20MnCr5 is a versatile case-hardening steel known for its excellent wear resistance, toughness, and strength after carburizing. It has a composition that includes approximately 0.20% carbon, 1.0-1.3% manganese, and 1.0-1.4% chromium, which contribute to its hardenability and mechanical properties. 20MnCr5 is typically supplied in the annealed condition and can be carburized to produce a hard, wear-resistant surface layer while maintaining a tough, ductile core. This dual property makes it particularly suitable for parts that endure high wear and stress, such as gears, shafts, crankshafts, and camshafts.

The material's high fatigue strength and ability to withstand impact and stress under load make it ideal for automotive and heavy machinery applications. Its good machinability in the annealed state and the ability to achieve a fine surface finish after hardening further enhance its utility in precision components. Overall, 20MnCr5 is highly valued in industries where durability, performance, and reliability are critical.