Alloy structural steel what its the 20CrMn hardness?

20CrMn carburized steel has high strength and toughness, and good hardenability. The performance obtained after heat treatment is better than 20Cr. The quenching deformation is small, the low temperature toughness is good, and the machinability is good; but the welding performance is low. Generally used after carburizing, quenching or quenching and tempering.

Mechanical properties

Tensile strength σb (MPa): ≥930(95)

Yield strength σs (MPa): ≥735(75)

Elongation δ5 (%): ≥10

Reduction of area ψ (%): ≥45

Impact energy Akv (J): ≥47

Impact toughness value αkv (J/cm2): ≥59(6)

20CrMn hardness (HBS100/3000) (annealed or high temperature tempered state): ≦187

Application examples

20CrMn alloy structural steel is used for manufacturing and heavy-duty hardened and tempered parts with large cross-sections and carburized parts with small cross-sections. It can also be used to manufacture small and medium-sized parts with medium load and low impact, instead of 20CrNi, such as gears, shafts, friction wheels, The sleeve of the worm governor, etc.