55Cr3,51CrV4,SUP7,SUP9,SUP10 spring steel round bar 

Germany DIN 51CrV4 Cold working alloy tool steel 

51CrV4 is used widely in the motor vehicle industry and is suitable for many general engineering applications that require high tensile strength and toughness with spring steel characteristics. Typical applications include spindles, pumps, gears crankshafts and steering knuckles

MATERIAL SPECIFICATIONS  

DIN EN 10083-2/3 (2006), DIN 17212 (1972)

CHEMICAL COMPOSITION (WEIGHT %)     

C (％):    0.47～0.55
Si(％):    ≤0.40
Mn(％):   0.70～1.10
P(％)≤:   0.035
S(％)≤:   0.035
Cr(％):    0.90~1.20
Mo(％):   -
Other(％): V0.10~0.25