steel round bar 40Cr/sae 5140 for 8.8 grade bolt
Grade:40Cr/SAE5140/C/SCr440
1.Size&Tolerance

Sizes details diameter 8-310mm
length 1-12m(canbe customerized)
Sizes tolerance length -0/50mm(max)
Straightness 3mm/m(max)

2.Chemical compisition
C Si Mn Cr Ni(≤) Cu(≤) P(≤) S(≤)
0.37-0.44 0.17-0.37 0.5-0.8 0.8-1.0 0.3 0.03 0.035 0.035

3.Mechanical property

Tensile Strength Yield strength Elongation Reduction Area
Mpa (min) Mpa(min) %(min) %(min)
980 785 9 45

steel round bar 40Cr/sae 5140 for 8.8 grade bolt
Grade:40Cr/SAE5140/C/SCr440

*Bars from different heats will not be mixed and dispatched.
*Bars will be bundles and securely metal strapped in 3 min places of the bar length and tagged properly.
*For further processing products such as cold drawn/peeled or heat treated goods, plastics bag wrapped or pallet loading is available according to customer's demands.