1140 vs 1141
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.
1140
Carbon Steel
1140 is the resulfurized free-machining counterpart of 1040, with the same carbon class but sulfur added for chip breaking. It serves screw-machine production of medium-strength parts.
Standards: AISI 1140
1141
Carbon Steel
1141 pairs 1040-class carbon with 1.35–1.65% manganese and resulfurization, giving free-machining bar with better hardenability than 1140. It is a popular cold drawn grade for machined shafts and studs.
Standards: AISI 1141
Chemical composition compared (%)
| Element | 1140 | 1141 |
|---|---|---|
| C | 0.37–0.44 | 0.37–0.45 |
| Mn | 0.70–1.00 | 1.35–1.65 |
| P | ≤0.040 | ≤0.040 |
| S | 0.08–0.13 | 0.08–0.13 |
Properties compared
| Property | 1140 | 1141 |
|---|---|---|
| Tensile strength | 540–640 MPa (hot rolled, typ.) | 560–670 MPa (hot rolled, typ.) |
| 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: 1140 · 1141. Substitution decisions for certified parts stay with the design authority.