15CrMo 

 Executive Standard: GB / T 3077-1999 

 Chemical Composition (%) 

 C: 0.12 ~ 0.18 Si: 0.17 ~ 0.37 Mn: 0.40 ~ 0.70 S: ≤ 0.035 P: ≤ 0.035 Cr: 0.80 ~ 1.10 Ni ≤ 0.30 Cu ≤ 0.30 Mo: 0.40 ~ 0.55 

 Mechanical properties: 

 Σb (MPa), tensile strength: ≥ 440 (42) yield strength σs (MPa): ≥ 295 (27) the elongation δ5 (%): ≥ 22 

 Section shrinkage rate of ψ (%): ≥ 60 Impact Energy Akv (J): ≥ 94 impact toughness values ??αkv (J/cm2): ≥ 137 (14) 

 Hardness: ≤ 179HB 

 Sample size: sample blank size of 30mm 

 Specification of heat treatment: hardening 900 ° C, air-cooled; tempering 650 ° C, air-cooled. 

 Main purposes: 

 Features and Scope: pearlite hot strength steel, cold-strain plasticity and machinability are good weldability is acceptable. The parameters used in the manufacture of steam up to 510 ℃ of the main duct, the wall temperature of 540 ℃ overheating tube, can also produce a variety of elastic components in the high temperature 

 Delivery status: to heat treatment (normalizing, annealing, or high-temperature tempering) or heat treatment state of delivery, the delivery status should be indicated in the contract.