China Standard: GB/T3077-1999
Japanese standard JIS G4053: 2003
American Standard ASTM A29M: 2005
Chemical composition
Mass fraction (%):
Carbon C: 0.37 ~ 0.45
Si Si: 0.17 ~ 0.37
Manganese Mn: 0.90 ~ 1.20
Sulfur S: to allow the residual content of ≤ 0.035
Phosphorus P: allow the residual content ≤ 0.035
Chromium Cr: 0.90 ~ 1.20
Ni: to allow the residual content of ≤ 0.030
Copper Cu: to allow the residual content ≤ 0.030
Mechanical properties
Sample size [blank]
25mm
[Heat]
Quenching temperature (℃): 840; Coolant: Oil
Tempering heating temperature (℃): 550; coolant: water, oil
[Mechanical properties]
Tensile strength σb (MPa): ≥ 980 (100)
Yield strength σs (MPa): ≥ 835 (85)
Elongation δ5 (%): ≥ 9
Reduction of area ψ (%): ≥ 45
Impact energy Akv (J): ≥ 47
Impact toughness αkv (J/cm2): ≥ 59 (6)
Brinell hardness (HBS100/3000) (annealing or tempering condition): ≦ 229
Delivery status: to heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be indicated in the contract.
Key Features
Hardenability, high strength. Alternative 42CrMo and 40CrNi.
Application examples
Manufacture of high-speed and high bending load operating conditions of the pump shaft and connecting rod, no momentum impact load of gear pumps, rotor pump, clutch, pressure vessels cover bolts.
