1080 vs 1084
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.
1080
Carbon Steel
1080 sits at the eutectoid carbon level: fully pearlitic when normalized and capable of high hardness after quenching. It is a classic spring and blade steel for thicker sections than 1075 handles.
Standards: DIN C80 type (near) · AISI 1080 · JIS SK5 family (near) · GB 80
1084
Carbon Steel
1084 is a eutectoid-plus high carbon steel popular for blades and springs because its simple chemistry heat treats forgivingly in small workshops. The manganese level gives slightly deeper hardening than 1095.
Standards: DIN C85 type (near) · AISI 1084 · JIS SK5 family (near) · GB 85 (near)
Chemical composition compared (%)
| Element | 1080 | 1084 |
|---|---|---|
| C | 0.75–0.88 | 0.80–0.93 |
| Mn | 0.60–0.90 | 0.60–0.90 |
| P | ≤0.040 | ≤0.040 |
| S | ≤0.050 | ≤0.050 |
Properties compared
| Property | 1080 | 1084 |
|---|---|---|
| Tensile strength | 800–950 MPa (normalized, typ.) | 820–980 MPa (normalized, typ.) |
| Hardness (spring temper) | 45–52 HRC typical | — |
| Density | 7.85 g/cm³ | 7.85 g/cm³ |
| Hardness (hardened) | — | 58–63 HRC (thin sections) |
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: 1080 · 1084. Substitution decisions for certified parts stay with the design authority.