430F
Data verified430F 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.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.12 |
| Si | ≤1.00 |
| Mn | ≤1.25 |
| P | ≤0.060 |
| S | ≥0.15 |
| Cr | 16.00–18.00 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Delivery condition | Annealed |
| Hardness | ≤262 HB (annealed) |
| Tensile strength | 515–655 MPa |
| Density | 7.70 g/cm³ |
| Magnetic | Yes |
Heat treatment
Anneal 790–845 °C. Not hardenable by heat treatment.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.4105 |
| aisi | 430F |
| jis | SUS430F |
| gb | Y10Cr17 |
Compare side by side: 430F vs 430
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Solenoid and valve parts, fasteners, fittings, gears, automatic-lathe components.
Processing: Best machinability of the ferritic family; sulfur makes welding impractical and lowers transverse toughness.
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Ask for a quotationVisit NasteelSource: ASTM A276 / EN 10088 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.