{"id":6006,"date":"2020-05-29T06:14:30","date_gmt":"2020-05-29T06:14:30","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=6006"},"modified":"2025-06-30T08:10:33","modified_gmt":"2025-06-30T08:10:33","slug":"acier-inoxydable-austenitique-riche-en-nickel-niass","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/fr\/blog\/acier-inoxydable-austenitique-riche-en-nickel-niass\/","title":{"rendered":"Acier inoxydable aust\u00e9nitique riche en nickel (NIASS)"},"content":{"rendered":"<p>Acier inoxydable aust\u00e9nitique riche en nickel. Le \"talon d'Achille\" de l'acier inoxydable aust\u00e9nitique est la tendance \u00e0 l'usure. <a href=\"https:\/\/www.kaysuns.com\/fr\/fissuration-par-corrosion-sous-contrainte-dans-lacier-inoxydable\/\" target=\"_blank\">fissuration par corrosion sous contrainte<\/a> (SCC). Mais lorsque la teneur en nickel d\u00e9passe 20%, la r\u00e9sistance \u00e0 la corrosion sous contrainte est consid\u00e9rablement am\u00e9lior\u00e9e (figure 1).<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"265\" height=\"205\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/05\/stress-corrosion-resistance.png\" alt=\"r\u00e9sistance \u00e0 la corrosion sous contrainte courbe de Copson\" class=\"wp-image-6007\"\/><figcaption class=\"wp-element-caption\">Figure 1 : courbe de Copson<\/figcaption><\/figure>\n<\/div>\n\n\n<p>L&#039;acier inoxydable aust\u00e9nitique riche en nickel (NiASS) peut \u00eatre consid\u00e9r\u00e9 comme un type distinct d&#039;acier inoxydable. En effet, lorsque la teneur en nickel de l&#039;acier inoxydable aust\u00e9nitique d\u00e9passe 30%, sa r\u00e9sistance \u00e0 la corrosion sous contrainte est comparable \u00e0 celle de l&#039;acier inoxydable duplex et de l&#039;acier inoxydable ferritique.<\/p>\n\n\n\n<p>La figure 1, la courbe de Copson montre l&#039;effet du nickel sur la r\u00e9sistance \u00e0 la contrainte seuil de corrosion sous contrainte dans les alliages fer-nickel-chrome contenant du chrome 16% \u00e0 21% (105\u00b0C, solution aqueuse de NaCl 22%). X et Y sont des superalliages allemands, et 444 est un acier inoxydable ferritique ultra-pur. Ce chiffre est redessin\u00e9 selon Speidel (1981).<\/p>\n\n\n\n<p>Le nickel est un \u00e9l\u00e9ment d&#039;alliage co\u00fbteux et n&#039;est utilis\u00e9 que lorsque cela est n\u00e9cessaire pour la performance. Cependant, dans certaines applications, lorsqu&#039;\u00e0 la fois une r\u00e9sistance \u00e0 la corrosion sous contrainte et une structure aust\u00e9nitique sont requises, le nickel est \u00e9galement essentiel.<\/p>\n\n\n\n<p>Par exemple, la r\u00e9sistance au fluage est extr\u00eamement importante dans les environnements \u00e0 haute temp\u00e9rature, o\u00f9 l&#039;acier inoxydable aust\u00e9nitique est requis. Comme pour les aciers inoxydables aust\u00e9nitiques traditionnels, en raison de sa faible \u00e9nergie de d\u00e9faut d&#039;empilement (voir Figure 2), les fronti\u00e8res doubles sont une caract\u00e9ristique distinctive des aciers inoxydables aust\u00e9nitiques riches en nickel. Le tableau 1 r\u00e9pertorie plusieurs nuances limit\u00e9es d&#039;acier inoxydable aust\u00e9nitique riche en nickel.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"631\" height=\"222\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/05\/Table-1-Nickel-rich-austenitic-stainless-steel-alloy-varieties.png\" alt=\"Vari\u00e9t\u00e9s d&#039;alliages d&#039;aciers inoxydables aust\u00e9nitiques riches en nickel\" class=\"wp-image-6008\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/05\/Table-1-Nickel-rich-austenitic-stainless-steel-alloy-varieties.png 631w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/05\/Table-1-Nickel-rich-austenitic-stainless-steel-alloy-varieties-300x106.png 300w\" sizes=\"(max-width: 631px) 100vw, 631px\" \/><figcaption class=\"wp-element-caption\">Tableau 1 : Vari\u00e9t\u00e9s d&#039;alliages d&#039;aciers inoxydables aust\u00e9nitiques riches en nickel<\/figcaption><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img decoding=\"async\" width=\"275\" height=\"199\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/05\/Figure-2-The-microstructure-of-Sanicro-28-austenitic-stainless-steel-under-an-optical-microscope-which-has-a-large-number-of-twin-boundaries.png\" alt=\"Figure 2 La microstructure de l&#039;acier inoxydable aust\u00e9nitique Sanicro 28 au microscope optique, qui a un grand nombre de fronti\u00e8res jumelles\" class=\"wp-image-6009\"\/><figcaption class=\"wp-element-caption\">Figure 2 La microstructure de l&#039;acier inoxydable aust\u00e9nitique Sanicro 28 au microscope optique, qui a un grand nombre de fronti\u00e8res jumelles<\/figcaption><\/figure>\n<\/div>\n\n\n<p><a href=\"https:\/\/www.kaysuns.com\/fr\/\" target=\"_blank\">Tubes en aciers inoxydables super aust\u00e9nitiques 254SMO et 654SMO<\/a> sont sp\u00e9cialement con\u00e7us pour l&#039;industrie p\u00e9troli\u00e8re et gazi\u00e8re. Les applications typiques sont des \u00e9quipements tels que le refroidissement \u00e0 l&#039;eau de mer, le blanchiment de la p\u00e2te et la tuyauterie hydraulique et d&#039;instruments.<\/p>\n\n\n\n<p><strong>Sanicro 25<\/strong>: Un alliage 22Cr-25Ni con\u00e7u pour les chaudi\u00e8res \u00e0 700\u00b0C et plus. En raison de sa bonne r\u00e9sistance \u00e0 la rupture par fluage et de sa r\u00e9sistance \u00e0 la corrosion \u00e0 haute temp\u00e9rature, c&#039;est un mat\u00e9riau adapt\u00e9 aux surchauffeurs et aux r\u00e9chauffeurs.<\/p>\n\n\n\n<p>En fait, Sanicro 25 a une meilleure r\u00e9sistance \u00e0 la rupture en fluage que la plupart des aciers inoxydables aust\u00e9nitiques dans la plage de 600 ~ 750 \u2103. Dans les environnements tr\u00e8s corrosifs et acides, Sanicro 28 est g\u00e9n\u00e9ralement le meilleur choix.<\/p>\n\n\n\n<p>Il est utilis\u00e9 dans le forage \u00e0 haute r\u00e9sistance avec des pipelines, des tubages et des rev\u00eatements de puits de gaz acide. D&#039;autres applications incluent les appareils de chauffage, les syst\u00e8mes de pompage, les pompes et les r\u00e9cipients dans les usines d&#039;acide par voie humide et super phosphorique.<\/p>\n\n\n\n<p><strong>Alliage polyvalent 800<\/strong>: couramment utilis\u00e9 dans un environnement de 550 ~ 1100 \u2103, de tels environnements n\u00e9cessitent des mat\u00e9riaux pr\u00e9sentant une excellente r\u00e9sistance au fluage, une bonne r\u00e9sistance \u00e0 la corrosion \u00e0 haute temp\u00e9rature et une r\u00e9sistance \u00e0 haute temp\u00e9rature. Ce type d&#039;alliage est \u00e9galement utilis\u00e9 dans l&#039;importation et l&#039;exportation d&#039;ammoniac, de m\u00e9thanol et de gaz civil, et l&#039;alliage 800 est \u00e9galement un bon choix pour les tubes de four utilis\u00e9s dans la production de chlorure de vinyle et d&#039;\u00e9thyl\u00e8ne.<\/p>\n\n\n\n<p>D&#039;autres applications incluent les tubes d&#039;\u00e9change de chaleur \u00e0 lit de combustion fluidis\u00e9, les tubes radiants et les composants du four de traitement thermique, tels que les tubes de silencieux et les manchons de protection de thermocouple.<\/p>\n\n\n\n<p>L&#039;alliage 25Cr-35Ni 353MA est con\u00e7u pour \u00eatre utilis\u00e9 dans des environnements pr\u00e9sentant des probl\u00e8mes potentiels de carburation et d&#039;absorption d&#039;azote, et convient aux fours de craquage et aux tubes de reformage qui traitent le gaz de synth\u00e8se. Bien qu&#039;il existe d&#039;autres mat\u00e9riaux alternatifs qui contiennent plus de chrome, le 353MA est optimal. L&#039;une des raisons est qu&#039;il contient de l&#039;\u00e9l\u00e9ment Ce, qui aide \u00e0 former une couche d&#039;oxyde de surface tr\u00e8s stable.<\/p>\n\n\n\n<p><strong>Alliage 69<\/strong>: nickel 60%, principalement utilis\u00e9 dans la tuyauterie des g\u00e9n\u00e9rateurs de vapeur des centrales nucl\u00e9aires (Figure 3). La temp\u00e9rature de fonctionnement est de 365\u00b0C. A cette temp\u00e9rature, la fissuration par corrosion sous contrainte entre les grains est un probl\u00e8me potentiel. Dans les conditions donn\u00e9es, l&#039;alliage 690 est \u00e0 peine corrod\u00e9, il devient donc l&#039;alliage de choix.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"547\" height=\"361\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/05\/Figure-3-Alloy-690-U-shaped-tube-ready-for-shipment-and-installation-used-in-nuclear-power-plant-steam-generators-1.png\" alt=\"Figure 3 : Tube en U en alliage 690 pr\u00eat \u00e0 \u00eatre exp\u00e9di\u00e9 et install\u00e9, utilis\u00e9 dans les g\u00e9n\u00e9rateurs de vapeur des centrales nucl\u00e9aires\" class=\"wp-image-6011\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/05\/Figure-3-Alloy-690-U-shaped-tube-ready-for-shipment-and-installation-used-in-nuclear-power-plant-steam-generators-1.png 547w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/05\/Figure-3-Alloy-690-U-shaped-tube-ready-for-shipment-and-installation-used-in-nuclear-power-plant-steam-generators-1-300x198.png 300w\" sizes=\"(max-width: 547px) 100vw, 547px\" \/><\/figure>\n<\/div>\n\n\n<p>Fait int\u00e9ressant, nous avons remarqu\u00e9 que les riches en nickel <a href=\"https:\/\/www.kaysuns.com\/fr\/duplex-2205-stainless-steel-pipe\/\" target=\"_blank\">acier inoxydable aust\u00e9nitique 254SMO<\/a> est \u00e9galement utilis\u00e9 dans la production artistique.<\/p>\n\n\n\n<p>Le \"Dieu, notre P\u00e8re, sur l'arc-en-ciel\" con\u00e7u par Carl Milles a \u00e9t\u00e9 achev\u00e9 en 1995 sur la c\u00f4te sud de Stockholm Strand (Figure 4). La sculpture mesure environ 23 m de haut. Un grand nombre de marins passent ici chaque jour. Il s'agit d'une attraction c\u00e9l\u00e8bre. L'eau de mer environnante contient des sels et les chlorures sont susceptibles de provoquer une corrosion externe. Si un acier faiblement alli\u00e9 est utilis\u00e9 pour fabriquer des arcs-en-ciel, il rouillera presque instantan\u00e9ment.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"625\" height=\"468\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/05\/Sculpture-God-our-Father-on-the-Rainbow.jpg\" alt=\"Dieu, notre P\u00e8re, sur l&#039;arc-en-ciel\" class=\"wp-image-6012\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/05\/Sculpture-God-our-Father-on-the-Rainbow.jpg 625w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/05\/Sculpture-God-our-Father-on-the-Rainbow-300x225.jpg 300w\" sizes=\"(max-width: 625px) 100vw, 625px\" \/><figcaption class=\"wp-element-caption\">Figure 4 : Dieu, notre P\u00e8re, sur l&#039;arc-en-ciel, con\u00e7u par le sculpteur su\u00e9dois Carl Milles. Ce monument de la paix vo\u00fbt\u00e9 est un bon exemple de l&#039;utilisation de l&#039;acier inoxydable aust\u00e9nitique 254SMO<\/figcaption><\/figure>\n<\/div>","protected":false},"featured_media":6012,"template":"","categories":[186],"tags":[],"class_list":["post-6006","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Nickel-Rich Austenitic Stainless Steel (NIASS) - Stainless Steel Pipe and Fittings | KAYSUNS<\/title>\n<meta name=\"description\" content=\"Nickel-Rich Austenitic Stainless Steel. 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