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444 Stainless Steel｜Foshan Huili Metal Technology Co., Ltd.（佛山市惠利金属科技有限公司）
19%Cr, ~2%Mo, Nb/Ti-stabilized ferritic whose chloride pitting resistance approaches 316L and far exceeds 430, nickel-free and cheaper — a classic preferred choice for long-term water tanks and water-bearing parts.
444不锈钢
Ferritic19%Cr, ~2%Mo, Nb/Ti-stabilized ferritic whose chloride pitting resistance approaches 316L and far exceeds 430, nickel-free and cheaper — a classic preferred choice for long-term water tanks and water-bearing parts.
Standards
| GB (China) | 019Cr19Mo2NbTi（旧00Cr18Mo2） |
|---|---|
| EN (Europe) | ≈1.4521 / 1.4509系（近似） |
| ASTM/UNS (USA) | 444 / UNS S44400 |
| JIS (Japan) | SUS444 |
For a few high-chromium ferritic and specialty hardened grades the EN/JIS equivalents differ between mills; marked with ≈ — rely on the mill certificate composition when ordering.
Chemical composition (wt%)
| Chemical composition (wt%) | % |
|---|---|
C | ≤0.025 |
Si | ≤1.00 |
Mn | ≤1.00 |
Cr | 17.5–19.5 |
Mo | 1.75–2.50 |
Nb+Ti | 适量 |
Density：7.75 g/cm³
Performance
19%Cr, ~2%Mo, Nb/Ti-stabilized ferritic whose chloride pitting resistance approaches 316L and far exceeds 430, nickel-free and cheaper — a classic preferred choice for long-term water tanks and water-bearing parts.
Use cases
Potable/reclaimed water tanks, water-heater liners, solar, coastal building roofing, chloride mild-corrosion service.
Characteristics
High molybdenum gives strong pitting and crevice resistance with post-weld stability; low density and good conductivity.
Pitfalls & cautions
Related grades
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