1050 vs S50C
These two grades are listed as equivalents of each other: their chemistry windows overlap and they serve the same applications. They are not always identical — check the differences below before substituting, especially in certified designs.
1050
Carbon Steel
1050 is a medium-high carbon steel whose chemistry matches JIS S50C and EN C50. It is used for wear-exposed shafts, springs of simple form and parts that are flame or induction hardened.
Standards: DIN 1.0540 (C50) · AISI 1050 · JIS S50C · GB 50
S50C
Carbon Steel
S50C is the JIS medium-carbon steel slightly richer in carbon than S45C/1045, popular in Asian supply chains for machine parts, shafts and mold plates.
Standards: DIN 1.0540 (C50) · AISI 1050 · JIS S50C · GB 50
Chemical composition compared (%)
| Element | 1050 | S50C |
|---|---|---|
| C | 0.48–0.55 | 0.47–0.53 |
| Mn | 0.60–0.90 | 0.60–0.90 |
| P | ≤0.040 | ≤0.030 |
| S | ≤0.050 | ≤0.035 |
| Si | — | 0.15–0.35 |
Properties compared
| Property | 1050 | S50C |
|---|---|---|
| Tensile strength | 620–740 MPa (normalized, typ.) | 610–760 MPa (normalized) |
| Hardness | 55+ HRC surface by induction | — |
| Density | 7.85 g/cm³ | 7.85 g/cm³ |
Sourcing either grade?
Nasteel stocks both families from Shenzhen with EN 10204 3.1 mill certificates by heat number.
Ask for a quotationSee full data sheets: 1050 · S50C. Substitution decisions for certified parts stay with the design authority.