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439 Stainless Steel｜Foshan Huili Metal Technology Co., Ltd.（佛山市惠利金属科技有限公司）
A titanium-stabilized 18%Cr ferritic with better post-weld intergranular resistance and formability than 430; often the first-choice ferritic for heavily welded structures, with good general atmospheric resistance.
439不锈钢
FerriticA titanium-stabilized 18%Cr ferritic with better post-weld intergranular resistance and formability than 430; often the first-choice ferritic for heavily welded structures, with good general atmospheric resistance.
Standards
| GB (China) | ≈019Cr19Mo2Ti（近似） |
|---|---|
| EN (Europe) | 1.4510 / X3CrTi17 |
| ASTM/UNS (USA) | 439 / UNS S43035 |
| JIS (Japan) | SUS439 |
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 | ≤0.07 |
Si | ≤1.00 |
Mn | ≤1.00 |
Cr | 17.0–19.0 |
Ti | ≥0.20（稳定化） |
Density：7.70 g/cm³
Performance
A titanium-stabilized 18%Cr ferritic with better post-weld intergranular resistance and formability than 430; often the first-choice ferritic for heavily welded structures, with good general atmospheric resistance.
Use cases
Auto exhaust, water-heater liners, building roofing and curtain walls, welded kitchen/bath parts.
Characteristics
No sensitization after welding and good formability; cheaper than austenite, suitable to replace some welded 304 decorative parts.
Pitfalls & cautions
Related grades
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