{"id":2390,"date":"2025-04-29T13:35:30","date_gmt":"2025-04-29T05:35:30","guid":{"rendered":"https:\/\/www.ductileironsuppliers.com\/?p=2390"},"modified":"2025-05-30T16:19:51","modified_gmt":"2025-05-30T08:19:51","slug":"what-is-stronger-cast-iron-or-ductile-iron","status":"publish","type":"post","link":"https:\/\/www.ductileironsuppliers.com\/ar\/what-is-stronger-cast-iron-or-ductile-iron.html","title":{"rendered":"\u0645\u0627 \u0647\u0648 \u0627\u0644\u0623\u0642\u0648\u0649\u060c \u062d\u062f\u064a\u062f \u0627\u0644\u0632\u0647\u0631 \u0623\u0645 \u062d\u062f\u064a\u062f \u0627\u0644\u062f\u0643\u062a\u0627\u064a\u0644\u061f"},"content":{"rendered":"<p class=\"\" data-start=\"107\" data-end=\"475\">When comparing two popular types of iron used in industrial applications\u2014<strong data-start=\"180\" data-end=\"193\">cast iron<\/strong> and <strong data-start=\"198\" data-end=\"214\">ductile iron<\/strong>\u2014one of the most important factors to consider is their <strong data-start=\"270\" data-end=\"282\">strength<\/strong>. Both materials are used for producing components that require high durability, but they possess distinct physical and mechanical properties that make them suitable for different applications.<\/p>\n<p class=\"\" data-start=\"477\" data-end=\"802\">In this article, we\u2019ll examine the <strong data-start=\"512\" data-end=\"562\">differences between cast iron and ductile iron<\/strong>, specifically focusing on their relative <strong data-start=\"604\" data-end=\"616\">strength<\/strong>. Through a detailed analysis, we will explore their chemical composition, mechanical properties, manufacturing processes, and the types of applications each material is best suited for.<\/p>\n<figure id=\"attachment_2391\" aria-describedby=\"caption-attachment-2391\" style=\"width: 541px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.ductileironsuppliers.com\/wp-content\/uploads\/2025\/04\/t7c1e-bh3a7.webp\"><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-2391\" src=\"https:\/\/www.ductileironsuppliers.com\/wp-content\/uploads\/2025\/04\/t7c1e-bh3a7.webp\" alt=\"What is Stronger, Cast Iron or Ductile Iron?\" width=\"541\" height=\"545\" srcset=\"https:\/\/www.ductileironsuppliers.com\/wp-content\/uploads\/2025\/04\/t7c1e-bh3a7.webp 541w, https:\/\/www.ductileironsuppliers.com\/wp-content\/uploads\/2025\/04\/t7c1e-bh3a7-298x300.webp 298w, https:\/\/www.ductileironsuppliers.com\/wp-content\/uploads\/2025\/04\/t7c1e-bh3a7-150x150.webp 150w\" sizes=\"(max-width: 541px) 100vw, 541px\" \/><\/a><figcaption id=\"caption-attachment-2391\" class=\"wp-caption-text\">What is Stronger, Cast Iron or Ductile Iron?<\/figcaption><\/figure>\n<h3 class=\"\" data-start=\"1457\" data-end=\"1482\">1. What is Cast Iron?<\/h3>\n<p class=\"\" data-start=\"1484\" data-end=\"1758\"><strong data-start=\"1484\" data-end=\"1497\">Cast iron<\/strong> is a group of iron-carbon alloys with a carbon content greater than 2%. It is known for its excellent castability, high wear resistance, and good vibration damping qualities. Cast iron is made by melting iron and pouring it into molds to create complex shapes.<\/p>\n<h4 class=\"\" data-start=\"1760\" data-end=\"1784\">Types of Cast Iron:<\/h4>\n<ul data-start=\"1785\" data-end=\"2346\">\n<li class=\"\" data-start=\"1785\" data-end=\"1987\">\n<p class=\"\" data-start=\"1787\" data-end=\"1987\"><strong data-start=\"1787\" data-end=\"1805\">Grey Cast Iron<\/strong>: The most common form of cast iron, characterized by its grey appearance due to the presence of graphite flakes. It has good castability and machinability but is relatively brittle.<\/p>\n<\/li>\n<li class=\"\" data-start=\"1988\" data-end=\"2102\">\n<p class=\"\" data-start=\"1990\" data-end=\"2102\"><strong data-start=\"1990\" data-end=\"2009\">White Cast Iron<\/strong>: Has a hard, brittle structure and is mainly used in applications requiring wear resistance.<\/p>\n<\/li>\n<li class=\"\" data-start=\"2103\" data-end=\"2229\">\n<p class=\"\" data-start=\"2105\" data-end=\"2229\"><strong data-start=\"2105\" data-end=\"2128\">Malleable Cast Iron<\/strong>: Formed by heat treating white cast iron, it has increased ductility and is used for complex shapes.<\/p>\n<\/li>\n<li class=\"\" data-start=\"2230\" data-end=\"2346\">\n<p class=\"\" data-start=\"2232\" data-end=\"2346\"><strong data-start=\"2232\" data-end=\"2259\">Compacted Graphite Iron<\/strong>: A blend between cast iron and ductile iron, offering both strength and machinability.<\/p>\n<\/li>\n<\/ul>\n<h4 class=\"\" data-start=\"2348\" data-end=\"2381\">Key Properties of Cast Iron:<\/h4>\n<ul data-start=\"2382\" data-end=\"2756\">\n<li class=\"\" data-start=\"2382\" data-end=\"2502\">\n<p class=\"\" data-start=\"2384\" data-end=\"2502\"><strong data-start=\"2384\" data-end=\"2402\">Brittle Nature<\/strong>: Cast iron tends to break or fracture under high tensile stress due to its brittle graphite flakes.<\/p>\n<\/li>\n<li class=\"\" data-start=\"2503\" data-end=\"2639\">\n<p class=\"\" data-start=\"2505\" data-end=\"2639\"><strong data-start=\"2505\" data-end=\"2530\">Excellent Castability<\/strong>: Its ability to form complex shapes and structures easily is one of the main reasons for its widespread use.<\/p>\n<\/li>\n<li class=\"\" data-start=\"2640\" data-end=\"2756\">\n<p class=\"\" data-start=\"2642\" data-end=\"2756\"><strong data-start=\"2642\" data-end=\"2666\">High Wear Resistance<\/strong>: Especially in grey cast iron, which is used in engines and other high-wear applications.<\/p>\n<\/li>\n<\/ul>\n<h3 class=\"\" data-start=\"2763\" data-end=\"2791\">2. What is Ductile Iron?<\/h3>\n<p class=\"\" data-start=\"2793\" data-end=\"3152\"><strong data-start=\"2793\" data-end=\"2809\">Ductile iron<\/strong>, also known as <strong data-start=\"2825\" data-end=\"2846\">nodular cast iron<\/strong> or <strong data-start=\"2850\" data-end=\"2878\">spheroidal graphite iron<\/strong>, is a type of cast iron that has been modified with the addition of magnesium to form graphite nodules (spheres). This unique structure significantly enhances the material\u2019s strength, toughness, and ductility, making it suitable for a wide range of industrial applications.<\/p>\n<h4 class=\"\" data-start=\"3154\" data-end=\"3190\">Key Properties of Ductile Iron:<\/h4>\n<ul data-start=\"3191\" data-end=\"3642\">\n<li class=\"\" data-start=\"3191\" data-end=\"3318\">\n<p class=\"\" data-start=\"3193\" data-end=\"3318\"><strong data-start=\"3193\" data-end=\"3206\">Ductility<\/strong>: Ductile iron can be stretched or deformed without breaking, making it less brittle than traditional cast iron.<\/p>\n<\/li>\n<li class=\"\" data-start=\"3319\" data-end=\"3485\">\n<p class=\"\" data-start=\"3321\" data-end=\"3485\"><strong data-start=\"3321\" data-end=\"3347\">Strength and Toughness<\/strong>: It offers significantly better strength and impact resistance compared to regular cast iron, thanks to the spherical graphite structure.<\/p>\n<\/li>\n<li class=\"\" data-start=\"3486\" data-end=\"3642\">\n<p class=\"\" data-start=\"3488\" data-end=\"3642\"><strong data-start=\"3488\" data-end=\"3515\">High Fatigue Resistance<\/strong>: Due to its improved mechanical properties, ductile iron can withstand cyclical stresses better than other forms of cast iron.<\/p>\n<\/li>\n<\/ul>\n<h4 class=\"\" data-start=\"3644\" data-end=\"3677\">Common Uses of Ductile Iron:<\/h4>\n<ul data-start=\"3678\" data-end=\"3923\">\n<li class=\"\" data-start=\"3678\" data-end=\"3756\">\n<p class=\"\" data-start=\"3680\" data-end=\"3756\"><strong data-start=\"3680\" data-end=\"3705\">Automotive Components<\/strong>: Crankshafts, suspension parts, and engine blocks.<\/p>\n<\/li>\n<li class=\"\" data-start=\"3757\" data-end=\"3832\">\n<p class=\"\" data-start=\"3759\" data-end=\"3832\"><strong data-start=\"3759\" data-end=\"3777\">Infrastructure<\/strong>: Water and sewage pipes, manhole covers, and fittings.<\/p>\n<\/li>\n<li class=\"\" data-start=\"3833\" data-end=\"3923\">\n<p class=\"\" data-start=\"3835\" data-end=\"3923\"><strong data-start=\"3835\" data-end=\"3854\">Heavy Machinery<\/strong>: Gears, brackets, and housings in construction and mining equipment.<\/p>\n<\/li>\n<\/ul>\n<h3 class=\"\" data-start=\"3930\" data-end=\"3984\">3. Strength Comparison: Cast Iron vs. Ductile Iron<\/h3>\n<p class=\"\" data-start=\"3986\" data-end=\"4159\">When it comes to <strong data-start=\"4003\" data-end=\"4015\">strength<\/strong>, ductile iron outperforms traditional cast iron in several important areas, including tensile strength, yield strength, and overall durability.<\/p>\n<h4 class=\"\" data-start=\"4161\" data-end=\"4183\">Tensile Strength:<\/h4>\n<ul data-start=\"4184\" data-end=\"4433\">\n<li class=\"\" data-start=\"4184\" data-end=\"4285\">\n<p class=\"\" data-start=\"4186\" data-end=\"4285\"><strong data-start=\"4186\" data-end=\"4199\">Cast Iron<\/strong>: Grey cast iron typically has a tensile strength ranging from <strong data-start=\"4262\" data-end=\"4284\">150 MPa to 400 MPa<\/strong>.<\/p>\n<\/li>\n<li class=\"\" data-start=\"4286\" data-end=\"4433\">\n<p class=\"\" data-start=\"4288\" data-end=\"4433\"><strong data-start=\"4288\" data-end=\"4304\">Ductile Iron<\/strong>: Ductile iron generally has a tensile strength between <strong data-start=\"4360\" data-end=\"4383\">400 MPa and 900 MPa<\/strong>, making it significantly stronger than cast iron.<\/p>\n<\/li>\n<\/ul>\n<h4 class=\"\" data-start=\"4435\" data-end=\"4455\">Yield Strength:<\/h4>\n<ul data-start=\"4456\" data-end=\"4766\">\n<li class=\"\" data-start=\"4456\" data-end=\"4617\">\n<p class=\"\" data-start=\"4458\" data-end=\"4617\"><strong data-start=\"4458\" data-end=\"4471\">Cast Iron<\/strong>: The yield strength of grey cast iron is approximately <strong data-start=\"4527\" data-end=\"4549\">200 MPa to 300 MPa<\/strong>, which means it can deform plastically under stress before failing.<\/p>\n<\/li>\n<li class=\"\" data-start=\"4618\" data-end=\"4766\">\n<p class=\"\" data-start=\"4620\" data-end=\"4766\"><strong data-start=\"4620\" data-end=\"4636\">Ductile Iron<\/strong>: Ductile iron exhibits a yield strength of around <strong data-start=\"4687\" data-end=\"4709\">300 MPa to 700 MPa<\/strong>, providing greater resistance to deformation under load.<\/p>\n<\/li>\n<\/ul>\n<h4 class=\"\" data-start=\"4768\" data-end=\"4782\">Hardness:<\/h4>\n<ul data-start=\"4783\" data-end=\"5105\">\n<li class=\"\" data-start=\"4783\" data-end=\"4948\">\n<p class=\"\" data-start=\"4785\" data-end=\"4948\"><strong data-start=\"4785\" data-end=\"4798\">Cast Iron<\/strong>: Cast iron hardness can vary depending on the type, but grey cast iron typically has a hardness rating between <strong data-start=\"4910\" data-end=\"4928\">170 and 230 HB<\/strong> (Brinell Hardness).<\/p>\n<\/li>\n<li class=\"\" data-start=\"4949\" data-end=\"5105\">\n<p class=\"\" data-start=\"4951\" data-end=\"5105\"><strong data-start=\"4951\" data-end=\"4967\">Ductile Iron<\/strong>: Ductile iron tends to have a hardness rating of <strong data-start=\"5017\" data-end=\"5034\">180 to 280 HB<\/strong>, which is comparable or slightly higher than cast iron in some grades.<\/p>\n<\/li>\n<\/ul>\n<h4 class=\"\" data-start=\"5107\" data-end=\"5128\">Impact Strength:<\/h4>\n<ul data-start=\"5129\" data-end=\"5427\">\n<li class=\"\" data-start=\"5129\" data-end=\"5265\">\n<p class=\"\" data-start=\"5131\" data-end=\"5265\"><strong data-start=\"5131\" data-end=\"5144\">Cast Iron<\/strong>: Due to its brittle nature, cast iron is generally <strong data-start=\"5196\" data-end=\"5223\">poor in impact strength<\/strong> and prone to cracking under sudden force.<\/p>\n<\/li>\n<li class=\"\" data-start=\"5266\" data-end=\"5427\">\n<p class=\"\" data-start=\"5268\" data-end=\"5427\"><strong data-start=\"5268\" data-end=\"5284\">Ductile Iron<\/strong>: Thanks to its ductile nature, ductile iron exhibits significantly better impact resistance, making it <strong data-start=\"5388\" data-end=\"5426\">more resilient under shock loading<\/strong>.<\/p>\n<\/li>\n<\/ul>\n<h4 class=\"\" data-start=\"5429\" data-end=\"5453\">Fatigue Resistance:<\/h4>\n<ul data-start=\"5454\" data-end=\"5684\">\n<li class=\"\" data-start=\"5454\" data-end=\"5560\">\n<p class=\"\" data-start=\"5456\" data-end=\"5560\"><strong data-start=\"5456\" data-end=\"5469\">Cast Iron<\/strong>: Cast iron is <strong data-start=\"5484\" data-end=\"5515\">not as resistant to fatigue<\/strong> (cyclical loading) compared to ductile iron.<\/p>\n<\/li>\n<li class=\"\" data-start=\"5561\" data-end=\"5684\">\n<p class=\"\" data-start=\"5563\" data-end=\"5684\"><strong data-start=\"5563\" data-end=\"5579\">Ductile Iron<\/strong>: Ductile iron has excellent fatigue resistance, allowing it to handle repetitive stress without failure.<\/p>\n<\/li>\n<\/ul>\n<h4 class=\"\" data-start=\"5686\" data-end=\"5722\">Summary of Strength Comparison:<\/h4>\n<div class=\"group pointer-events-none relative flex justify-center *:pointer-events-auto\">\n<p>&nbsp;<\/p>\n<div class=\"tableContainer horzScrollShadows relative\">\n<table class=\"min-w-full\" data-start=\"5724\" data-end=\"6259\">\n<thead data-start=\"5724\" data-end=\"5798\">\n<tr data-start=\"5724\" data-end=\"5798\">\n<th data-start=\"5724\" data-end=\"5745\">Property<\/th>\n<th data-start=\"5745\" data-end=\"5771\"><strong data-start=\"5747\" data-end=\"5760\">Cast Iron<\/strong><\/th>\n<th data-start=\"5771\" data-end=\"5798\"><strong data-start=\"5773\" data-end=\"5789\">Ductile Iron<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"5874\" data-end=\"6259\">\n<tr data-start=\"5874\" data-end=\"5950\">\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"5874\" data-end=\"5897\"><strong data-start=\"5876\" data-end=\"5896\">Tensile Strength<\/strong><\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"5897\" data-end=\"5923\">150\u2013400 MPa<\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"5923\" data-end=\"5950\">400\u2013900 MPa<\/td>\n<\/tr>\n<tr data-start=\"5951\" data-end=\"6027\">\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"5951\" data-end=\"5974\"><strong data-start=\"5953\" data-end=\"5971\">Yield Strength<\/strong><\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"5974\" data-end=\"6000\">200\u2013300 MPa<\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6000\" data-end=\"6027\">300\u2013700 MPa<\/td>\n<\/tr>\n<tr data-start=\"6028\" data-end=\"6104\">\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6028\" data-end=\"6051\"><strong data-start=\"6030\" data-end=\"6042\">Hardness<\/strong><\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6051\" data-end=\"6077\">170\u2013230 HB<\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6077\" data-end=\"6104\">180\u2013280 HB<\/td>\n<\/tr>\n<tr data-start=\"6105\" data-end=\"6181\">\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6105\" data-end=\"6128\"><strong data-start=\"6107\" data-end=\"6126\">Impact Strength<\/strong><\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6128\" data-end=\"6154\">Low (Brittle)<\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6154\" data-end=\"6181\">High (Tough and Ductile)<\/td>\n<\/tr>\n<tr data-start=\"6182\" data-end=\"6259\">\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6182\" data-end=\"6206\"><strong data-start=\"6184\" data-end=\"6206\">Fatigue Resistance<\/strong><\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6206\" data-end=\"6232\">Poor<\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6232\" data-end=\"6259\">Excellent<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p class=\"\" data-start=\"6261\" data-end=\"6411\">From the comparison, it is clear that <strong data-start=\"6299\" data-end=\"6315\">ductile iron<\/strong> is stronger, tougher, and more resilient than traditional <strong data-start=\"6374\" data-end=\"6387\">cast iron<\/strong> in almost every aspect.<\/p>\n<h3 class=\"\" data-start=\"6418\" data-end=\"6475\">4. Chemical Composition of Cast Iron and Ductile Iron<\/h3>\n<p class=\"\" data-start=\"6477\" data-end=\"6581\">The <strong data-start=\"6481\" data-end=\"6505\">chemical composition<\/strong> of these two materials plays a crucial role in their mechanical properties.<\/p>\n<div class=\"group pointer-events-none relative flex justify-center *:pointer-events-auto\">\n<p>&nbsp;<\/p>\n<div class=\"tableContainer horzScrollShadows relative\">\n<table class=\"min-w-full\" data-start=\"6583\" data-end=\"7190\">\n<thead data-start=\"6583\" data-end=\"6658\">\n<tr data-start=\"6583\" data-end=\"6658\">\n<th data-start=\"6583\" data-end=\"6605\"><strong data-start=\"6585\" data-end=\"6596\">Element<\/strong><\/th>\n<th data-start=\"6605\" data-end=\"6631\"><strong data-start=\"6607\" data-end=\"6620\">Cast Iron<\/strong><\/th>\n<th data-start=\"6631\" data-end=\"6658\"><strong data-start=\"6633\" data-end=\"6649\">Ductile Iron<\/strong><\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"6735\" data-end=\"7190\">\n<tr data-start=\"6735\" data-end=\"6810\">\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6735\" data-end=\"6757\"><strong data-start=\"6737\" data-end=\"6751\">Carbon (C)<\/strong><\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6757\" data-end=\"6783\">2.5\u20134.0%<\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6783\" data-end=\"6810\">3.0\u20134.0%<\/td>\n<\/tr>\n<tr data-start=\"6811\" data-end=\"6886\">\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6811\" data-end=\"6833\"><strong data-start=\"6813\" data-end=\"6829\">Silicon (Si)<\/strong><\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6833\" data-end=\"6859\">1.0\u20133.0%<\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6859\" data-end=\"6886\">2.0\u20133.0%<\/td>\n<\/tr>\n<tr data-start=\"6887\" data-end=\"6962\">\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6887\" data-end=\"6909\"><strong data-start=\"6889\" data-end=\"6907\">Manganese (Mn)<\/strong><\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6909\" data-end=\"6935\">0.5\u20131.0%<\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6935\" data-end=\"6962\">0.5\u20131.0%<\/td>\n<\/tr>\n<tr data-start=\"6963\" data-end=\"7038\">\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6963\" data-end=\"6985\"><strong data-start=\"6965\" data-end=\"6979\">Sulfur (S)<\/strong><\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"6985\" data-end=\"7011\">0.05\u20130.1%<\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"7011\" data-end=\"7038\">0.05\u20130.1%<\/td>\n<\/tr>\n<tr data-start=\"7039\" data-end=\"7114\">\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"7039\" data-end=\"7061\"><strong data-start=\"7041\" data-end=\"7059\">Phosphorus (P)<\/strong><\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"7061\" data-end=\"7087\">0.05\u20130.1%<\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"7087\" data-end=\"7114\">0.05\u20130.1%<\/td>\n<\/tr>\n<tr data-start=\"7115\" data-end=\"7190\">\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"7115\" data-end=\"7137\"><strong data-start=\"7117\" data-end=\"7135\">Magnesium (Mg)<\/strong><\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"7137\" data-end=\"7163\">Not present<\/td>\n<td class=\"max-w-[calc(var(--thread-content-max-width)*2\/3)]\" data-start=\"7163\" data-end=\"7190\">0.03\u20130.06%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p class=\"\" data-start=\"7192\" data-end=\"7227\"><strong data-start=\"7192\" data-end=\"7226\">Key Differences in Composition<\/strong>:<\/p>\n<ul data-start=\"7228\" data-end=\"7545\">\n<li class=\"\" data-start=\"7228\" data-end=\"7412\">\n<p class=\"\" data-start=\"7230\" data-end=\"7412\"><strong data-start=\"7230\" data-end=\"7246\">Ductile Iron<\/strong> has magnesium added to it, which is responsible for the formation of spherical graphite nodules. This is what gives ductile iron its superior strength and toughness.<\/p>\n<\/li>\n<li class=\"\" data-start=\"7413\" data-end=\"7545\">\n<p class=\"\" data-start=\"7415\" data-end=\"7545\"><strong data-start=\"7415\" data-end=\"7428\">Cast Iron<\/strong> does not have magnesium and typically contains graphite in the form of flakes, which contributes to its brittleness.<\/p>\n<\/li>\n<\/ul>\n<h3 class=\"\" data-start=\"7552\" data-end=\"7628\">5. Mechanical Properties: Tensile Strength, Yield Strength, and Hardness<\/h3>\n<p class=\"\" data-start=\"7630\" data-end=\"7807\">The <strong data-start=\"7634\" data-end=\"7659\">mechanical properties<\/strong> of cast iron and ductile iron depend on their microstructure, which is directly influenced by their chemical composition and manufacturing process.<\/p>\n<h4 class=\"\" data-start=\"7809\" data-end=\"7835\"><strong data-start=\"7814\" data-end=\"7834\">Tensile Strength<\/strong>:<\/h4>\n<ul data-start=\"7836\" data-end=\"8094\">\n<li class=\"\" data-start=\"7836\" data-end=\"7958\">\n<p class=\"\" data-start=\"7838\" data-end=\"7958\"><strong data-start=\"7838\" data-end=\"7851\">Cast Iron<\/strong>: Typically has lower tensile strength due to its flake graphite structure, making it weaker under tension.<\/p>\n<\/li>\n<li class=\"\" data-start=\"7959\" data-end=\"8094\">\n<p class=\"\" data-start=\"7961\" data-end=\"8094\"><strong data-start=\"7961\" data-end=\"7977\">Ductile Iron<\/strong>: Has higher tensile strength because of its spherical graphite structure, which helps distribute stress more evenly.<\/p>\n<\/li>\n<\/ul>\n<h4 class=\"\" data-start=\"8096\" data-end=\"8120\"><strong data-start=\"8101\" data-end=\"8119\">Yield Strength<\/strong>:<\/h4>\n<ul data-start=\"8121\" data-end=\"8369\">\n<li class=\"\" data-start=\"8121\" data-end=\"8240\">\n<p class=\"\" data-start=\"8123\" data-end=\"8240\"><strong data-start=\"8123\" data-end=\"8136\">Cast Iron<\/strong>: The yield strength of cast iron is lower, which means it deforms more easily when subjected to stress.<\/p>\n<\/li>\n<li class=\"\" data-start=\"8241\" data-end=\"8369\">\n<p class=\"\" data-start=\"8243\" data-end=\"8369\"><strong data-start=\"8243\" data-end=\"8259\">Ductile Iron<\/strong>: Exhibits higher yield strength, meaning it can handle greater stress before it begins to deform plastically.<\/p>\n<\/li>\n<\/ul>\n<h4 class=\"\" data-start=\"8371\" data-end=\"8389\"><strong data-start=\"8376\" data-end=\"8388\">Hardness<\/strong>:<\/h4>\n<ul data-start=\"8390\" data-end=\"8617\">\n<li class=\"\" data-start=\"8390\" data-end=\"8489\">\n<p class=\"\" data-start=\"8392\" data-end=\"8489\"><strong data-start=\"8392\" data-end=\"8405\">Cast Iron<\/strong>: Has moderate hardness, but its brittleness limits its ability to withstand impact.<\/p>\n<\/li>\n<li class=\"\" data-start=\"8490\" data-end=\"8617\">\n<p class=\"\" data-start=\"8492\" data-end=\"8617\"><strong data-start=\"8492\" data-end=\"8508\">Ductile Iron<\/strong>: Has better hardness and impact resistance, making it more suitable for applications that require toughness.<\/p>\n<\/li>\n<\/ul>\n<h3 class=\"\" data-start=\"8624\" data-end=\"8654\">6. Manufacturing Processes<\/h3>\n<p class=\"\" data-start=\"8656\" data-end=\"8818\">Both <strong data-start=\"8661\" data-end=\"8674\">cast iron<\/strong> and <strong data-start=\"8679\" data-end=\"8695\">ductile iron<\/strong> are produced using casting processes, but their methods and material treatments differ to achieve their unique properties.<\/p>\n<h4 class=\"\" data-start=\"8820\" data-end=\"8861\"><strong data-start=\"8825\" data-end=\"8860\">Cast Iron Manufacturing Process<\/strong>:<\/h4>\n<ol data-start=\"8862\" data-end=\"9128\">\n<li class=\"\" data-start=\"8862\" data-end=\"8906\">\n<p class=\"\" data-start=\"8865\" data-end=\"8906\"><strong data-start=\"8865\" data-end=\"8876\">Melting<\/strong>: Iron is melted in a furnace.<\/p>\n<\/li>\n<li class=\"\" data-start=\"8907\" data-end=\"8975\">\n<p class=\"\" data-start=\"8910\" data-end=\"8975\"><strong data-start=\"8910\" data-end=\"8921\">Pouring<\/strong>: The molten iron is poured into molds to form shapes.<\/p>\n<\/li>\n<li class=\"\" data-start=\"8976\" data-end=\"9042\">\n<p class=\"\" data-start=\"8979\" data-end=\"9042\"><strong data-start=\"8979\" data-end=\"8997\">Solidification<\/strong>: The material is allowed to cool and harden.<\/p>\n<\/li>\n<li class=\"\" data-start=\"9043\" data-end=\"9128\">\n<p class=\"\" data-start=\"9046\" data-end=\"9128\"><strong data-start=\"9046\" data-end=\"9059\">Machining<\/strong>: Post-casting machining is required to refine dimensions and finish.<\/p>\n<\/li>\n<\/ol>\n<h4 class=\"\" data-start=\"9130\" data-end=\"9174\"><strong data-start=\"9135\" data-end=\"9173\">Ductile Iron Manufacturing Process<\/strong>:<\/h4>\n<ol data-start=\"9175\" data-end=\"9505\">\n<li class=\"\" data-start=\"9175\" data-end=\"9229\">\n<p class=\"\" data-start=\"9178\" data-end=\"9229\"><strong data-start=\"9178\" data-end=\"9189\">Melting<\/strong>: Iron is melted similarly to cast iron.<\/p>\n<\/li>\n<li class=\"\" data-start=\"9230\" data-end=\"9340\">\n<p class=\"\" data-start=\"9233\" data-end=\"9340\"><strong data-start=\"9233\" data-end=\"9253\">Adding Magnesium<\/strong>: Magnesium is added to the molten iron to promote the formation of spherical graphite.<\/p>\n<\/li>\n<li class=\"\" data-start=\"9341\" data-end=\"9394\">\n<p class=\"\" data-start=\"9344\" data-end=\"9394\"><strong data-start=\"9344\" data-end=\"9355\">Pouring<\/strong>: The molten iron is poured into molds.<\/p>\n<\/li>\n<li class=\"\" data-start=\"9395\" data-end=\"9505\">\n<p class=\"\" data-start=\"9398\" data-end=\"9505\"><strong data-start=\"9398\" data-end=\"9430\">Solidification and Machining<\/strong>: The material is allowed to solidify, then machined to desired dimensions.<\/p>\n<\/li>\n<\/ol>\n<h3 class=\"\" data-start=\"9512\" data-end=\"9561\">7. Applications of Cast Iron and Ductile Iron<\/h3>\n<h4 class=\"\" data-start=\"9563\" data-end=\"9595\"><strong data-start=\"9568\" data-end=\"9594\">Cast Iron Applications<\/strong>:<\/h4>\n<ul data-start=\"9596\" data-end=\"9704\">\n<li class=\"\" data-start=\"9596\" data-end=\"9611\">\n<p class=\"\" data-start=\"9598\" data-end=\"9611\">Engine blocks<\/p>\n<\/li>\n<li class=\"\" data-start=\"9612\" data-end=\"9627\">\n<p class=\"\" data-start=\"9614\" data-end=\"9627\">Machine tools<\/p>\n<\/li>\n<li class=\"\" data-start=\"9628\" data-end=\"9656\">\n<p class=\"\" data-start=\"9630\" data-end=\"9656\">Pipes for water and sewage<\/p>\n<\/li>\n<li class=\"\" data-start=\"9657\" data-end=\"9673\">\n<p class=\"\" data-start=\"9659\" data-end=\"9673\">Manhole covers<\/p>\n<\/li>\n<li class=\"\" data-start=\"9674\" data-end=\"9704\">\n<p class=\"\" data-start=\"9676\" data-end=\"9704\">Brake components in vehicles<\/p>\n<\/li>\n<\/ul>\n<h4 class=\"\" data-start=\"9706\" data-end=\"9741\"><strong data-start=\"9711\" data-end=\"9740\">Ductile Iron Applications<\/strong>:<\/h4>\n<ul data-start=\"9742\" data-end=\"9856\">\n<li class=\"\" data-start=\"9742\" data-end=\"9776\">\n<p class=\"\" data-start=\"9744\" data-end=\"9776\">Automotive suspension components<\/p>\n<\/li>\n<li class=\"\" data-start=\"9777\" data-end=\"9790\">\n<p class=\"\" data-start=\"9779\" data-end=\"9790\">Crankshafts<\/p>\n<\/li>\n<li class=\"\" data-start=\"9791\" data-end=\"9802\">\n<p class=\"\" data-start=\"9793\" data-end=\"9802\">Gearboxes<\/p>\n<\/li>\n<li class=\"\" data-start=\"9803\" data-end=\"9834\">\n<p class=\"\" data-start=\"9805\" data-end=\"9834\">Industrial equipment housings<\/p>\n<\/li>\n<li class=\"\" data-start=\"9835\" data-end=\"9856\">\n<p class=\"\" data-start=\"9837\" data-end=\"9856\">Water and gas pipes<\/p>\n<\/li>\n<\/ul>\n<h3 class=\"\" data-start=\"9863\" data-end=\"9898\">8. Advantages and Disadvantages<\/h3>\n<h4 class=\"\" data-start=\"9900\" data-end=\"9933\"><strong data-start=\"9905\" data-end=\"9932\">Advantages of Cast Iron<\/strong>:<\/h4>\n<ul data-start=\"9934\" data-end=\"10033\">\n<li class=\"\" data-start=\"9934\" data-end=\"9946\">\n<p class=\"\" data-start=\"9936\" data-end=\"9946\">Lower cost<\/p>\n<\/li>\n<li class=\"\" data-start=\"9947\" data-end=\"9974\">\n<p class=\"\" data-start=\"9949\" data-end=\"9974\">Excellent casting ability<\/p>\n<\/li>\n<li class=\"\" data-start=\"9975\" data-end=\"9997\">\n<p class=\"\" data-start=\"9977\" data-end=\"9997\">High wear resistance<\/p>\n<\/li>\n<li class=\"\" data-start=\"9998\" data-end=\"10033\">\n<p class=\"\" data-start=\"10000\" data-end=\"10033\">Good vibration damping properties<\/p>\n<\/li>\n<\/ul>\n<h4 class=\"\" data-start=\"10035\" data-end=\"10071\"><strong data-start=\"10040\" data-end=\"10070\">Disadvantages of Cast Iron<\/strong>:<\/h4>\n<ul data-start=\"10072\" data-end=\"10129\">\n<li class=\"\" data-start=\"10072\" data-end=\"10081\">\n<p class=\"\" data-start=\"10074\" data-end=\"10081\">Brittle<\/p>\n<\/li>\n<li class=\"\" data-start=\"10082\" data-end=\"10104\">\n<p class=\"\" data-start=\"10084\" data-end=\"10104\">Low tensile strength<\/p>\n<\/li>\n<li class=\"\" data-start=\"10105\" data-end=\"10129\">\n<p class=\"\" data-start=\"10107\" data-end=\"10129\">Poor impact resistance<\/p>\n<\/li>\n<\/ul>\n<h4 class=\"\" data-start=\"10131\" data-end=\"10167\"><strong data-start=\"10136\" data-end=\"10166\">Advantages of Ductile Iron<\/strong>:<\/h4>\n<ul data-start=\"10168\" data-end=\"10254\">\n<li class=\"\" data-start=\"10168\" data-end=\"10191\">\n<p class=\"\" data-start=\"10170\" data-end=\"10191\">High tensile strength<\/p>\n<\/li>\n<li class=\"\" data-start=\"10192\" data-end=\"10220\">\n<p class=\"\" data-start=\"10194\" data-end=\"10220\">Superior impact resistance<\/p>\n<\/li>\n<li class=\"\" data-start=\"10221\" data-end=\"10254\">\n<p class=\"\" data-start=\"10223\" data-end=\"10254\">Greater toughness and ductility<\/p>\n<\/li>\n<\/ul>\n<h4 class=\"\" data-start=\"10256\" data-end=\"10295\"><strong data-start=\"10261\" data-end=\"10294\">Disadvantages of Ductile Iron<\/strong>:<\/h4>\n<ul data-start=\"10296\" data-end=\"10361\">\n<li class=\"\" data-start=\"10296\" data-end=\"10324\">\n<p class=\"\" data-start=\"10298\" data-end=\"10324\">Higher cost than cast iron<\/p>\n<\/li>\n<li class=\"\" data-start=\"10325\" data-end=\"10361\">\n<p class=\"\" data-start=\"10327\" data-end=\"10361\">More complex manufacturing process<\/p>\n<\/li>\n<\/ul>\n<h3 class=\"\" data-start=\"10368\" data-end=\"10407\">9. Frequently Asked Questions (FAQ)<\/h3>\n<h4 class=\"\" data-start=\"10409\" data-end=\"10465\"><strong data-start=\"10414\" data-end=\"10465\">1. Is cast iron more durable than ductile iron?<\/strong><\/h4>\n<p class=\"\" data-start=\"10467\" data-end=\"10791\">No, <strong data-start=\"10471\" data-end=\"10487\">ductile iron<\/strong> is generally more durable than <strong data-start=\"10519\" data-end=\"10532\">cast iron<\/strong>. While cast iron is durable in terms of wear resistance, ductile iron is much more <strong data-start=\"10616\" data-end=\"10636\">impact-resistant<\/strong> and <strong data-start=\"10641\" data-end=\"10652\">tougher<\/strong> due to its microstructure. This gives ductile iron a <strong data-start=\"10706\" data-end=\"10735\">higher fatigue resistance<\/strong>, which makes it more durable in demanding applications.<\/p>\n<hr class=\"\" data-start=\"10793\" data-end=\"10796\" \/>\n<h4 class=\"\" data-start=\"10798\" data-end=\"10883\"><strong data-start=\"10803\" data-end=\"10883\">2. Which material is better for automotive parts, cast iron or ductile iron?<\/strong><\/h4>\n<p class=\"\" data-start=\"10885\" data-end=\"11197\"><strong data-start=\"10885\" data-end=\"10901\">Ductile iron<\/strong> is typically better suited for automotive parts, especially those that are subjected to high stress, impact, or fatigue, such as <strong data-start=\"11031\" data-end=\"11046\">crankshafts<\/strong>, <strong data-start=\"11048\" data-end=\"11060\">brackets<\/strong>, and <strong data-start=\"11066\" data-end=\"11091\">suspension components<\/strong>. Its higher <strong data-start=\"11104\" data-end=\"11124\">tensile strength<\/strong> and <strong data-start=\"11129\" data-end=\"11142\">toughness<\/strong> make it a more reliable choice for these applications.<\/p>\n<hr class=\"\" data-start=\"11199\" data-end=\"11202\" \/>\n<h4 class=\"\" data-start=\"11204\" data-end=\"11271\"><strong data-start=\"11209\" data-end=\"11271\">3. Can ductile iron replace cast iron in all applications?<\/strong><\/h4>\n<p class=\"\" data-start=\"11273\" data-end=\"11622\">While <strong data-start=\"11279\" data-end=\"11295\">ductile iron<\/strong> is generally stronger and more versatile than <strong data-start=\"11342\" data-end=\"11355\">cast iron<\/strong>, it cannot replace cast iron in all applications. Cast iron is still used where its excellent <strong data-start=\"11450\" data-end=\"11465\">castability<\/strong>, <strong data-start=\"11467\" data-end=\"11479\">low cost<\/strong>, and <strong data-start=\"11485\" data-end=\"11506\">vibration damping<\/strong> properties are more important than strength, such as in <strong data-start=\"11563\" data-end=\"11580\">engine blocks<\/strong>, <strong data-start=\"11582\" data-end=\"11600\">piping systems<\/strong>, and <strong data-start=\"11606\" data-end=\"11621\">brake discs<\/strong>.<\/p>\n<hr class=\"\" data-start=\"11624\" data-end=\"11627\" \/>\n<h4 class=\"\" data-start=\"11629\" data-end=\"11706\"><strong data-start=\"11634\" data-end=\"11706\">4. What are the cost differences between cast iron and ductile iron?<\/strong><\/h4>\n<p class=\"\" data-start=\"11708\" data-end=\"12040\"><strong data-start=\"11708\" data-end=\"11724\">Ductile iron<\/strong> tends to be more expensive than <strong data-start=\"11757\" data-end=\"11770\">cast iron<\/strong> due to the additional processing involved in its production, including the addition of magnesium to form the spherical graphite structure. However, ductile iron\u2019s superior <strong data-start=\"11943\" data-end=\"11955\">strength<\/strong> and <strong data-start=\"11960\" data-end=\"11973\">toughness<\/strong> can justify its higher cost in many high-performance applications.<\/p>\n<hr class=\"\" data-start=\"12042\" data-end=\"12045\" \/>\n<h4 class=\"\" data-start=\"12047\" data-end=\"12119\"><strong data-start=\"12052\" data-end=\"12119\">5. How does the tensile strength of cast iron compare to steel?<\/strong><\/h4>\n<p class=\"\" data-start=\"12121\" data-end=\"12419\">While <strong data-start=\"12127\" data-end=\"12140\">cast iron<\/strong> is generally much stronger than many forms of steel in terms of <strong data-start=\"12205\" data-end=\"12229\">compression strength<\/strong>, <strong data-start=\"12231\" data-end=\"12240\">steel<\/strong> generally surpasses cast iron in terms of <strong data-start=\"12283\" data-end=\"12303\">tensile strength<\/strong>. <strong data-start=\"12305\" data-end=\"12314\">Steel<\/strong> is more suited for applications requiring high strength and resistance to <strong data-start=\"12389\" data-end=\"12403\">stretching<\/strong> or <strong data-start=\"12407\" data-end=\"12418\">tearing<\/strong>.<\/p>\n<hr class=\"\" data-start=\"12421\" data-end=\"12424\" \/>\n<h4 class=\"\" data-start=\"12426\" data-end=\"12497\"><strong data-start=\"12431\" data-end=\"12497\">6. Can ductile iron be used for high-temperature applications?<\/strong><\/h4>\n<p class=\"\" data-start=\"12499\" data-end=\"12807\"><strong data-start=\"12499\" data-end=\"12515\">Ductile iron<\/strong> can be used for moderate <strong data-start=\"12541\" data-end=\"12561\">high-temperature<\/strong> applications, but for extreme temperatures, materials such as <strong data-start=\"12624\" data-end=\"12633\">steel<\/strong> or <strong data-start=\"12637\" data-end=\"12660\">nickel-based alloys<\/strong> are typically preferred. Ductile iron has good thermal conductivity but is limited in its <strong data-start=\"12751\" data-end=\"12770\">heat resistance<\/strong> compared to some advanced materials.<\/p>\n<h3 class=\"\" data-start=\"12814\" data-end=\"12832\">10. Conclusion<\/h3>\n<p class=\"\" data-start=\"12834\" data-end=\"13180\">In summary, <strong data-start=\"12846\" data-end=\"12862\">ductile iron<\/strong> is stronger, tougher, and more resilient than <strong data-start=\"12909\" data-end=\"12922\">cast iron<\/strong>, especially in applications requiring high tensile strength and impact resistance. While <strong data-start=\"13012\" data-end=\"13025\">cast iron<\/strong> still holds an advantage in cost and <strong data-start=\"13063\" data-end=\"13078\">castability<\/strong>, <strong data-start=\"13080\" data-end=\"13096\">ductile iron<\/strong> provides greater flexibility in applications that demand <strong data-start=\"13154\" data-end=\"13178\">superior performance<\/strong>.<\/p>\n<p class=\"\" data-start=\"13182\" data-end=\"13361\">Understanding these differences is crucial when selecting materials for your specific needs, ensuring that you make the right choice based on the requirements of your application.<\/p>\n<h3>References:<\/h3>\n<ul>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Cast_iron\" target=\"_blank\" rel=\"nofollow noopener\">Cast Iron &#8211; Wikipedia<\/a><\/li>\n<li><a href=\"https:\/\/www.asminternational.org\/\" target=\"_blank\" rel=\"nofollow noopener\">ASM International &#8211; Materials Properties<\/a><\/li>\n<li><a href=\"https:\/\/www.engineeringtoolbox.com\/cast-iron-d_1320.html\" target=\"_blank\" rel=\"nofollow noopener\">Engineering ToolBox &#8211; Cast Iron Properties<\/a><\/li>\n<li><a href=\"https:\/\/www.materials.engineering.utoronto.ca\/ductile-iron.html\" target=\"_blank\" rel=\"nofollow noopener\">University of Toronto &#8211; Ductile Iron Overview<\/a><\/li>\n<li><a href=\"https:\/\/www.iron-foundry.com\/ductile-iron\" target=\"_blank\" rel=\"nofollow noopener\">The Foundry Zone &#8211; Ductile Iron<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>When comparing two popular types of iron used in industrial applications\u2014cast iron and ductile iron\u2014one of the most important factors to consider is their strength. Both materials are used for producing components that require high durability, but they possess distinct physical and mechanical properties that make them suitable for different applications. In this article, we\u2019ll [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2391,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"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":"default","adv-header-id-meta":"","stick-header-meta":"default","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":"var(--ast-global-color-4)","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":[1],"tags":[],"class_list":["post-2390","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>What is Stronger, Cast Iron or Ductile Iron? - Jingang LuoKaiwei<\/title>\n<meta name=\"description\" content=\"Explore the key differences between cast iron and ductile iron, including their strength, chemical composition, mechanical properties, and ideal applications. 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