S45C Carbon Steel Coil for Mechanical Parts and Heat Treatment Applications

Unlike low-carbon steel coils designed for stamping and deep drawing, S45C carbon steel coil is primarily selected for strength, wear resistance, and heat treatment capability.

With a carbon content of approximately 0.42–0.48%, S45C offers higher hardness and better mechanical performance than mild steel grades. It is widely used by manufacturers producing machine components, wear parts, industrial equipment, and flame-cut steel blanks.

For buyers requiring material that can be machined and subsequently quenched and tempered, S45C remains one of the most commonly specified medium-carbon steel grades.

Product Specifications

Item

Details

Standard

JIS G4051

Equivalent Grades

C45, 1045, S45C

Supply Condition

Hot Rolled, Pickled

Thickness

2.0 mm – 20 mm

Width

600 mm – 2000 mm

Surface Finish

Black, Pickled, Oiled

Processing Service

Slitting, Cut-to-Length, Flame Cutting

Payment Terms

T/T, L/C

Trade Terms

FOB, CFR, CIF

Item

Value

Carbon (C)

0.42 – 0.48%

Manganese (Mn)

0.60 – 0.90%

Silicon (Si)

0.15 – 0.35%

Phosphorus (P)

≤ 0.030%

Sulfur (S)

≤ 0.035%

Tensile Strength

570 – 700 MPa

Yield Strength

≥ 340 MPa

Elongation

≥ 16%

Hardness

170 – 230 HB

Why Buyers Choose S45C Coil

Suitable for Heat Treatment

One of the biggest advantages of S45C is its ability to achieve higher hardness after quenching and tempering. This makes it suitable for parts exposed to friction, impact, or repeated loading.

Better Wear Resistance Than Mild Steel

Compared with low-carbon grades such as 1008 or 1010, S45C provides improved resistance to surface wear, making it a common choice for machinery components.

Ideal for Flame Cutting and Plate Processing

Many customers purchase S45C coil for cut-to-size production. After leveling and cutting, the material can be processed into machine bases, wear plates, brackets, and mechanical parts.

Good Balance Between Cost and Strength

For applications that do not require alloy steel grades such as 4140 or 42CrMo4, S45C often provides a cost-effective solution with reliable mechanical properties.