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It is often used in high temperature environment. Its high chromium content and nickel content ensure good corrosion resistance and oxidation resistance, and its strength at room temperature is a little higher than that of austenite 304 alloy
Applications
High alloy stainless steel usually exhibits good high temperature strength, creep resistance and environmental corrosion resistance. Therefore, they are widely used in furnace parts of heat treatment industry, such as conveyor belts, drums, furnace heads, refractory pads, hangers and so on. These grades are also used in chemical processing industries to carry hot concentrated acids, ammonia water and disulfides. In the food processing industry, these grades are used in contact with thermoacetic acid and citric acid.
Chemical Composition and Mechanical Property
| Grade | C(%) | Si(%) | Mn(%) | P(%) | S(%) | Cr(%) | Ni(%) | N(%) | Cu(%) |
| 309S | ≤0.08 | ≤1.0 | ≤2.0 | ≤0.045 | ≤0.03 | 22.0-24.0 | 12.0-15.0 | --- | --- |
| Grade | Tensile strengthMpa | Yield StrengthMpa | Elongation(%) | rate of reduction in area(%) | Density(g/cm3) |
| 309S | ≥515 | ≥205 | ≥40 | ≥50 | 7.98 |
Available for 309S grade
| Type | Thickness | Width | Finish | Standard | Origin |
| Cold rolled(2B) | 0.8mm-3.0mm | 1000mm 1219mm 1500mm | 2B / No.4 / HL / BA / Mirror etc | GB/ASTM/JIS/DIN/KS etc | TISCO / ZPSS etc |
| Hot rolled(No.1) | 3.0mm-80.0mm | 1219mm 1500mm 2000mm | No.1/No.4/HL/Mirror etc | GB/ASTM/JIS/DIN/KS etc | TISCO / ZPSS etc |
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