4130 chemical compostion:

C:0.28%~0.33%;   Mn:0.4%~0.6%;     P&S:Max.0.04%,Si:0.15%~0.35%; Cr:0.8%~1.1%;Mo:0.15%~0.25

Mechanical properties:

condition     Ultimate strength    Yield Poilt               Elongation              RHB

                   KSI    MPA              KSI    MPA                %

HR              90     621                70    483                  20                       89

SR              105   724                 85    586                  10                       95

A                75    517                  55    379                  30                       81

N                90    621                   60    414                  20                       89

HR: Hot Rolled.          SR:Stress Relieved

A:   Annealed             N:Normalized