Material Name: Gear Steel 35CrMo

Standard: GB / T 3077-1988
● Features and Scope:
Have a high static strength, impact toughness and high fatigue limit, high hardenability than 40Cr, under high temperature creep strength and rupture strength, long-term working temperature up to 500 ℃; cold deformation plasticity moderate, poor weldability. Important structural parts used for work under high loads, such as vehicle and engine transmission parts; turbogenerator rotor shaft, heavy duty drive shaft, a large cross-section parts
● Chemical Composition:
Carbon C: 0.32 ~ 0.40
Si Si: 0.17 ~ 0.37
Mn Mn: 0.40 ~ 0.70
Sulfur S: to allow the residual content ≤0.035
Phosphorus P: to allow the residual content ≤0.035
Chromium Cr: 0.80 ~ 1.10
Ni: to allow the residual content ≤0.030
Cu: to allow the residual content ≤0.030
Mo Mo: 0.15 ~ 0.25
● Mechanical Properties:
Tensile strength σb (MPa): ≥985 (100)
Yield strength σs (MPa): ≥835 (85)
Elongation δ5 (%): ≥12
Reduction of ψ (%): ≥45
Impact energy Akv (J): ≥63
Impact toughness αkv (J / cm2): ≥78 (8)
Hardness: ≤229HB
Sample size: Sample size is 25mm rough
● Heat treatment and microstructure specifications:
Heat treatment specifications: quenching 850 ℃, oil cooling; tempering 550 ℃, water, oil cooling.
● Delivery status: to heat treatment (normalizing, annealing or tempering) or without heat treatment delivery, the delivery status should be specified in the contract