50CrVa CHEMICAL COMPOSITION:

C :0.46~0.54     Si:0.17~0.37     Mn:0.50~0.80      S :≤0.030     P :≤0.030     Cr:0.80~1.10       Ni:≤0.35  
Cu:≤0.25          V :0.10~0.20

STANDARD: 

GB/T 5128

ASTM A401(M)

ASTM A231(M)

ASTM A877(M)