{"id":3380,"date":"2025-05-21T17:21:39","date_gmt":"2025-05-21T09:21:39","guid":{"rendered":"https:\/\/www.ductileironsuppliers.com\/?p=3380"},"modified":"2025-05-30T10:27:52","modified_gmt":"2025-05-30T02:27:52","slug":"ductile-iron-grades-comparison-mechanical-properties-applications-and-standards","status":"publish","type":"post","link":"https:\/\/www.ductileironsuppliers.com\/ar\/ductile-iron-grades-comparison-mechanical-properties-applications-and-standards.html","title":{"rendered":"\u0645\u0642\u0627\u0631\u0646\u0629 \u062f\u0631\u062c\u0627\u062a \u062d\u062f\u064a\u062f \u0627\u0644\u062f\u0643\u062a\u0627\u064a\u0644: \u0627\u0644\u062e\u0648\u0627\u0635 \u0627\u0644\u0645\u064a\u0643\u0627\u0646\u064a\u0643\u064a\u0629 \u0648\u0627\u0644\u062a\u0637\u0628\u064a\u0642\u0627\u062a \u0648\u0627\u0644\u0645\u0639\u0627\u064a\u064a\u0631"},"content":{"rendered":"

Ductile iron (nodular iron) offers a versatile range of grades tailored for industrial applications, from water infrastructure to automotive components.The classification of ductile iron into various grades is primarily based on its mechanical properties, such as tensile strength, yield strength, and elongation. These grades are standardized by organizations like ASTM International, with ASTM A536 being a widely recognized specification that outlines the mechanical requirements for ductile iron castings.<\/p>\n

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Ductile Iron Grades Comparison<\/figcaption><\/figure>\n

Mechanical Properties of Common Ductile Iron Grades<\/h2>\n

The mechanical properties of ductile iron vary across different grades, influencing their suitability for various applications. Below is a detailed comparison of common ductile iron grades as per ASTM A536:<\/span><\/p>\n

\n
\n\n\n\n\n\n\n\n\n\n
Grade<\/th>\nTensile Strength (psi)<\/th>\nYield Strength (psi)<\/th>\nElongation (%)<\/th>\nBrinell Hardness<\/th>\nTypical Applications<\/th>\n<\/tr>\n<\/thead>\n
60-40-18<\/span><\/td>\n60,000<\/span><\/td>\n40,000<\/span><\/td>\n18<\/td>\n149-187<\/span><\/td>\nPressure pipes, fittings<\/span><\/td>\n<\/tr>\n
65-45-12<\/span><\/td>\n65,000<\/span><\/td>\n45,000<\/span><\/td>\n12<\/td>\n170-207<\/span><\/td>\nAutomotive components<\/span><\/td>\n<\/tr>\n
80-55-06<\/span><\/td>\n80,000<\/span><\/td>\n55,000<\/span><\/td>\n6<\/td>\n187-255<\/span><\/td>\nGears, crankshafts<\/span><\/td>\n<\/tr>\n
100-70-03<\/span><\/td>\n100,000<\/span><\/td>\n70,000<\/span><\/td>\n3<\/td>\n217-269<\/span><\/td>\nHigh-strength applications<\/span><\/td>\n<\/tr>\n
120-90-02<\/span><\/td>\n120,000<\/span><\/td>\n90,000<\/span><\/td>\n2<\/td>\n240-300<\/span><\/td>\nHeavy-duty machinery<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
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These grades demonstrate a trade-off between strength and ductility; as tensile and yield strengths increase, elongation tends to decrease, affecting the material’s ability to deform plastically before fracture.<\/span><\/p>\n

Microstructure and Its Influence on Properties<\/h2>\n

The microstructure of ductile iron significantly influences its mechanical properties. The presence of spheroidal graphite nodules within the iron matrix reduces stress concentration points, enhancing ductility and impact resistance.<\/span><\/p>\n

The matrix structure, which can be ferritic, pearlitic, or a combination of both, also affects the material’s properties:<\/span><\/p>\n