JFE430CuN
High corrosion resistance, high-formabality and weldability ferritic stainless steel
<Composition> 19Cr - 0.5Cu - Nb - ultra-low (C,N) (SUS430J1L)
comparison of corrosion resistance
Weldability
Corrosion resistance
- Enhanced corrosion resistance, thanks to 3% more Cr than SUS430 and the addition of 0.5% Cu.
- Reducing the C and N content and stabilizing C and N by adding Nb significantly improves both formability and weldability.
Applications
- Automobile moldings
- Kitchen equipment, household appliances, architectural parts/materials
- Interior and exterior materials, etc. such as showcase items
Chemical composition
Chemical composition (weight %)
| Composition | C | Si | Mn | P | S | Cr | Ni | Cu | Nb | N |
|---|---|---|---|---|---|---|---|---|---|---|
| Std. | ≦ 0.025 | ≦ 1.00 | ≦ 1.00 | ≦ 0.040 | ≦ 0.03 | 16.00 - 20.00 | ≦ 0.60 | 0.30 - 0.80 | 0.20 - 0.80 | ≦ 0.025 |
| Typical values | 0.015 | 0.38 | 0.17 | 0.025 | 0.005 | 18.9 | 0.33 | 0.55 | 0.37 | 0.012 |
Mechanical properties
Mechanical properties (0.4 mmt, BA finish)
Higher r value than SUS304 for superior deep drawability, as well as lower work-hardening.
| Tensile direction | 0.2%Yield strength （kgf/mm²） |
Tensile strength （kgf/mm²） |
Elongation (%) | Hardness (Hv) | |
|---|---|---|---|---|---|
| Actual value | L | 37 | 50 | 31 | 157 |
| D | 38 | 51 | 29 | ||
| C | 37 | 50 | 30 | ||
| Average value | 37 | 50 | 30 | ||
| Std. | L | ≥ 25 | ≥ 40 | ≥ 22 | ≥ 200 |
Corrosion resistance
| Steel grade | CASS2) test |
Salt water spray3) test |
SO24) test |
Pitting potential5) (mVSCE) |
|---|---|---|---|---|
| JFE430CuN | 9.6 | 10 - 9.8 | 9.4 | 222 |
| SUS430 | 9.4 | 9.8 | 8.2 | 122 |
| SUS434 | 9.5 | 10 - 9.8 | 9.4 | 153 |
| SUS304 | 9.8 | 10 - 9.8 | 10 | 336 |
- 1) Test piece 0.4 mmt, BA finish
- 2) JIS D 0201 (49℃, (16 hr spraying＋8 hr pause) × 3 cycles)
- 3) JIS Z 2371 (5％ NaCl, 35℃, 500 hr)
- 4) DIN 50018 SFW 2.0S (40℃, 8 hr)
- 2), 3), 4) Corrosion resistance is assessed according to a rating scale
- Corrosion resistance:
ExcellentPoor - 101
- 5) Test piece #600 polished, JIS G 0577 (3.5％NaCl, 30℃)