{"id":9009,"date":"2015-09-18T14:14:36","date_gmt":"2015-09-18T14:14:36","guid":{"rendered":"https:\/\/staging.asminternational.org\/hts-new\/results\/-\/journal_content\/56\/10192\/25784977\/NEWS\/"},"modified":"2023-02-07T04:49:35","modified_gmt":"2023-02-07T04:49:35","slug":"one-minute-mentor-tempering-powder-metallurgy-steels","status":"publish","type":"post","link":"https:\/\/www.asminternational.org\/hts\/one-minute-mentor-tempering-powder-metallurgy-steels\/","title":{"rendered":"One Minute Mentor: Tempering Powder Metallurgy Steels"},"content":{"rendered":"<p>\n\t<strong>Tempering Powder Metallurgy Steels<\/strong><\/p>\n<p>\n\tUsually, powder metallurgy steel parts having a density greater than 6.7 g\/cm<sup>3<\/sup>&nbsp;(0.242 lb\/in.<sup>3<\/sup>) should be tempered after hardening. Recommended tempering temperatures for PM parts range from 150 to 200\u00b0C (300 to 390\u00b0F) with 175\u00b0C (350\u00b0F) being common. The effect of tempering temperature on impact properties is shown in&nbsp; the graph for FL-4205 at various densities.<\/p>\n<p>\n\tTempering above 200\u00b0C results in improved toughness and fatigue properties of the hardened part, while making a compromise in tensile strength and impact resistance. However, when tempering at temperatures higher than 200\u00b0C, care should be exercised as entrapped oil can ignite.<\/p>\n<p>\n\tVolume 4D, <em>Heat Treating of Irons and Steels<\/em>&nbsp;-&gt; Heat Treating of Carbon and Low-Alloy Steels -&gt; &nbsp;Heat Treatment of Powder Metallurgy Steels&nbsp;-&gt;&nbsp;Quenching and tempering&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Usually, powder metallurgy steel parts having a density greater than 6.7 g\/cm3 (0.242 lb\/in.3) should be tempered after hardening. Recommended tempering temperatures for PM parts range from 150 to 200\u00b0C (300 to 390\u00b0F) with 175\u00b0C (350\u00b0F) being common.<\/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":[439,485,440,441,483,486,1],"tags":[],"class_list":["post-9009","post","type-post","status-publish","format-standard","hentry","category-general","category-hardness-and-hardenability","category-news","category-news-articles","category-quenching","category-tempering","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: Tempering Powder Metallurgy 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\/25784977\/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: Tempering Powder Metallurgy Steels - Heat Treating Society\" \/>\n<meta property=\"og:description\" content=\"Usually, powder metallurgy steel parts having a density greater than 6.7 g\/cm3 (0.242 lb\/in.3) should be tempered after hardening. Recommended tempering temperatures for PM parts range from 150 to 200\u00b0C (300 to 390\u00b0F) with 175\u00b0C (350\u00b0F) being common.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.asminternational.org\/hts\/results\/-\/journal_content\/56\/10192\/25784977\/NEWS\/\" \/>\n<meta property=\"og:site_name\" content=\"Heat Treating Society\" \/>\n<meta property=\"article:published_time\" content=\"2015-09-18T14:14:36+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2023-02-07T04:49:35+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\\\/25784977\\\/NEWS\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/25784977\\\/NEWS\\\/\"},\"author\":{\"name\":\"\",\"@id\":\"\"},\"headline\":\"One Minute Mentor: Tempering Powder Metallurgy Steels\",\"datePublished\":\"2015-09-18T14:14:36+00:00\",\"dateModified\":\"2023-02-07T04:49:35+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/25784977\\\/NEWS\\\/\"},\"wordCount\":143,\"publisher\":{\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/#organization\"},\"articleSection\":[\"general\",\"Hardness and Hardenability\",\"news\",\"News Articles\",\"Quenching\",\"Tempering\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/25784977\\\/NEWS\\\/\",\"url\":\"https:\\\/\\\/www.asminternational.org\\\/hts\\\/results\\\/-\\\/journal_content\\\/56\\\/10192\\\/25784977\\\/NEWS\\\/\",\"name\":\"One Minute Mentor: Tempering Powder Metallurgy Steels - 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