310S
Data verified310S 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.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.08 |
| 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.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.4845 |
| aisi | 310S |
| jis | SUS310S |
| gb | 06Cr25Ni20 |
Compare side by side: 310S vs 310 · 310S vs 309S
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Furnace parts, heat exchangers, incinerator components, petrochemical cracking equipment, annealing fixtures.
Processing: Standard high-alloy welding practice; avoid the sigma-forming range in service design; machining slower than 304 due to strength and work hardening.
FAQ
- 310S or 253MA for furnace parts?
- 253MA holds strength and oxidation resistance to higher temperatures (about 1150 °C scaling limit) and can replace 310S in hotter zones; 310S is cheaper and more widely stocked.
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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.