Gear Steel: 20MnCr5
Implementation of the standards: EN 10084-1998
● Features and application:
Of steel imported from Germany, the equivalent of China's 20CrMn steel is hardened steel type can also be used for quenched and tempered steel. Good hardenability, heat deformation small, low-temperature toughness, good cutting performance, but poor welding. Can be used for carburized parts and a larger cross-section, high load conditioning parts such as gears, shafts, worm, sleeve, friction wheels.
● Chemical Composition:
Carbon C: 0.17 ~ 0.22
Si Si: ≤ 0.40
Manganese Mn: 1.10 ~ 1.40
Sulfur S: 0.010 ~ 0.035
Phosphorus P: ≤ 0.035
Chromium Cr: 1.00 ~ 1.30
● Mechanical Properties:
Tensile strength σb (MPa): 1482
Conditions yield strength σ0.2 (MPa): 1232
Elongation δ5 (%): 13
Reduction of area ψ (%): 57
Impact toughness αku (J/cm2): 73
Hardness: 357HB
Sample size: a test material
● Heat treatment and microstructure specifications:
Heat treatment specifications: 900 ℃ +870 ℃ oil quenching oil quenched, 200 ℃ tempering.
Microstructure: martensite
