20CrMo Steel Equivalent, Chemical Composition, Mechanical Properties

20CrMo alloy steel

GB 20CrMo Steel is a kind of Chinese alloy steel for engineering and mechanical structure purposes, which is generally used for quenching or tempering or carburizing and quenching. 20CrMo material has high heat resistance, good hardenability, no quench brittleness, cold deformation plasticity, good machinability and weldability.

Forms

20CrMo alloy steel is used in the manufacture of non-corrosive media in chemical equipment and high pressure pipes, fasteners, steam turbines, boiler blades and forgings with working temperatures below 250 °C, and important carburizing parts, such as gears and axles in machines in general. . It can also be used in place of 1Cr13 steel to manufacture medium and low pressure steam turbines in the pressure stage working blades of the superheated steam zone.

data sheet

Chemical Composition of 20CrMo Steel

Mechanical Properties of 20CrMo Alloy Steel

• Yield strength: ≥ 685 MPa
• Tensile strength: ≥ 885 MPa
• Elongation: ≥12%
• Reduction rate in area: ≥50%
• Impact absorption energy: ≥ 78 J
• Brinell hardness of material: ≤ 197 (steel rod annealed or quenched at high temperature)
• Sample size: 15mm

Heat Treatment Specification

• First quenching heating temperature: 880°C (quenching agent: water, oil)
• Quenching heating temperature: 500°C (agent – ​​water, oil)

Equivalent Notes

20CrMo material equivalent to US ASTM, European German DIN EN, British BS EN, French NF EN, Japanese JIS and ISO standard. (For reference)