medium carbon steel

medium carbon steel

Medium-carbon steel has a carbon content of 0.3 to 0.55% and is used as a mechanical part and structural material.

Medium-carbon steel is used in retainers, office-equipment parts, friction plates, clutch parts, chain parts, washers.

Chemical composition

S30CM

C 0.27~0.33

Si 0.15~0.35

Mn 0.60~0.90

P 0.030 Max

S 0.030 Max

Cu 0.300 Max

Ni 0.200 Max

Cr 0.200 Max

Ni+CR 0.350 Max

S35CM

C 0.32~0.38

Si 0.15~0.35

Mn 0.60~0.90

P 0.030 Max

S 0.030 Max

Cu 0.300 Max

Ni 0.200 Max

Cr 0.200 Max

Ni+CR 0.350 Max

Cr 0.200 Max

S45CM

C 0.42~0.48

Si 0.15~0.35

Mn 0.60~0.90

P 0.030 Max

S 0.030 Max

Cu 0.300 Max

Ni 0.200 Max

Cr 0.200 Max

Ni+CR 0.350 Max

purpose of use

S30CM

retainers

S35CM(SAE1035)

office-equipment parts, friction plates

S45CM(SAE1045)

clutch parts, chain parts, retainer, washers