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Stainless Steel Grade 430 (UNS S43000), stainless steel bar
Typical applications for 430 grade include:
Typical applications for 430F grade include:
Stainless steel grade 430 is a non-hardenable steel containing straight chromium, and belongs to the ferritic group of steels. This steel is known for its good corrosion resistance and formability, coupled with practical mechanical properties. It can be used in certain chemical applications due to its resistance to nitric acid.
Grade 430F stainless steel is usually provided in bar form to be used in automatic screw machines.
Grade 434 has similar properties as grade 430, although it is a molybdenum-bearing version. The molybdenum content enhances its corrosion resistance.
Table 1 – Chemical compositions of grade 430 stainless steels
| GradeN | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 430 |
min. max. |
- 0.12 |
- 1 |
- 1 |
- 0.04 |
- 0.030 |
16 18 |
- |
- 0.50 |
- |
| 430F |
min. max. |
- 0.12 |
- 1.25 |
- 1 |
- 0.06 |
0.15 - |
16 18 |
- | - | - |
The mechanical properties for grade 430 stainless steels are listed in the table below.
Table 2 - Mechanical properties of grade 430 stainless steels
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 430 | 483 | 310 | 22 | 85 | 183 |
| 430F | 552 typical | 379 typical | 25 typical | - | 262 |
The following table outlines the physical properties of grade 430 stainless steels.
Table 3 - Physical properties of grade 430 stainless steels in the annealed condition
| Grade | Density (kg/m3) | Elastic Modulus (GPa) | Mean Coefficient of Thermal Expansion (μm/m/°C) |
Thermal Conductivity (W/m.K) |
Specific Heat 0-100°C (J/kg.K) | Electrical Resistivity (nΩ.m) | |||
| 0-100°C | 0-315°C | 0-538°C | at 100°C | at 500°C | |||||
| 430 | 7750 | 200 | 10.4 | 11.0 | 11.4 | 26.1 | 26.3 | 460 | 600 |
| 430F | 7750 | 200 | 10.4 | 11.0 | 11.4 | 26.1 | 26.3 | 460 | 600 |
A comparison of grade specifications for 430 stainless steels is given in the following table.
Table 4 - Grade specifications for 430 stainless steels
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| BS | En | No | Name | ||||
| 430 | S43000 | 430S17 | 60 | 1.4016 | X8Cr17 | 2320 | SUS 430 |
| 430F | S43020 | - | - | 1.4104 | X12CrMoS17 | 2383 | SUS 430F |
Suitable alternative grades that can be chosen instead of grade 430 stainless steelgrades that can be chosen instead of grade 430 stainless steel are listed in the table below.