corps (BCC)<\/td><td>Cubique centr\u00e9e sur le corps (BCC)<\/td><td>Cubique \u00e0 faces centr\u00e9es (FCC)<\/td><\/tr><tr><td><strong>Magn\u00e9tisme<\/strong><\/td><td>Magn\u00e9tique<\/td><td>Magn\u00e9tique<\/td><td>Non-magn\u00e9tique<\/td><\/tr><tr><td><strong>R\u00e9sistance \u00e0 la corrosion<\/strong><\/td><td>Mod\u00e9r\u00e9<\/td><td>Mod\u00e9r\u00e9<\/td><td>Excellent<\/td><\/tr><tr><td><strong>La force<\/strong><\/td><td>Mod\u00e9r\u00e9<\/td><td>Haut<\/td><td>Mod\u00e9r\u00e9<\/td><\/tr><tr><td><strong>Traitement thermique<\/strong><\/td><td>Ne peut \u00eatre durci par traitement thermique<\/td><td>Peut \u00eatre durci par trempe et revenu<\/td><td>Ne peut \u00eatre durci par traitement thermique<\/td><\/tr><tr><td><strong>Ductilit\u00e9<\/strong><\/td><td>Bon<\/td><td>Ductilit\u00e9 plus faible<\/td><td>Excellent<\/td><\/tr><tr><td><strong>Soudabilit\u00e9<\/strong><\/td><td>Pauvre<\/td><td>Pauvre<\/td><td>Excellent<\/td><\/tr><tr><td><strong>Conductivit\u00e9 thermique<\/strong><\/td><td>Plus \u00e9lev\u00e9<\/td><td>Mod\u00e9r\u00e9<\/td><td>Faible<\/td><\/tr><tr><td><strong>R\u00e9sistance \u00e0 la corrosion sous contrainte<\/strong><\/td><td>Haut<\/td><td>Pauvre<\/td><td>Pauvre<\/td><\/tr><tr><td><strong>Co\u00fbt<\/strong><\/td><td>Plus bas<\/td><td>Plus bas<\/td><td>Plus \u00e9lev\u00e9<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>L'acier inoxydable est un mat\u00e9riau m\u00e9tallique tr\u00e8s r\u00e9pandu dans notre vie quotidienne. Il existe en diff\u00e9rents types : aust\u00e9nitique, martensitique, ferritique, etc. Chacun d'entre eux pr\u00e9sente des propri\u00e9t\u00e9s uniques, telles que la r\u00e9sistance \u00e0 la corrosion et une grande solidit\u00e9. Il est essentiel de comprendre ce qu'ils sont et leurs diff\u00e9rences pour choisir le bon type d'acier pour diverses applications.<\/p>","protected":false},"author":1,"featured_media":13184,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[11],"tags":[],"class_list":["post-13182","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-manufacturing-materials"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Types of Stainless Steel: Austenite vs Martensite vs Ferrite<\/title>\n<meta name=\"description\" content=\"Stainless steel is a popular metallic material that is widely used in our daily life. 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