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Type 309 and 309S are austenitic chromium-nickel stainless steels designed for high-temperature applications. With high chromium (~23%) and nickel (~12%) content, they offer excellent resistance to oxidation and corrosion, as well as outstanding heat resistance up to 1000°C. 309S has lower carbon content for improved weldability.
| Material Grade | ASTM A240 / UNS S30900 / S30908 | Standard | ASTM A240 / UNS S30900 / S30908 |
| Thickness Range | 0.3 - 100 mm | Width Range | 1000 - 2500 mm |
| Length Range | 2000 - 6000 mm (or cut to size) | MOQ | 1 Ton |
| Lead Time | 15-20 days | Port of Shipment | Shanghai / Tianjin / Qingdao |
| C | ≤0.20 (309) / ≤0.08 (309S) | Si | ≤1.00 |
| Mn | ≤2.00 | P | ≤0.045 |
| S | ≤0.030 | Cr | 22.0 - 24.0 |
| Ni | 12.0 - 15.0 | Fe | Remainder |
| Tensile Strength | ≥450 MPa | Yield Strength | ≥205 MPa |
| Elongation | ≥40% |
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