The 25Cr2MoV mechanical properties: tensile strength σb (MPa): 1090, yield strength σs (MPa): 1042, the elongation δ5 (%): 18, section shrinkage of ψ (%): 63, impact toughness αku (J / cm2): 213, hardness: 308HB. 25Cr2MoV alloy steel 
 25Cr2MoV heat treatment specifications: 890 ° C, 30min, oil quenching; 670 ° C, 60min, tempering, air-cooled. 25Cr2MoV microstructure: fire sorbitic. 25Cr2MoV chemical composition: C 0.22 ~ 0.29 25Cr2MoV carbon, silicon of Si 0.17 ~ 0.37, manganese Mn 0.40 ~ 0.70, sulfur S ≤ 0.035, phosphorus P ≤ 0.035, chromium Cr 1.50 ~ 1.80 0.15 ~ 0.30 of the vanadium V-Mo of Mo 0.25 ~~ 0.35.