{"id":8825,"date":"2016-04-29T14:44:43","date_gmt":"2016-04-29T14:44:43","guid":{"rendered":"https:\/\/staging.asminternational.org\/hts-new\/results\/-\/journal_content\/56\/10192\/26284541\/NEWS\/"},"modified":"2023-02-07T04:49:21","modified_gmt":"2023-02-07T04:49:21","slug":"one-minute-mentor-effect-of-cooling-rate-on-toughness-of-mold-steels","status":"publish","type":"post","link":"https:\/\/www.asminternational.org\/hts\/one-minute-mentor-effect-of-cooling-rate-on-toughness-of-mold-steels\/","title":{"rendered":"One Minute Mentor: Effect of Cooling Rate on Toughness of Mold Steels"},"content":{"rendered":"<p>\n\tThis graph shows the effect of different cooling rates on the toughness properties (un-notched samples) of AISI 420 and the nitrogen alloyed M333 (AISI 420 Mod). The cooling parameter used is ?<sub>8\/5<\/sub>, which is the cooling time from 1470 to 930\u00b0F in seconds, divided by 100.<\/p>\n<p>\n\tBesides the general trend of falling toughness with rising cooling time, it is clearly evident that the nitrogen-alloyed steel grade M333 (420Mod), which has a lower carbon content, shows significantly higher toughness values. These can be further improved by lowering the austenitizing temperature. This behavior correlates well with the reduced tendency to form proeutectoid carbides at grain boundaries. A similar correlation can be found for the steel grades AISI 440B and, for example, the nitrogen-alloyed M340 (440Mod).<\/p>\n<p>\n\t<span style=\"line-height: 1.4;\">Volume 4D,&nbsp;<\/span><em style=\"line-height: 1.4;\">Heat Treating of Irons and Steels<\/em><span style=\"line-height: 1.4;\">&nbsp;?&nbsp;Tool Steels&nbsp;?&nbsp;Heat Treating of Mold Steels and Corrosion-Resistant Tool Steels&nbsp;?&nbsp;Recommended Heat Treating Practices&nbsp;<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>This graph shows the effect of different cooling rates on the toughness properties (un-notched samples) of AISI 420 and the nitrogen alloyed M333 (AISI 420 Mod).<\/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":[439,440,441,1],"tags":[],"class_list":["post-8825","post","type-post","status-publish","format-standard","hentry","category-general","category-news","category-news-articles","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>One Minute Mentor: Effect of Cooling Rate on Toughness of Mold Steels - Heat Treating Society<\/title>\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.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/26284541\/NEWS\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"One Minute Mentor: Effect of Cooling Rate on Toughness of Mold Steels - Heat Treating Society\" \/>\n<meta property=\"og:description\" content=\"This graph shows the effect of different cooling rates on the toughness properties (un-notched samples) of AISI 420 and the nitrogen alloyed M333 (AISI 420 Mod).\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/26284541\/NEWS\/\" \/>\n<meta property=\"og:site_name\" content=\"Heat Treating Society\" \/>\n<meta property=\"article:published_time\" content=\"2016-04-29T14:44:43+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-02-07T04:49:21+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/26284541\\\/NEWS\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/26284541\\\/NEWS\\\/\"},\"author\":{\"name\":\"\",\"@id\":\"\"},\"headline\":\"One Minute Mentor: Effect of Cooling Rate on Toughness of Mold Steels\",\"datePublished\":\"2016-04-29T14:44:43+00:00\",\"dateModified\":\"2023-02-07T04:49:21+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/26284541\\\/NEWS\\\/\"},\"wordCount\":161,\"publisher\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/#organization\"},\"articleSection\":[\"general\",\"news\",\"News Articles\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/26284541\\\/NEWS\\\/\",\"url\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/26284541\\\/NEWS\\\/\",\"name\":\"One Minute Mentor: Effect of Cooling Rate on Toughness of Mold Steels - 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