42CrMo Alloy Steel Properties and Applications

42CrMo is a high-strength alloy steel widely used for heavy-duty mechanical components. It offers excellent toughness, wear resistance, and fatigue strength.

It contains 0.38–0.45% carbon, 0.9–1.2% chromium, and 0.15–0.3% molybdenum, improving hardenability and performance after heat treatment.

Commonly delivered in quenched and tempered (Q&T) condition for balanced strength and toughness.

Applications include gears, shafts, crankshafts, bolts, machine tool parts, and mining equipment. Known for reliable performance under high loads.

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