20CrMo has high hardenability, no temper brittleness, good weldability, little tendency to form cold cracks, and good machinability and cold deformation plasticity. It is generally used in tempered or carburized and quenched condition, for manufacturing high-pressure pipes and various fasteners, as well as more carbonized parts such as gears and shafts, which operate in non-corrosive media and at temperatures below 250°C, containing nitrogen and hydrogen.

Grade: 20CrMo Alloy Structural Steel

Standard:

Standard Correspondence: JIS G4053:2003

ASTM A29M：2005

ISO 683-18：1996

Chemical Composition:

Carbon (C): 0.17～0.24

20CrMo round steel

Silicon (Si): 0.17～0.37

Manganese (Mn): 0.40～0.70

Sulfur (S): Allowable residual content ≤ 0.035

Phosphorus P: Allowable residual content ≤ 0.035

Chromium (Cr): 0.80～1.10

Molybdenum (Mo): 0.15~0.25

Nickel (Ni): Allowable residual content ≤ 0.3

Copper (Cu): Allowable residual content ≤ 0.3

Mechanical properties:

Tensile Strength σb (MPa): ≥885 (90)

Yield Strength σs (MPa): ≥685 (70)

δ5 (%) Elongation: ≥12

Section Reduction Ratio ψ (%): ≥50

Impact Work Akv (J): ≥78

Impact toughness value αkv (J/cm²): ≥98(10)

Hardness: ≤197 HB

Sample Size: Sample blank size is 15mm

Application

Gears, fasteners, flanges, nuts, etc.