What Is 310S (UNS S31008) Stainless Steel
Jan 22, 2026
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310S (UNS S31008, 1.4845, SUS310S) is a high-Cr-Ni austenitic stainless steel, with excellent high-temperature oxidation and corrosion resistance, higher than 309S.
Equivalent Grades (Horizontal)
UNS: S31008 | JIS: SUS310S | GB: 06Cr25Ni20 | EN: X5CrNi25-21
Chemical Composition (wt%, Horizontal)
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 | Fe: Balance
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 310 | min. max. |
- 0.25 |
- 2.00 |
- 1.50 |
- 0.045 |
- 0.030 |
24.0 26.0 |
- | 19.0 22.0 |
- |
| 310S | min. max. |
- 0.08 |
- 2.00 |
- 1.50 |
- 0.045 |
- 0.030 |
24.0 26.0 |
- | 19.0 22.0 |
- |
Key Properties (20°C, Annealed, Horizontal)
Density: 7.98g/cm³ | Melting Point: 1400-1450°C | Tensile Strength: ≥515N/mm² | 0.2% Yield Strength: ≥205N/mm² | Elongation: ≥40% | Hardness (HB): ≤217
Core Characteristics
Superior high-temperature oxidation resistance (up to 1150°C); good creep strength at high temp; excellent resistance to high-temp corrosive gases; suitable for high-temp industrial furnaces.
309S vs 310S (Horizontal)
Cr Content: 309S (22.00-24.00%) | 310S (24.00-26.00%) | High-Temp Service: 309S (≤1050°C) | 310S (≤1150°C) | Oxidation Resistance: 309S (Excellent) | 310S (Superior)
304 Stainless Steel Suppliers
If you have project requirements for 304 stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: info@gneestainless.com
Testing and Documentation: Factory test certificate, EN 10204 3.1, chemical report, mechanical report, destructive testing report, non-destructive testing report, PMI test report, visual inspection report, third-party inspection report, NABL certified laboratory report.
Packaging: Wooden crate packaging, bubble wrap packaging, steel strapping, or packaging according to customer requirements.
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