{"id":7722,"date":"2026-03-16T11:17:53","date_gmt":"2026-03-16T03:17:53","guid":{"rendered":"http:\/\/www.camcjsw-testmachines.com\/?p=7722"},"modified":"2026-03-19T10:13:25","modified_gmt":"2026-03-19T02:13:25","slug":"industry-standard-plastics-astm-d648","status":"publish","type":"post","link":"http:\/\/www.camcjsw-testmachines.com\/es\/industry-standard-plastics-astm-d648\/","title":{"rendered":"Industry Standard &#8211; Plastics &#8211; ASTM D648"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"7722\" class=\"elementor elementor-7722\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ae57171 e-flex e-con-boxed e-con e-parent\" data-id=\"ae57171\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9ee51ee elementor-widget elementor-widget-heading\" data-id=\"9ee51ee\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.22.0 - 26-06-2024 *\/\n.elementor-heading-title{padding:0;margin:0;line-height:1}.elementor-widget-heading .elementor-heading-title[class*=elementor-size-]>a{color:inherit;font-size:inherit;line-height:inherit}.elementor-widget-heading .elementor-heading-title.elementor-size-small{font-size:15px}.elementor-widget-heading .elementor-heading-title.elementor-size-medium{font-size:19px}.elementor-widget-heading .elementor-heading-title.elementor-size-large{font-size:29px}.elementor-widget-heading .elementor-heading-title.elementor-size-xl{font-size:39px}.elementor-widget-heading .elementor-heading-title.elementor-size-xxl{font-size:59px}<\/style><h4 class=\"elementor-heading-title elementor-size-default\">ASTM D648 for Deflection Temperature of Plastics<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-402723f elementor-widget elementor-widget-text-editor\" data-id=\"402723f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<style>\/*! elementor - v3.22.0 - 26-06-2024 *\/\n.elementor-widget-text-editor.elementor-drop-cap-view-stacked .elementor-drop-cap{background-color:#69727d;color:#fff}.elementor-widget-text-editor.elementor-drop-cap-view-framed .elementor-drop-cap{color:#69727d;border:3px solid;background-color:transparent}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap{margin-top:8px}.elementor-widget-text-editor:not(.elementor-drop-cap-view-default) .elementor-drop-cap-letter{width:1em;height:1em}.elementor-widget-text-editor .elementor-drop-cap{float:left;text-align:center;line-height:1;font-size:50px}.elementor-widget-text-editor .elementor-drop-cap-letter{display:inline-block}<\/style>\t\t\t\t<p>The heat deflection temperature (HDT)\u00a0describes the temperature at which a plastic material starts to deform under a predetermined load. This value is used in materials testing to evaluate the thermal resistance of a material. It\u00a0is measured by subjecting a defined specimen to an increasing temperature under constant load in a 3-point bending process until a defined deflection is reached.\u00a0Both\u00a0ASTM D648 and ISO 75 standards describe the test procedure and regulate the requirements for the test equipment and test conditions, such as load, specimen geometry and heating rate\u00a0to achieve internationally comparable results.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-21a63c9 e-flex e-con-boxed e-con e-parent\" data-id=\"21a63c9\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0cd2597 elementor-widget elementor-widget-heading\" data-id=\"0cd2597\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">APLICACI\u00d3N<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bf30704 elementor-widget elementor-widget-text-editor\" data-id=\"bf30704\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><strong><b>Material selection &amp; comparison<\/b><\/strong><\/p><p>Rank plastics, composites, and thermosets by their ability to resist bending under heat &amp;\u00a0load.<\/p><p>Guide choices for parts exposed to elevated temperatures (automotive, electronics, appliances).<\/p><p><strong><b>Product design &amp; engineering<\/b><\/strong><\/p><p>Set upper temperature limits for structural components under service loads.<\/p><p>Predict dimensional stability in hot environments (engine covers, circuit boards,\u00a0kitchenware).<\/p><p><strong><b>Manufacturing optimization<\/b><\/strong><\/p><p>Determine safe ejection temperatures for injection\u00a0molded parts (cool to near\/\u00a0below HDT to avoid post\u00a0mold warping).<\/p><p>Optimize cooling cycles and mold design for production efficiency.<\/p><p><strong><b>Quality control &amp; R&amp;D<\/b><\/strong><\/p><p>Verify material consistency and formulation performance.<\/p><p>Evaluate effects of fillers, reinforcements, and additives on heat resistance.<\/p><p>In short, HDT is essential for designing durable, heat\u001eresistant plastic components and ensuring they perform safely in real\u001eworld thermal\u001emechanical conditions.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b328ee4 elementor-widget elementor-widget-heading\" data-id=\"b328ee4\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Test methods<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3cb9452 elementor-widget elementor-widget-text-editor\" data-id=\"3cb9452\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>ASTM D648 contains the standard test method for the heat deflection temperature of plastics under flexural load in the edgewise position of the specimen. Two test methods are determined based on the support span (separation of the lines of contact between specimen and supports):<\/p><p>Method A: 101.6 \u00b1 0.5 mm<\/p><p>Method B: 100.0 \u00b1 0.5 mm<\/p><p>Regardless of the method, constant flexural stress of 0.455MPa or 1.82MPa must be applied.<br \/><img decoding=\"async\" src=\"http:\/\/www.camcjsw-testmachines.com\/wp-content\/uploads\/2026\/03\/ASTM-D648-1.webp\" alt=\"http:\/\/www.camcjsw-testmachines.com\/wp-content\/uploads\/2026\/03\/ASTM-D648-1.webp\" \/><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-34827dd e-flex e-con-boxed e-con e-parent\" data-id=\"34827dd\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cb397d0 elementor-widget elementor-widget-heading\" data-id=\"cb397d0\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Specimens to ASTM D648\u00a0<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b4f0ebf elementor-widget elementor-widget-text-editor\" data-id=\"b4f0ebf\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<table><tbody><tr><td width=\"122\"><p>Alignment<\/p><\/td><td width=\"226\"><p>Edgewise position<\/p><\/td><\/tr><tr><td width=\"122\"><p>Injection-molded<\/p><\/td><td width=\"226\"><p>Min. length: support span +12.7 mm<\/p><p>Width: 3~13 mm<\/p><p>Thickness: 12.7 \u00b1 0.5 mm<\/p><\/td><\/tr><tr><td width=\"122\"><p>Components<\/p><\/td><td width=\"226\"><p>Thickness: \u22653mm<\/p><\/td><\/tr><tr><td width=\"122\"><p>QTY<\/p><\/td><td width=\"226\"><p>\u22652pcs<\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7493abb elementor-widget elementor-widget-heading\" data-id=\"7493abb\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Test requirements to ASTM D648\u00a0<\/h4>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-042d12e elementor-widget elementor-widget-text-editor\" data-id=\"042d12e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<table><tbody><tr><td width=\"122\"><p>Test fixture<\/p><\/td><td width=\"326\"><p>Support radius:<\/p><p>l\u00a03 \u00b1\u00a00.2\u00a0mm;<\/p><p>Support span:<\/p><p>l\u00a0Method A: 101.6 \u00b1 0.5\u00a0mm<br \/>Method B: 100.0 \u00b1\u00a00.5\u00a0mm;<\/p><p>Flexural stress:<\/p><p>l\u00a01.82MPa<\/p><p>l\u00a00.455MPa<\/p><\/td><\/tr><tr><td width=\"122\"><p>Temperature<\/p><\/td><td width=\"326\"><p>Starting temperature:<\/p><p>l\u00a0Room\u00a0temperature;<\/p><p>Rate of temperature increase:<\/p><p>l\u00a02 \u00b1 0.2 \u00b0C\/min<br \/>10 \u00b1 1 \u00b0C\/5 min<br \/>120 \u00b1 12 \u00b0C\/h;<\/p><p>Thermometer position:<\/p><p>l\u00a0No further than 10 mm from the specimen,\u00a0without touching it<\/p><\/td><\/tr><tr><td width=\"122\"><p>Results<\/p><\/td><td width=\"326\"><p>Standard deflection: 0.25mm<\/p><\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>ASTM D648 for Deflection Temperature of Plastics The heat deflection temperature (HDT)\u00a0describes the temperature at which a plastic material starts to deform under a predetermined load. This value is used in materials testing to evaluate the thermal resistance of a material. It\u00a0is measured by subjecting a defined specimen to an increasing temperature under constant load [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[41],"tags":[],"class_list":["post-7722","post","type-post","status-publish","format-standard","hentry","category-application"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.5 (Yoast SEO v22.9) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\r\n<title>Industry Standard - Plastics - ASTM D648 - SINOTEST, a brand of JIANGSU WALLONG-HSIN MACHINERY ENGINEERING CORPORATION LTD<\/title>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"http:\/\/www.camcjsw-testmachines.com\/es\/industry-standard-plastics-astm-d648\/\" \/>\r\n<meta property=\"og:locale\" content=\"es_ES\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"Industry Standard - Plastics - ASTM D648\" \/>\r\n<meta property=\"og:description\" content=\"ASTM D648 for Deflection Temperature of Plastics The heat deflection temperature (HDT)\u00a0describes the temperature at which a plastic material starts to deform under a predetermined load. 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