253MA vs 310S
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.
253MA
Stainless Steel
253MA is a nitrogen-alloyed, cerium-bearing heat-resistant austenitic stainless (a proprietary Outokumpu grade under UNS S30815). Its silicon and rare-earth additions give oxidation resistance to about 1150 °C with creep strength well above 310S.
Standards: DIN 1.4835 · AISI UNS S30815 (253MA)
310S
Stainless Steel
310S is the low-carbon version of 310 and the most common heat-resistant sheet and plate grade for welded furnace fabrications. It keeps the oxidation resistance of 310 with better weld-zone behaviour.
Standards: DIN 1.4845 · AISI 310S · JIS SUS310S · GB 06Cr25Ni20
Chemical composition compared (%)
| Element | 253MA | 310S |
|---|---|---|
| C | 0.05–0.10 | ≤0.08 |
| Si | 1.40–2.00 | ≤1.50 |
| Mn | ≤0.80 | ≤2.00 |
| P | ≤0.040 | ≤0.045 |
| S | ≤0.030 | ≤0.030 |
| Cr | 20.00–22.00 | 24.00–26.00 |
| Ni | 10.00–12.00 | 19.00–22.00 |
| N | 0.14–0.20 | — |
| Ce | 0.03–0.08 | — |
Properties compared
| Property | 253MA | 310S |
|---|---|---|
| Delivery condition | Solution annealed | Annealed |
| Hardness | ≤217 HB (annealed) | ≤217 HB (annealed) |
| Tensile strength | 650–850 MPa | 515–690 MPa |
| Density | 7.80 g/cm³ | 7.90 g/cm³ |
| Max scaling temperature | ~1150 °C | ~1035 °C continuous |
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: 253MA · 310S. Substitution decisions for certified parts stay with the design authority.