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309 Stainless Steel｜Foshan Huili Metal Technology Co., Ltd.（佛山市惠利金属科技有限公司）
Higher Cr-Ni than 304 gives outstanding high-temperature oxidation resistance and moderate creep strength, usable in cyclic heating around 900–1000℃; corrosion resistance also beats 304.
309不锈钢
AusteniticHigher Cr-Ni than 304 gives outstanding high-temperature oxidation resistance and moderate creep strength, usable in cyclic heating around 900–1000℃; corrosion resistance also beats 304.
Standards
| GB (China) | 06Cr23Ni13（旧0Cr23Ni13） |
|---|---|
| EN (Europe) | 1.4833 / X7CrNi23-14（309S为1.4833低C） |
| ASTM/UNS (USA) | 309 / UNS S30900（309S: S30908） |
| JIS (Japan) | SUS309 / SUS309S |
Chemical composition (wt%)
| Chemical composition (wt%) | % |
|---|---|
C | ≤0.20（309S≤0.08） |
Si | ≤1.00 |
Mn | ≤2.00 |
Cr | 22.0–24.0 |
Ni | 12.0–15.0 |
Density：7.98 g/cm³
Performance
Higher Cr-Ni than 304 gives outstanding high-temperature oxidation resistance and moderate creep strength, usable in cyclic heating around 900–1000℃; corrosion resistance also beats 304.
Use cases
Heat-treat furnace parts, heat exchangers, burners, high-temperature stacks, carburizing/nitriding fixtures.
Characteristics
Good high-temperature strength and oxidation resistance; 309S is the low-carbon grade, less prone to embrittlement when welded or hot.
Pitfalls & cautions
Related grades
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