310
Data verified310 is a 25Cr-20Ni heat-resistant austenitic grade with excellent oxidation resistance up to about 1035 °C in continuous service. Its higher carbon gives better high-temperature strength than 310S but more carbide precipitation on welding.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.25 |
| Si | ≤1.50 |
| Mn | ≤2.00 |
| P | ≤0.045 |
| S | ≤0.030 |
| Cr | 24.00–26.00 |
| Ni | 19.00–22.00 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Delivery condition | Annealed |
| Hardness | ≤217 HB (annealed) |
| Tensile strength | 515–690 MPa |
| Density | 7.90 g/cm³ |
| Max scaling temperature | ~1035 °C continuous |
Heat treatment
Solution anneal 1040–1180 °C, rapid cool. Avoid long exposure at 600–870 °C where sigma phase can form.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.4841 |
| aisi | 310 |
| jis | SUS310 |
| gb | 12Cr25Ni20 |
Compare side by side: 310 vs 310S · 310 vs 309
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Furnace muffles and burners, radiant tubes, kiln linings hardware, cryogenic structures, carburising boxes.
Processing: Weldable with matching high-alloy fillers; hot working is routine; cold forming needs higher forces than 304.
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Ask for a quotationVisit NasteelSource: ASTM A240 / EN 10088 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.