{"id":5207,"date":"2024-03-25T17:58:41","date_gmt":"2024-03-25T16:58:41","guid":{"rendered":"https:\/\/web.castfast.com\/2024\/03\/25\/which-material-for-iron-casting-with-3d-sand-printing\/"},"modified":"2025-05-26T11:51:00","modified_gmt":"2025-05-26T09:51:00","slug":"which-material-for-iron-casting-with-3d-sand-printing","status":"publish","type":"post","link":"https:\/\/www.castfast.com\/en\/2024\/03\/25\/which-material-for-iron-casting-with-3d-sand-printing\/","title":{"rendered":"Which material for iron casting with 3D sand printing?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"5207\" class=\"elementor elementor-5207 elementor-1364\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e26f9fb e-con-full e-flex e-con e-parent\" data-id=\"e26f9fb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-cdc031f elementor-widget__width-inherit elementor-widget elementor-widget-theme-post-featured-image elementor-widget-image\" data-id=\"cdc031f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"theme-post-featured-image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/www.castfast.com\/wp-content\/uploads\/2024\/05\/Untitled_1.36.1-scaled-1-jpg.webp\" class=\"attachment-full size-full wp-image-4922 not-transparent\" alt=\"\" srcset=\"https:\/\/www.castfast.com\/wp-content\/uploads\/2024\/05\/Untitled_1.36.1-scaled-1-jpg.webp 1920w, https:\/\/www.castfast.com\/wp-content\/uploads\/2024\/05\/Untitled_1.36.1-scaled-1-300x169.webp 300w, https:\/\/www.castfast.com\/wp-content\/uploads\/2024\/05\/Untitled_1.36.1-scaled-1-1024x576.webp 1024w, https:\/\/www.castfast.com\/wp-content\/uploads\/2024\/05\/Untitled_1.36.1-scaled-1-768x432.webp 768w, https:\/\/www.castfast.com\/wp-content\/uploads\/2024\/05\/Untitled_1.36.1-scaled-1-1536x864.webp 1536w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" data-has-transparency=\"false\" data-dominant-color=\"aa9277\" style=\"--dominant-color: #aa9277\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6542956 e-con-full e-flex e-con e-child\" data-id=\"6542956\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-36161e8 e-con-full e-flex e-con e-child\" data-id=\"36161e8\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-74b0da0 elementor-widget elementor-widget-theme-post-title elementor-page-title elementor-widget-heading\" data-id=\"74b0da0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"theme-post-title.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Which material for iron casting with 3D sand printing?<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-febf211 elementor-align-center elementor-widget elementor-widget-post-info\" data-id=\"febf211\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"post-info.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<ul class=\"elementor-inline-items elementor-icon-list-items elementor-post-info\">\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-7f530f1 elementor-inline-item\" itemprop=\"datePublished\">\n\t\t\t\t\t\t<a href=\"https:\/\/www.castfast.com\/en\/2024\/03\/25\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-date\">\n\t\t\t\t\t\t\t\t\t\t<time>March 25, 2024<\/time>\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-6863c75 elementor-inline-item\" itemprop=\"author\">\n\t\t\t\t\t\t<a href=\"https:\/\/www.castfast.com\/en\/author\/marcel\/\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-author\">\n\t\t\t\t\t\t\t\t\t\tMarcel Tschillaev\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-3994668 elementor-inline-item\" itemprop=\"about\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"32\" height=\"32\" viewBox=\"0 0 32 32\" fill=\"none\"><g clip-path=\"url(#clip0_2583_9867)\"><path d=\"M29.4189 1.30371H18.5566C18.1515 1.3037 17.7503 1.38348 17.3761 1.5385C17.0018 1.69352 16.6617 1.92074 16.3752 2.2072L1.75713 16.8253C1.6137 16.9685 1.49991 17.1387 1.42228 17.3259C1.34465 17.5132 1.30469 17.7139 1.30469 17.9166C1.30469 18.1193 1.34465 18.3201 1.42228 18.5073C1.49991 18.6946 1.6137 18.8647 1.75713 19.008L12.9926 30.2434C13.1358 30.3868 13.3059 30.5006 13.4932 30.5783C13.6805 30.6559 13.8812 30.6959 14.0839 30.6959C14.2866 30.6959 14.4874 30.6559 14.6746 30.5783C14.8619 30.5006 15.032 30.3868 15.1753 30.2434L29.7933 15.6253C30.0799 15.3389 30.3072 14.9989 30.4622 14.6246C30.6173 14.2503 30.697 13.8491 30.6968 13.4439V2.58163C30.6968 2.2427 30.5622 1.91766 30.3225 1.678C30.0829 1.43835 29.7578 1.30371 29.4189 1.30371ZM24.9462 8.97121C24.5671 8.97121 24.1965 8.85879 23.8812 8.64816C23.566 8.43753 23.3203 8.13816 23.1752 7.78789C23.0302 7.43763 22.9922 7.05221 23.0662 6.68037C23.1401 6.30853 23.3227 5.96698 23.5908 5.6989C23.8588 5.43082 24.2004 5.24826 24.5722 5.17429C24.9441 5.10033 25.3295 5.13829 25.6798 5.28337C26.03 5.42846 26.3294 5.67415 26.54 5.98938C26.7507 6.30461 26.8631 6.67521 26.8631 7.05434C26.8631 7.30606 26.8135 7.55533 26.7172 7.78789C26.6208 8.02046 26.4796 8.23177 26.3016 8.40977C26.1236 8.58777 25.9123 8.72897 25.6798 8.8253C25.4472 8.92163 25.1979 8.97121 24.9462 8.97121Z\" fill=\"#F9FAFB\"><\/path><path d=\"M29.4189 1.30371H18.5566C18.1515 1.3037 17.7503 1.38348 17.3761 1.5385C17.0018 1.69352 16.6617 1.92074 16.3752 2.2072L1.75713 16.8253C1.6137 16.9685 1.49991 17.1387 1.42228 17.3259C1.34465 17.5132 1.30469 17.7139 1.30469 17.9166C1.30469 18.1193 1.34465 18.3201 1.42228 18.5073C1.49991 18.6946 1.6137 18.8647 1.75713 19.008L7.43874 24.6896L23.6683 8.47155C23.4713 8.29928 23.3118 8.08839 23.1997 7.85195C23.0876 7.61551 23.0253 7.35856 23.0166 7.09704C23.0079 6.83551 23.053 6.57499 23.1491 6.33161C23.2452 6.08824 23.3903 5.86721 23.5754 5.68223C23.7605 5.49724 23.9816 5.35225 24.225 5.25623C24.4684 5.16022 24.729 5.11524 24.9905 5.12407C25.252 5.1329 25.5089 5.19536 25.7453 5.30757C25.9817 5.41979 26.1925 5.57937 26.3647 5.77642L30.3786 1.75993C30.2614 1.61877 30.1148 1.50484 29.949 1.42606C29.7833 1.34727 29.6024 1.30552 29.4189 1.30371Z\" fill=\"#A0ABC0\"><\/path><path d=\"M29.4189 1.30371H18.5566C18.1515 1.3037 17.7503 1.38348 17.3761 1.5385C17.0018 1.69352 16.6617 1.92074 16.3752 2.2072L1.75713 16.8253C1.6137 16.9685 1.49991 17.1387 1.42228 17.3259C1.34465 17.5132 1.30469 17.7139 1.30469 17.9166C1.30469 18.1193 1.34465 18.3201 1.42228 18.5073C1.49991 18.6946 1.6137 18.8647 1.75713 19.008L12.9926 30.2434C13.1358 30.3868 13.3059 30.5006 13.4932 30.5783C13.6805 30.6559 13.8812 30.6959 14.0839 30.6959C14.2866 30.6959 14.4874 30.6559 14.6746 30.5783C14.8619 30.5006 15.032 30.3868 15.1753 30.2434L29.7933 15.6253C30.0799 15.3389 30.3072 14.9989 30.4622 14.6246C30.6173 14.2503 30.697 13.8491 30.6968 13.4439V2.58163C30.6968 2.2427 30.5622 1.91766 30.3225 1.678C30.0829 1.43835 29.7578 1.30371 29.4189 1.30371ZM24.9462 8.97121C24.5671 8.97121 24.1965 8.85879 23.8812 8.64816C23.566 8.43753 23.3203 8.13816 23.1752 7.78789C23.0302 7.43763 22.9922 7.05221 23.0662 6.68037C23.1401 6.30853 23.3227 5.96698 23.5908 5.6989C23.8588 5.43082 24.2004 5.24826 24.5722 5.17429C24.9441 5.10033 25.3295 5.13829 25.6798 5.28337C26.03 5.42846 26.3294 5.67415 26.54 5.98938C26.7507 6.30461 26.8631 6.67521 26.8631 7.05434C26.8631 7.30606 26.8135 7.55533 26.7172 7.78789C26.6208 8.02046 26.4796 8.23177 26.3016 8.40977C26.1236 8.58777 25.9123 8.72897 25.6798 8.8253C25.4472 8.92163 25.1979 8.97121 24.9462 8.97121Z\" stroke=\"#222222\" stroke-width=\"1.33\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><\/path><\/g><defs><clipPath id=\"clip0_2583_9867\"><rect width=\"32\" height=\"32\" fill=\"white\"><\/rect><\/clipPath><\/defs><\/svg>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-terms\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-post-info__terms-list\">\n\t\t\t\t<a href=\"https:\/\/www.castfast.com\/en\/category\/knowledge\/\" class=\"elementor-post-info__terms-list-item\">Knowledge<\/a>\t\t\t\t<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-33916e9 e-flex e-con-boxed e-con e-parent\" data-id=\"33916e9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f31d56b elementor-widget elementor-widget-theme-post-excerpt\" data-id=\"f31d56b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"theme-post-excerpt.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\tWhich materials are available for iron casting from the 3D sand printer? EN-GJL or rather EN-GJS? What do you need to consider when choosing? The CASTFAST team reports from the field.   \t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1a37bef e-con-full e-flex e-con e-child\" data-id=\"1a37bef\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-622654dc elementor-widget elementor-widget-text-editor\" data-id=\"622654dc\" data-element_type=\"widget\" data-e-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\t\t<p>Designers who order 3D sand castings for the first time often ask about the available and usable materials. The short answer: everything that is possible with conventional sand casting can also be used with 3D sand printing: from aluminum to iron to steel. <\/p><p>The more nuanced answer: apart from the desired properties of the subsequent cast part, the component geometry plays an important role in the precise choice of material in order to ensure clean filling of the mold and a good solidification process. As 3D sand printing opens up new possibilities for the geometry of cast parts in particular, there are also implications for material selection. We will first briefly cover these for iron casting. We will deal with aluminum and steel elsewhere.   <\/p><h2>Iron casting with printed sand molds: Gray cast iron versus ductile iron<\/h2><p>Within the cast iron category alone, there is of course a whole host of materials that can be further refined and adjusted. At CASTFAST, we currently offer the material groups GJL (cast iron with lamellar graphite) and GJS (cast iron with spheroidal graphite) as standard. <\/p><p>GJL is the classic \u201cgray cast iron\u201d material. It is ideal for parts where machinability is more important than extreme strength. GJS on the other hand, nodular cast iron, is the all-rounder &#8211; stronger and tougher, a good choice for more demanding applications. It can often replace steel, which makes a huge difference in casting. Casting iron is easier than casting steel. The carbon in the molten metal \u201cgrows\u201d, i.e. increases in volume, as it solidifies, creating pressure and making the structure denser. This does not happen with steel. The result is shrinkage during casting, which has to be laboriously controlled.       <\/p><h2>Small strength theory<\/h2><p>An important point is the specific compressive and tensile strength of cast iron. GJL materials have excellent compressive strength, making them ideal for applications where high load-bearing capacity under pressure is required. GJS materials, on the other hand, are characterized by their superior tensile strength, which makes them indispensable for applications where the material must withstand tensile forces.  <\/p><p>These differences in strength properties enable us to offer the right solution for almost any requirement. For example, a GJL may only have a tensile strength of 200 MPa, but a compressive strength of up to 800 MPa. This can be exploited in the design! In addition, GJL is characterized by very good thermal conductivity and a high damping capacity. The vibration-damping properties in particular make GJL a popular material for machine components.    <\/p><h2>Into the filigree detail: Materials and 3D sand printing<\/h2><p>Due to the precision of the process and the freedom of design, molds created in the 3D sand printer make more complex, thinner-walled, more delicate castings possible. When this is taken to the extreme, it has important implications for material selection. <\/p><p>In principle, GJL materials flow better. They are more \u201cfluid\u201d at the micro level. GJL can therefore also fill complex shapes with very thin walls well. The problem is that a thin wall means rapid cooling, which can quickly make a GJL material very brittle. GJS materials also have this brittleness problem. But they are inherently tougher. In terms of their structural properties, they react more tolerantly to rapid cooling, but are also tougher in the liquid state and do not flow as well.      <\/p><p>In practice, we therefore always weigh up the options individually to find the right material. As a designer, however, you should start with the desired component properties. We take care of the technical casting considerations in borderline cases. So far, we have always found a solution!   <\/p><p>Interested in trying it out? Click here to go to our <a href=\"https:\/\/www.castfast.com\/en\/?page_id=5171\"><strong>calculator<\/strong><\/a>. You can find out more about the materials in detail in the table below. Still have questions? We are <strong><a href=\"https:\/\/www.castfast.com\/#contact\">gladly<\/a><\/strong>.    <\/p><p> <\/p><h2><span class=\"TextRun MacChromeBold SCXW189604702 BCX9\" lang=\"DE-DE\" xml:lang=\"DE-DE\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW189604702 BCX9\" data-ccp-parastyle=\"heading 2\">The<\/span><span class=\"NormalTextRun SCXW189604702 BCX9\" data-ccp-parastyle=\"heading 2\"> specific materials<\/span><span class=\"NormalTextRun SCXW189604702 BCX9\" data-ccp-parastyle=\"heading 2\"> at a<\/span><span class=\"NormalTextRun SCXW189604702 BCX9\" data-ccp-parastyle=\"heading 2\"> overview<\/span><\/span><\/h2><p> <\/p><h3>GJL 200<\/h3><p><strong>Areas of application<\/strong><br>Components subject to light (tensile) loads such as small housings, machine beds for light machines, covers, frames for electrical machines.<\/p><p><strong>Properties<\/strong><br>Good machinability, low strength.<\/p><hr><h3>GJL 250<\/h3><p><strong>Areas of application<br><\/strong>Medium-heavy (tensile) loaded parts such as larger machine beds, housings for larger gearboxes, motor housings, pump bodies, valve bodies, base plates.<\/p><p><strong>Properties<\/strong><br>Better strength than GJL 200, good machinability.<\/p><hr><h3>GJL 300<\/h3><p><strong>Areas of application<br><\/strong>Highly stressed machine parts that require greater strength, such as large gearbox housings, press frames, heavy machine beds, large pump bodies.<\/p><p><strong>Properties<\/strong><br>Higher strength than GJL 250, still good machinability.<\/p><hr><h3>GJS 400<\/h3><p><strong>Areas of application<br><\/strong>Components in the automotive industry (axle beams, brake drums, steering parts), machine components subject to medium loads.<\/p><p><strong>Properties<\/strong><br>Good strength and toughness, better wear resistance than GJL.<\/p><hr><h3>GJS 500<\/h3><p><strong>Areas of application<br><\/strong>Highly stressed automotive components (truck axles, transmission parts), heavy mechanical engineering components, agricultural machinery, construction machinery components.<\/p><p><strong>Properties<\/strong><br>Even higher strength than GJS 400, but less tough. So it breaks earlier. <\/p><hr><h3>GJS 600<\/h3><p><strong>Areas of application<br><\/strong>Very highly stressed parts such as heavy vehicle parts, large industrial gearboxes, components for heavy machinery and construction machinery.<\/p><p><strong>Properties<\/strong><br>High strength and very good toughness.<\/p><hr><h3>GJS 700<\/h3><p><strong>Areas of application<\/strong><\/p><p>Extremely stressed components in demanding applications such as parts for mining machinery, heavy construction machinery components, highly stressed parts in power generation.<\/p><p><strong>Properties<\/strong><br>Highest strength, but lowest toughness. The milling cutters literally bite their teeth out on this. Really hard, so little wear.  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a231219 elementor-widget elementor-widget-post-navigation\" data-id=\"a231219\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"post-navigation.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-post-navigation\" role=\"navigation\" aria-label=\"Post Navigation\">\n\t\t\t<div class=\"elementor-post-navigation__prev elementor-post-navigation__link\">\n\t\t\t\t<a href=\"https:\/\/www.castfast.com\/en\/2024\/03\/25\/super-fast-molds-on-demand-castfast-for-foundries\/\" rel=\"prev\"><span class=\"post-navigation__arrow-wrapper post-navigation__arrow-prev\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-angle-double-left\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M223.7 239l136-136c9.4-9.4 24.6-9.4 33.9 0l22.6 22.6c9.4 9.4 9.4 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EN-GJL or rather EN-GJS? What do you need to consider when choosing? The CASTFAST team reports from the field.   <\/p>\n","protected":false},"author":8,"featured_media":4922,"comment_status":"closed","ping_status":"open","sticky":false,"template":"elementor_header_footer","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[49],"tags":[53,55,54,59,61],"class_list":["post-5207","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knowledge","tag-3d-sand-printing","tag-cast-iron","tag-castfast-en","tag-casting","tag-spheroidal-graphite-cast-iron"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>3D sand printing: which material for what? | CASTFAST<\/title>\n<meta name=\"description\" content=\"Which materials are available for iron casting with 3D sand printing? EN-GJL or rather EN-GJS? 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