310s Stainless Steel Sheel
310S stainless steel sheet offers the best combination of heat resistance and weldability among the 309–310 family.
Compared with 309 and 310, 310S has lower carbon content, making it the preferred grade for high-temperature welded structures.
- Description
310S stainless steel sheet is a low-carbon, high-chromium, high-nickel austenitic stainless steel designed for high-temperature and oxidation-resistant applications.
It offers excellent resistance to scaling, carburization, and thermal fatigue, making it ideal for continuous service up to 1050°C.
The “S” in 310S indicates low carbon, which improves weldability and reduces the risk of intergranular corrosion.
Chemical Composition Comparison (Typical %)
| Element | 309 | 310 | 310S |
|---|---|---|---|
| Carbon (C) | ≤ 0.20 | ≤ 0.25 | ≤ 0.08 |
| Chromium (Cr) | 22.0 – 24.0 | 24.0 – 26.0 | 24.0 – 26.0 |
| Nickel (Ni) | 12.0 – 15.0 | 19.0 – 22.0 | 19.0 – 22.0 |
| Silicon (Si) | ≤ 1.5 | ≤ 1.5 | ≤ 1.5 |
| Manganese (Mn) | ≤ 2.0 | ≤ 2.0 | ≤ 2.0 |
| Iron (Fe) | Balance | Balance | Balance |
Performance Comparison
| Property | 309 | 310 | 310S |
|---|---|---|---|
| Max Service Temperature | ~1000°C | ~1100°C | ~1050°C |
| Oxidation Resistance | Very good | Excellent | Excellent |
| Weldability | Fair | Fair | Excellent |
| Thermal Shock Resistance | Good | Very good | Very good |
| Carburization Resistance | Moderate | Excellent | Excellent |
| Intergranular Corrosion Risk | Higher | Higher | Low |
Key Differences Explained
| Feature | 309 | 310 | 310S |
|---|---|---|---|
| Carbon level | Higher | Highest | Low carbon |
| Heat resistance | High | Very high | Very high |
| Weldability | Lower | Lower | Best |
| Preferred for welded furnaces | Not ideal | Not ideal | Best choice |
Typical Applications
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Furnace linings and heat shields
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Heat exchangers and radiant tubes
-
Kiln parts and combustion chambers
-
Petrochemical processing equipment
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High-temperature conveyors and trays
