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904L Stainless Steel｜Foshan Huili Metal Technology Co., Ltd.（佛山市惠利金属科技有限公司）
A high-nickel, high-molybdenum, copper-containing super-austenitic with strong resistance to reducing acids like dilute sulfuric and phosphoric acid and to chloride pitting; corrosion resistance approaches duplex and some nickel alloys, but strength is low.
904L不锈钢
AusteniticA high-nickel, high-molybdenum, copper-containing super-austenitic with strong resistance to reducing acids like dilute sulfuric and phosphoric acid and to chloride pitting; corrosion resistance approaches duplex and some nickel alloys, but strength is low.
Standards
| GB (China) | 015Cr21Ni26Mo5Cu2（旧00Cr20Ni25Mo4.5Cu） |
|---|---|
| EN (Europe) | 1.4539 / X1NiCrMoCu25-20-5 |
| ASTM/UNS (USA) | 904L / UNS N08904 |
| JIS (Japan) | SUS890L |
Chemical composition (wt%)
| Chemical composition (wt%) | % |
|---|---|
C | ≤0.020 |
Si | ≤1.00 |
Mn | ≤2.00 |
Cr | 19.0–23.0 |
Ni | 23.0–28.0 |
Mo | 4.0–5.0 |
Cu | 1.0–2.0 |
Density：7.95 g/cm³
Performance
A high-nickel, high-molybdenum, copper-containing super-austenitic with strong resistance to reducing acids like dilute sulfuric and phosphoric acid and to chloride pitting; corrosion resistance approaches duplex and some nickel alloys, but strength is low.
Use cases
Sulfuric/phosphoric acid plant, FGD, desalination, pulp bleaching, mixed-acid chemical environments.
Characteristics
Good weldability without post-weld heat treatment; the high alloy gives excellent general corrosion resistance, but at high cost and low strength.
Pitfalls & cautions
Related grades
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