{"id":8726,"date":"2016-09-16T16:25:49","date_gmt":"2016-09-16T16:25:49","guid":{"rendered":"https:\/\/staging.asminternational.org\/hts-new\/results\/-\/journal_content\/56\/10192\/26806895\/NEWS\/"},"modified":"2023-02-07T04:49:13","modified_gmt":"2023-02-07T04:49:13","slug":"one-minute-mentor-martensitic-stainless-steels","status":"publish","type":"post","link":"https:\/\/www.asminternational.org\/hts\/one-minute-mentor-martensitic-stainless-steels\/","title":{"rendered":"One Minute Mentor: Martensitic Stainless Steels"},"content":{"rendered":"<p>\n\tA stainless martensitic alloy should have the following characteristics:<\/p>\n<ul>\n<li>\n\t\tIt must have at least 10.5% chromium to qualify as stainless, and even more for better corrosion resistance.<\/li>\n<li>\n\t\tIt should be fully austenitic at some temperature.<\/li>\n<li>\n\t\tThe temperature at which austenite forms on heating should be sufficiently high to permit tempering above the temper embrittlement range.<\/li>\n<\/ul>\n<p>\n\tThese criteria are somewhat challenging to meet. &nbsp;The two graphs show iron-chromium phase diagrams at two low-carbon levels.<\/p>\n<p>\n\tThe figure on the left shows that at low-carbon (0.05%) levels, austenite is stable up to about 12% chromium, above which some ?-ferrite tends to be stable at all temperatures below the melting point.<\/p>\n<p>\n\tIncreasing carbon slightly, to 0.1%, shown on the right, expands the chromium level at which the steel becomes fully&nbsp; austenite.<\/p>\n<p>\n\t<span style=\"line-height: 1.4;\">Volume 4D, <em>Heat Treating of Irons and Steels<\/em><\/span><span style=\"line-height: 1.4;\">&nbsp;<\/span><span style=\"line-height: 1.4;\">?<\/span><span style=\"line-height: 1.4;\">&nbsp;Heat Treated High-Alloy Steels&nbsp;<\/span><span style=\"line-height: 1.4;\">?<\/span><span style=\"line-height: 1.4;\">&nbsp;<\/span><span style=\"line-height: 1.4;\">Heat Treating of Martensitic Stainless Steels<\/span><span style=\"line-height: 1.4;\">&nbsp;<\/span><span style=\"line-height: 1.4;\">?<\/span><span style=\"line-height: 1.4;\">&nbsp;Alloying<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A stainless martensitic alloy should have the following characteristics:<br \/>\n\u2022\tIt must have at least 10.5% chromium to qualify as stainless, and even more for better corrosion resistance.<br \/>\n\u2022\tIt should be fully austenitic at some temperature.<br \/>\n\u2022\tThe temperature at which austenite forms on heating should be sufficiently high to permit tempering above the temper embrittlement range.<\/p>\n","protected":false},"author":63082,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[439,454,440,441,477,1],"tags":[],"class_list":["post-8726","post","type-post","status-publish","format-standard","hentry","category-general","category-metals-and-alloys","category-news","category-news-articles","category-phase-diagrams-and-crystallography","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - 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