{"id":2187,"date":"2021-07-20T14:22:17","date_gmt":"2021-07-20T14:22:17","guid":{"rendered":"https:\/\/wldstainless.com\/?p=2187"},"modified":"2021-07-20T14:22:17","modified_gmt":"2021-07-20T14:22:17","slug":"austenitic-heat-resistant-stainless-steel","status":"publish","type":"post","link":"https:\/\/wldstainless.com\/fr\/austenitic-heat-resistant-stainless-steel\/","title":{"rendered":"Acier inoxydable r\u00e9sistant \u00e0 la chaleur Austenitic"},"content":{"rendered":"<p>Les t\u00f4les inoxydables 309 et 310 sont des aciers aust\u00e9nitiques r\u00e9sistants \u00e0 la chaleur, caract\u00e9ris\u00e9s par une teneur \u00e9lev\u00e9e en Cr et en Ni. Les versions 309S et 310S sont respectivement des versions \u00e0 faible teneur en carbone. Dans les milieux oxydants, ils pr\u00e9sentent une excellente r\u00e9sistance \u00e0 la corrosion et une r\u00e9sistance \u00e0 hautes temp\u00e9ratures. \u00c0 temp\u00e9rature ambiante, la microstructure de la matrice de l\u2019acier inoxydable aust\u00e9nitique 310 est pure \u03b3. 310 est \u00e9galement connu sous le nom d\u2019acier inoxydable 2520 car il contient respectivement 25% de chrome et 20% de nickel. 310S et 309S ne sont pas faciles \u00e0 oxyder \u00e0 haute temp\u00e9rature et sont g\u00e9n\u00e9ralement utilis\u00e9s comme grades de r\u00e9sistance \u00e0 hautes temp\u00e9ratures. Les r\u00e9sultats exp\u00e9rimentaux montrent que le taux d\u2019oxydation de 310 est lent lorsque la temp\u00e9rature est inf\u00e9rieure \u00e0 1000 \u00b0C. Alors que la temp\u00e9rature continue d\u2019augmenter jusqu\u2019\u00e0 1200 \u00b0C, le taux d\u2019oxydation du 310 s\u2019acc\u00e9l\u00e8re rapidement. En outre, ils sont \u00e9galement utilis\u00e9s dans le transport et le stockage d\u2019acides forts tels que l\u2019acide nitrique \u00e0 une concentration de 65% \u00e0 85%.<\/p>\n<p>&nbsp;<\/p>\n<p>Mat\u00e9riau alternatif dans d'autres normes :<\/p>\n<p>JIS G4303 SUS 309S, SUS 310S<\/p>\n<p>EN 10088-1 X12CrNi23-13\/ 1.4833, X15CrNiSi25-21\/ 1.4841, X8CrNi25-21\/ 1.4845<\/p>\n<p>&nbsp;<\/p>\n<p>Composition chimique<\/p>\n<table>\n<tbody>\n<tr>\n<td>ASTM<\/td>\n<td>309<\/td>\n<td>309S<\/td>\n<td>310<\/td>\n<td>310S<\/td>\n<\/tr>\n<tr>\n<td>C<\/td>\n<td>\u22640.20<\/td>\n<td>\u22640.08<\/td>\n<td>\u22640.25<\/td>\n<td>\u22640.08<\/td>\n<\/tr>\n<tr>\n<td>Oui<\/td>\n<td>\u22641.00<\/td>\n<td>\u22641.00<\/td>\n<td>\u22641.50<\/td>\n<td>\u22641.50<\/td>\n<\/tr>\n<tr>\n<td>Mn<\/td>\n<td>\u22642.00<\/td>\n<td>\u22642.00<\/td>\n<td>\u22642.00<\/td>\n<td>\u22642.00<\/td>\n<\/tr>\n<tr>\n<td>P<\/td>\n<td>\u22640.045<\/td>\n<td>\u22640.045<\/td>\n<td>\u22640.045<\/td>\n<td>\u22640.045<\/td>\n<\/tr>\n<tr>\n<td>S<\/td>\n<td>\u22640.030<\/td>\n<td>\u22640.030<\/td>\n<td>\u22640.030<\/td>\n<td>\u22640.030<\/td>\n<\/tr>\n<tr>\n<td>Cr<\/td>\n<td>22.00~24.00<\/td>\n<td>22.00~24.00<\/td>\n<td>24.00~26.00<\/td>\n<td>24.00~26.00<\/td>\n<\/tr>\n<tr>\n<td>Ni<\/td>\n<td>12.00~15.00<\/td>\n<td>12.00~15.00<\/td>\n<td>19.00~22.00<\/td>\n<td>19.00~22.00<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Dans des conditions de haute temp\u00e9rature, l\u2019acier inoxydable r\u00e9sistant \u00e0 la chaleur 310 peut maintenir sa performance stable et ne pas se corroder ou oxyder facilement par l\u2019ext\u00e9rieur. Cela est principalement d\u00fb \u00e0 la forte teneur en Cr de l\u2019acier inoxydable 310 lui-m\u00eame ; le Cr m\u00e9tallique peut se combiner avec l\u2019oxyg\u00e8ne pour former une couche d\u2019oxyde Cr2O3 qui recouvre constamment la surface de l\u2019acier 310 jusqu\u2019\u00e0 ce que tout le colis, \u00e9quivalent \u00e0 un acier 310 recouvert d\u2019une \u00ab tenue protectrice \u00bb, emp\u00eache le contact interne de l\u2019acier 310 avec le monde ext\u00e9rieur. C\u2019est la raison principale pour laquelle l\u2019acier 310 peut pr\u00e9senter une bonne r\u00e9sistance \u00e0 l\u2019oxydation \u00e0 haute temp\u00e9rature.<\/p>\n<p>Pour l\u2019acier inoxydable r\u00e9sistant \u00e0 la chaleur, l\u2019\u00e9l\u00e9ment chrome (Cr) est stable \u00e0 haute temp\u00e9rature, ne se produit pas d\u2019oxydation et ne se d\u00e9tache pas. Mais la teneur en Cr ne doit pas \u00eatre trop \u00e9lev\u00e9e, sinon la duret\u00e9 de l\u2019acier inoxydable diminuera \u00e9galement car le Cr peut favoriser l\u2019apparition de la composition \u03b1 et inhiber celle de \u03b3. Trop de \u03b1 peut facilement conduire \u00e0 la formation de phases fragiles. Par cons\u00e9quent, dans l\u2019acier inoxydable aust\u00e9nitique, nous esp\u00e9rons que la teneur en Cr reste mod\u00e9r\u00e9e, ce qui non seulement garantit les performances du mat\u00e9riau dans tous les domaines mais \u00e9galement emp\u00eache l\u2019apparition de certaines phases fragiles.<\/p>\n<p>Le nickel est un \u00e9l\u00e9ment tr\u00e8s important dans l\u2019acier inoxydable aust\u00e9nitique r\u00e9sistant \u00e0 la chaleur et joue un r\u00f4le actif dans la promotion de la formation du \u03b3. L\u2019augmentation de la teneur en Ni peut rendre la transition de la phase \u03b3 \u00e0 la phase \u03b1 tr\u00e8s faible, ce qui peut am\u00e9liorer la stabilit\u00e9 de la matrice aust\u00e9nitique. En outre, un taux de nickel appropri\u00e9 peut nettement am\u00e9liorer les propri\u00e9t\u00e9s m\u00e9caniques globales et les bonnes propri\u00e9t\u00e9s de soudage de l\u2019acier inoxydable.<\/p>","protected":false},"excerpt":{"rendered":"<p>309 and 310 stainless sheets of steel are heat-resistant austenitic steels characterized by high Cr and Ni content. 309S and 310S are their low carbon versions respectively. In oxidizing media, they both have excellent corrosion resistance and high-temperature strength. At room temperature, the matrix microstructure of austenitic stainless steel 310 is pure \u03b3. 310 is [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"class_list":["post-2187","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"309S and 310S are their low carbon versions respectively. 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