30CrNi3A 
 Grade: 30CrNi3 Standard: GB / T 3077-1988 


 ● Chemical Composition: C: 0.27 ~ 0.33 Si Si: 0.17 ~ 0.37 Manganese Mn: 0.30 ~ 0.60 S S: to allow the residual phosphorus content ≤ 0.035 P: ≤ 0.035 to allow the residual content of chromium Cr: 0.60 ~ 0.90 Ni-Ni: 2.75 ~ * Copper Cu: ≤ 0.030 to allow the residual content 


 ● Mechanical Properties: Tensile σb (MPa): ≥ 980 (100) yield strength σs (MPa): ≥ 785 (80) elongation δ5 (%): ≥ 9 Reduction of area ψ (%): ≥ 45 impacts Power Akv (J): ≥ 63 impact toughness αkv (J/cm2): ≥ 78 (8) Hardness: ≤ 241HB sample size: Sample size of 25mm rough 


 ● Heat treatment and microstructure specifications: Heat treatment specifications: quenching 820 ℃, oil-cooling; tempering 500 ℃, water-cooled, oil-cooling. 

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