430 vs 430F
These two grades are listed as equivalents of each other: their chemistry windows overlap and they serve the same applications. They are not always identical — check the differences below before substituting, especially in certified designs.
430
Stainless Steel
430 is the most widely used ferritic stainless steel, a 17% chromium, nickel-free grade with good corrosion resistance in mild atmospheres and excellent resistance to nitric acid. It is the standard grade for appliance trim and decorative sheet.
Standards: DIN 1.4016 · AISI 430 · JIS SUS430 · GB 10Cr17
430F
Stainless Steel
430F is the free-machining version of 430, with sulfur added for chip breaking in high-volume screw machining. It keeps the corrosion resistance of 430 in non-welded parts but should not be welded.
Standards: DIN 1.4105 · AISI 430F · JIS SUS430F · GB Y10Cr17
Chemical composition compared (%)
| Element | 430 | 430F |
|---|---|---|
| C | ≤0.12 | ≤0.12 |
| Si | ≤1.00 | ≤1.00 |
| Mn | ≤1.00 | ≤1.25 |
| P | ≤0.040 | ≤0.060 |
| S | ≤0.030 | ≥0.15 |
| Cr | 16.00–18.00 | 16.00–18.00 |
| Ni | ≤0.75 | — |
Properties compared
| Property | 430 | 430F |
|---|---|---|
| Delivery condition | Annealed | Annealed |
| Hardness | ≤183 HB (annealed) | ≤262 HB (annealed) |
| Tensile strength | 450–600 MPa | 515–655 MPa |
| Yield strength | ≥205 MPa | — |
| Density | 7.70 g/cm³ | 7.70 g/cm³ |
| Magnetic | Yes | Yes |
Sourcing either grade?
Nasteel stocks both families from Shenzhen with EN 10204 3.1 mill certificates by heat number.
Ask for a quotationSee full data sheets: 430 · 430F. Substitution decisions for certified parts stay with the design authority.