35CrMoV, alloy structural steel. Uniform digital code: A31352 

 Standard: GB / T 3077-1988 

 Chemical composition 
 [Chemical composition] (wt) (%) 

 Carbon C: 0.30 ~ 0.38 

 Si Si: 0.17 ~ 0.37 

 Manganese Mn: 0.40 ~ 0.70 

 S S: to allow the residual content ≤ 0.035 

 Phosphorus P: allow the residual content ≤ 0.035 

 Chromium Cr: 1.00 ~ 1.30 

 Ni: to allow the residual content ≤ 0.030 

 Copper Cu: ≤ 0.030 to allow the residual content 

 Vanadium V: 0.10 ~ 0.20 

 Mo Mo: 0.20 ~ 0.30 

 Mechanical Properties 
 [Mechanical Properties] 

 Sample blank size (mm): 25 

 Heat Treatment: 

 First quenching temperature (℃): 900; Coolant: Oil 

 Second quenching temperature (℃): 

 Tempering heating temperature (℃): 630; coolant: water, oil 

 Tensile strength σb (MPa): ≥ 1080 (110) 

 Yield strength σs (MPa): ≥ 930 (95) 

 Elongation δ5 (%): ≥ 10 

 Reduction of area ψ (%): ≥ 50 

 Impact energy Akv (J): ≥ 71 

 Impact toughness αkv (J/cm2): ≥ 88 (9) 

 Brinell hardness (HBS100/3000) (annealing or tempering state): ≦ 241 

 Delivery Status 
 Delivery status: to heat treatment (normalizing, annealing, or tempering) or heat treatment delivery, delivery status should be indicated in the contract 

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