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420 Stainless Steel｜Foshan Huili Metal Technology Co., Ltd.（佛山市惠利金属科技有限公司）
A martensitic with higher carbon than 410; after quenching it reaches higher hardness with good wear and cutting performance, but corrosion resistance stays limited — a 'hard-yet-rusts' tool grade.
420不锈钢
MartensiticA martensitic with higher carbon than 410; after quenching it reaches higher hardness with good wear and cutting performance, but corrosion resistance stays limited — a 'hard-yet-rusts' tool grade.
Standards
| GB (China) | 20Cr13（旧2Cr13） |
|---|---|
| EN (Europe) | 1.4021 / X20Cr13 |
| ASTM/UNS (USA) | 420 / UNS S42000 |
| JIS (Japan) | SUS420J1 |
Chemical composition (wt%)
| Chemical composition (wt%) | % |
|---|---|
C | 0.15–0.36 |
Si | ≤1.00 |
Mn | ≤1.00 |
Cr | 12.0–14.0 |
Density：7.70 g/cm³
Performance
A martensitic with higher carbon than 410; after quenching it reaches higher hardness with good wear and cutting performance, but corrosion resistance stays limited — a 'hard-yet-rusts' tool grade.
Use cases
Knives, scissors, surgical instruments, gauges, nozzles, plastic molds and other parts demanding hardness and wear resistance.
Characteristics
Heat-treatable to fairly high hardness (around HRC 50+), good polish and machinability, strongly magnetic.
Pitfalls & cautions
Related grades
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