45CrMo含C:0.38~0.48,Si:0.17~0.37,Mn:0.40~0.70,Cr:0.80~1.10,Mo:0.15~0.25,P:≤0.035,S:45CrMo含≤0.035,Ni:≤0.030,Cu:≤0.030.45CrMo含C:0.38~0.48,Si:0.17~0.37,Mn:0.40~0.70,Cr:0.80~1.10,Mo:0.15~0.25,P:≤0.035,S:45CrMo含≤0.035,Ni:≤0.030,Cu:≤0.030.45CrMo含C:0.38~0.48,Si:0.17~0.37,Mn:0.40~0.70,Cr:0.80~1.10,Mo:0.15~0.25,P:≤0.035,S:45CrMo含≤0.035,Ni:≤0.030,Cu:≤0.030.