{"id":6039,"date":"2020-06-05T07:01:40","date_gmt":"2020-06-05T07:01:40","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=6039"},"modified":"2025-12-25T03:57:00","modified_gmt":"2025-12-25T03:57:00","slug":"quest-ce-que-lacier-inoxydable-super-duplex","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/fr\/blog\/what-is-super-duplex-stainless-steel\/","title":{"rendered":"Qu&#039;est-ce que l&#039;acier inoxydable Super Duplex\u00a0?"},"content":{"rendered":"<p class=\"wp-block-paragraph\">L'acier inoxydable super duplex fait r\u00e9f\u00e9rence \u00e0 l'acier duplex avec PREN&gt;40, contenant 25% Cr et une teneur \u00e9lev\u00e9e en chrome. <a href=\"https:\/\/www.kaysuns.com\/fr\/role-du-molybdene-dans-les-tubes-et-raccords-en-acier-inoxydable\/\" target=\"_blank\">molybd\u00e8ne<\/a> (&gt;3.5%), haute teneur en azote (0.22%~0.30%), les principaux grades sont UNS S32550 (UR52N+), <a href=\"https:\/\/www.kaysuns.com\/fr\/quest-ce-que-lacier-inoxydable-2507-super-duplex\/\" target=\"_blank\">S32750 (SAF 2507)<\/a> Et S32760 (Zeron 100) ont \u00e9t\u00e9 d\u00e9velopp\u00e9s par des soci\u00e9t\u00e9s telles que la CLI fran\u00e7aise, la SANDVIK su\u00e9doise et la MATER+PLATT britannique.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Leurs mat\u00e9riaux d\u00e9form\u00e9s sont sortis vers 1990 et 1991 et sont entr\u00e9s sur le march\u00e9 ces derni\u00e8res ann\u00e9es. La composition de ces trois aciers est similaire, la diff\u00e9rence est la teneur en tungst\u00e8ne et en cuivre.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"658\" height=\"548\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/06\/duplex-seamless-pipes.jpg\" alt=\"Tuyaux sans soudure UNS S32750\" class=\"wp-image-6041\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/06\/duplex-seamless-pipes.jpg 658w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/06\/duplex-seamless-pipes-300x250.jpg 300w\" sizes=\"(max-width: 658px) 100vw, 658px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Depuis le d\u00e9but des ann\u00e9es 2000, le d\u00e9veloppement de l&#039;acier inoxydable duplex moderne a montr\u00e9 deux grandes tendances :<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tout d&#039;abord, tout en faisant attention \u00e0 la stabilit\u00e9 thermique de la structure de l&#039;acier, augmentez encore la teneur en chrome, molybd\u00e8ne et azote dans l&#039;acier pour obtenir une r\u00e9sistance plus \u00e9lev\u00e9e et une meilleure r\u00e9sistance \u00e0 la corrosion, pour r\u00e9pondre aux besoins du d\u00e9veloppement industriel moderne et faciliter le concurrence entre les aciers inoxydables aust\u00e9nitiques et l&#039;\u00e9mergence des aciers inoxydables super-duplex avec des valeurs PRE proches de 50, comme le SAF 2707 HD et le SAF 3207 HD.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La seconde est de se tourner vers le d\u00e9veloppement d&#039;acier inoxydable duplex \u00e9conomique \u00e0 faible teneur en nickel et sans \u00e9l\u00e9ment pr\u00e9cieux molybd\u00e8ne ou seulement une petite quantit\u00e9 de molybd\u00e8ne pour r\u00e9duire le co\u00fbt de production et le prix de vente de l&#039;acier inoxydable duplex et am\u00e9liorer l&#039;ouvrabilit\u00e9 \u00e0 chaud et la soudabilit\u00e9 du duplex acier inoxydable. Cela augmentera la comp\u00e9titivit\u00e9 de l&#039;acier inoxydable duplex et d&#039;autres types d&#039;acier inoxydable \u00e0 usage g\u00e9n\u00e9ral, en particulier les aciers inoxydables aust\u00e9nitiques au chrome-nickel 304 et 316.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Il existe d\u00e9j\u00e0 des marques ant\u00e9rieures SAF 2304 et AL 2003, LDX2101, Armo Nitronic 19D, ATI 2102, 2201, 2202, LDX2404 et d&#039;autres marques qui ne sont disponibles que depuis 2000. La production en s\u00e9rie et l&#039;application d&#039;acier inoxydable duplex \u00e9conomique ont eu un impact \u00e9norme sur la survie et le d\u00e9veloppement de l&#039;acier inoxydable duplex 3RE60 de premi\u00e8re g\u00e9n\u00e9ration de type 18Cr (contenant environ 3% de molybd\u00e8ne).<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Quel grade est le plus couramment utilis\u00e9 ?<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u00c0 l&#039;heure actuelle, les principales qualit\u00e9s d&#039;acier inoxydable super duplex en Chine sont l&#039;acier inoxydable duplex 2507 (S32750) et 2507 (UNS S32750), qui pr\u00e9sente une r\u00e9sistance \u00e9lev\u00e9e et une r\u00e9sistance \u00e0 la corrosion, et est principalement utilis\u00e9 dans le traitement chimique, l&#039;industrie p\u00e9trochimique et les \u00e9quipements sous-marins.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ils ont une forte r\u00e9sistance \u00e0 la corrosion du chlorure, une conductivit\u00e9 thermique plus \u00e9lev\u00e9e et un coefficient de dilatation thermique plus faible. Avec une teneur plus \u00e9lev\u00e9e en chrome, molybd\u00e8ne et azote, il pr\u00e9sente une r\u00e9sistance \u00e9lev\u00e9e \u00e0 la corrosion par piq\u00fbres, \u00e0 la corrosion caverneuse et \u00e0 la corrosion g\u00e9n\u00e9rale.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La r\u00e9sistance aux chocs est \u00e9galement tr\u00e8s \u00e9lev\u00e9e, l&#039;alliage 2507 ne convient pas \u00e0 une utilisation dans un environnement \u00e0 temp\u00e9rature sup\u00e9rieure \u00e0 570 , une exposition \u00e0 long terme \u00e0 un tel environnement, sa t\u00e9nacit\u00e9 sera r\u00e9duite.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Applications<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Couramment utilis\u00e9 dans les environnements chimiques sp\u00e9ciaux tels que les plates-formes p\u00e9troli\u00e8res offshore (tubes d&#039;\u00e9changeur de chaleur, syst\u00e8mes de traitement de l&#039;eau et d&#039;approvisionnement en eau, syst\u00e8mes de protection contre l&#039;incendie, syst\u00e8mes de gicleurs, syst\u00e8mes de stabilisation de l&#039;eau), \u00e9quipements de dessalement (dessalement) (conduites haute pression dans les \u00e9quipements Ro, conduites d&#039;eau de mer ), etc. Dans l&#039;appareil. Nom S32750, SAF2507, F53, norme nationale 00Cr25Ni7Mo4N.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Domaines d&#039;application : \u00e9quipement de l&#039;industrie p\u00e9troli\u00e8re et gazi\u00e8re ; plates-formes offshore, \u00e9changeurs de chaleur, \u00e9quipements sous-marins, \u00e9quipements de lutte contre l&#039;incendie ; industrie de transformation chimique, ustensiles et industrie des pipelines; usines de dessalement, pipelines sous-marins; composants m\u00e9caniques (composants \u00e0 haute r\u00e9sistance et r\u00e9sistant \u00e0 la corrosion), syst\u00e8me FGD de l&#039;industrie \u00e9nerg\u00e9tique, syst\u00e8me de lavage industriel, tour d&#039;absorption, etc.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Vous voudrez peut-\u00eatre aussi lire :<br \/><a href=\"https:\/\/www.kaysuns.com\/fr\/problemes-courants-lies-a-lutilisation-du-super-duplex\/\" target=\"_blank\">Probl\u00e8mes courants li\u00e9s \u00e0 l'utilisation du Super Duplex<\/a><\/p>","protected":false},"featured_media":6041,"template":"","categories":[186],"tags":[],"class_list":["post-6039","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What Is Super Duplex Stainless Steel? - Duplex Pipe Kaysuns<\/title>\n<meta name=\"description\" content=\"Super duplex stainless steel refers to duplex steel with PREN&gt;40, containing 25% Cr and high molybdenum (&gt;3.5%), high nitrogen (0.22%~0.30%)...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.kaysuns.com\/fr\/blog\/quest-ce-que-lacier-inoxydable-super-duplex\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What Is Super Duplex Stainless Steel? - Duplex Pipe Kaysuns\" \/>\n<meta property=\"og:description\" content=\"Super duplex stainless steel refers to duplex steel with PREN&gt;40, containing 25% Cr and high molybdenum (&gt;3.5%), high nitrogen (0.22%~0.30%)...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.kaysuns.com\/fr\/blog\/quest-ce-que-lacier-inoxydable-super-duplex\/\" \/>\n<meta property=\"og:site_name\" content=\"Stainless Steel Pipe and Fittings | KAYSUNS\" \/>\n<meta property=\"article:modified_time\" content=\"2025-12-25T03:57:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/06\/duplex-seamless-pipes.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"658\" \/>\n\t<meta property=\"og:image:height\" content=\"548\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.kaysuns.com\\\/blog\\\/what-is-super-duplex-stainless-steel\\\/\",\"url\":\"https:\\\/\\\/www.kaysuns.com\\\/blog\\\/what-is-super-duplex-stainless-steel\\\/\",\"name\":\"What Is Super Duplex Stainless Steel? 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