310S stainless steel plate is the standard heat-resistant austenitic grade for high-temperature service — stable up to about 1,040 °C continuous, with excellent oxidation resistance and no embrittlement issues of ferritic heat-resisting steels. ZEMSS supplies GB-standard 310S plate from major Chinese mills with full mill documentation, plus cutting and fabrication from our Taiyuan facility.
Product Specifications
| Parameter | Specification |
|---|---|
| Grade | 310S (GB 06Cr25Ni20 · UNS S31008) |
| Standards | GB/T 4237 · ASTM A240 equivalent · EN 10088-2 equivalent |
| Thickness | 3 – 60 mm typical range (confirm per size) |
| Width | 1,500 / 1,800 / 2,000 mm standard |
| Length | 3,000 / 6,000 mm standard · cut-to-size available |
| Surface | No.1 hot-rolled pickled (standard) |
| Certification | Mill test certificate, EN 10204 3.1 type, heat-number traceable |
International Grade Equivalents
| Grade we quote | GB designation | UNS | ASTM / AISI | EN number | JIS |
|---|---|---|---|---|---|
| 310S | 06Cr25Ni20 (old: 0Cr25Ni20) | S31008 | 310S | 1.4845 | SUS310S |
Chemical Composition & Mechanical Properties
| C max | Cr | Ni | Mn max | Si max |
|---|---|---|---|---|
| 0.08% | 24.0–26.0% | 19.0–22.0% | 2.0% | 0.75% |
| Yield strength ≥ | Tensile strength ≥ | Elongation ≥ | Continuous service |
|---|---|---|---|
| 205 MPa | 515 MPa | 40% | Up to ~1,040 °C in oxidizing atmosphere |
The high chromium-nickel content (25Cr-20Ni) is what gives 310S its oxidation resistance and high-temperature strength — and its premium over 304/316L.
Performance & Selection Guide
Choose 310S when: continuous operating temperature exceeds what 304/316L can tolerate (roughly 870 °C+), and the atmosphere is oxidizing — furnace parts, kiln furniture, heat shields, burner components.
Consider 321 instead when: temperatures sit in the 500–850 °C band and thermal cycling is frequent — titanium stabilization adds protection against sensitization; see our 321 plate page.
Welding note: 310S welds readily with matching fillers; keep heat input moderate. For fabricated assemblies, see our welding process guide.
Typical Applications
- Furnace linings, kiln furniture, heat-treatment baskets and trays
- Heat shields, radiant tubes and burner parts
- Boiler and heat-exchanger high-temperature sections — see our boiler and heat exchanger fabrication
- Exhaust and flue components at elevated temperature
- Glass and ceramic processing equipment
FAQ
What is the maximum service temperature of 310S?
About 1,040 °C continuous in oxidizing atmosphere; intermittent service slightly higher. In reducing or carburizing atmospheres the limit depends on gas composition — send us the service conditions for advice.
310S or 321 — which for my temperature?
Roughly: below ~850 °C with thermal cycling, 321 is often the better-value choice; above that, or for maximum oxidation resistance, 310S.
Is 310S magnetic?
No — as a fully austenitic grade, 310S is non-magnetic in the annealed condition.
Do plates ship with certificates?
Yes — mill test certificate (EN 10204 3.1 type) with heat-number traceability.
Can you fabricate 310S?
Yes — cutting to size, forming and welding from our Taiyuan facility, including high-temperature assemblies.
How to Order
Send thickness, sizes, quantity and service temperature — you receive a line-item quotation within two working days with stock confirmation. Mill certificates travel with every delivery. Request a quote or browse our full product range.