What is the chemical composition of 42CrMo steel to GB/T 3077 standard?

GB/T 3077 42CrMo steel is a high-strength alloy steel. It is similar to the material ISO 42CrMo4, JIS SCM440, DIN 42CrMo4 or 1.7225, ASTM4140 or G41400.
Chemical composition of 42CrMo steel
Carbon: 0.38~0.45%
Silicon: 0.17~0.37%
Manganese: 0.50~0.80%
Sulfur: ≤0.035%
Phosphorus: ≤0.035%
Chromium: 0.90~1.20%
Nickel: ≤0.30%
Copper: ≤0.30%
Molybdenum: 0.15~0.25%
 
GB/T 3077 42CrMo steel has high strength and toughness, good hardenability, no obvious temper brittleness, high fatigue limit and multiple impact resistance after quenching and tempering, and good low temperature impact toughness. The kind of alloy steel is suitable for manufacturing large and medium-sized plastic molds that require certain strength and toughness.

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