310S Stainless Steel
310S, Chinese grade 06Cr25Ni20, is a high chromium nickel austenitic stainless steel. It contains 24% to 26% chromium, 19% to 22% nickel, and carbon limited to ≤0.08%. The source lists continuous service below 1150℃ and short term exposure up to 1200℃. It resists oxidation, sulfuric and nitric acid, and high temperature sulfides. Its face centered cubic structure supports creep strength and toughness at elevated temperature, while the alloy is described as nonmagnetic and readily weldable.
Product details
Chemical composition
| 310S | C | Si | Mn | P | S | Ni | Cr |
|---|---|---|---|---|---|---|---|
| min | – | – | – | – | – | 19.0 | 24.0 |
| max | 0.08 | 1.5 | 2.0 | 0.045 | 0.03 | 22.0 | 26.0 |
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Grade equivalents
| English Item | UNS | W.Nr. | JIS | GB/T | Other Grades |
|---|---|---|---|---|---|
| 310S | S31008 | 1.4548 1.4951 | SUS310S | 06Cr25Ni20 | 10X23H18 Z12CN 25-20 X12CrNi 25-21 X12CrNi 23-12 |
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Physical properties
| Density g/cm³ | 7.98 |
|---|---|
| Melting range ℃ | 1398-1450 |
| Thermal conductivity (100℃) λ/(W/m•℃) | 14.2 |
| Specific heat J/kg•℃ | 500 |
| Elastic modulus GPa | 200 |
| Electrical resistivity μΩ•m | 0.78 |
| Linear expansion coefficient a/10-6℃-1 | 15.9 |
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Mechanical properties
| Tensile strength Rm N/mm | ≥520 |
|---|---|
| Yield strength RP0.2 N/mm | ≥205 |
| Elongation % | ≥40 |
| Hardness HB | ≤187 |
| *After solution heat treatment | |
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Applications
- Chemical processing: reactors, distillation columns, and heat exchangers exposed to hot corrosive media
- Energy equipment: boiler piping, steam-turbine components, and high-temperature flues in thermal power plants requiring oxidation resistance
- High-temperature furnace components: furnace hardware, electric furnace tubes, and heat-treatment supports for long-term service at 1150℃
- Environmental engineering: waste-incinerator equipment and flue gas desulfurization units exposed to high-temperature corrosion
- Aerospace: high-temperature aircraft-engine components and exhaust systems requiring low weight and hot strength
- Petroleum and petrochemical processing: cracking furnace tubes and sulfur-bearing oil and gas piping requiring sulfide-corrosion resistance
- Food and pharmaceutical processing: corrosion-resistant hygienic equipment and sterile vessels used at high temperature
Available product forms
- Round Bar
- Wire
- Forgings
- Plate
- Strip
- Seamless Pipe
- Welded Pipe
- Capillary Tube
- Flanges
- Pipe Fittings
- Non-standard Custom Parts
Values follow the Milike materials catalogue and are provided for preliminary review. Confirm the applicable purchase specification, heat treatment condition, and inspection requirements before final material selection.
- Heat and batch traceability
- PMI testing available
- Cut-to-size processing
- Material certificates on request
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