SS430 is a ferritic stainless steel with about 16–18% chromium and almost no nickel. It looks bright and resists mild indoor corrosion well, costs less than SS304, and is magnetic. It is widely used for kitchen appliances, sinks, utensils, panels and decorative trim, but not for welded parts in wet or salty service.
Quick facts
- Type
- Ferritic stainless steel
- Chromium
- About 16–18%
- Nickel
- Up to about 0.75%
- Magnetic
- Yes
- Hardening
- Not hardenable by heat treatment
- Weldability
- Fair; welds can be brittle in thick sections
Equivalent grades
| Standard | Grade |
|---|---|
| AISI / ASTM | 430 |
| EN | 1.4016 (X6Cr17) |
| UNS | S43000 |
| JIS | SUS430 |
Equivalents are close, not identical. Name the grade and standard on the drawing.
Typical chemical composition
| Element | % |
|---|---|
| Carbon (C) | 0.12 max |
| Chromium (Cr) | About 16–18 |
| Manganese (Mn) | Up to 1 |
| Silicon (Si) | Up to 1 |
| Nickel (Ni) | Up to 0.75 |
Values are typical. The exact limits depend on the standard and supplier; ask for the mill test certificate when it matters.
SS430 or SS304?
| SS430 | SS304 | |
|---|---|---|
| Cost | Lower | Higher |
| Corrosion resistance | Good indoors, fair outdoors | Good, including outdoors |
| Magnetic | Yes | No |
| Deep drawing | Limited | Excellent |
| Welding | Fair | Excellent |
Typical uses
- Kitchen appliance panels and cabinets
- Sinks, utensils and cutlery
- Decorative trim and lift panels
- Washing machine drums
- Burner and oven parts
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Questions
- How do I tell SS430 from SS304?
- A magnet sticks firmly to SS430 and only weakly or not at all to annealed SS304. A chemical spot test or analyser confirms it.
- Can SS430 be used outdoors?
- It can, but it may show tea staining or light rust in rain and coastal air. SS304 or SS316 is safer outdoors.
- Is SS430 good for welding?
- It welds, but thick welds can become brittle. It is best for thin sheet work, often joined by spot welding or fasteners.
The figures on this page are typical values for guidance, written by Diemeco from standard engineering practice. They are not a specification: confirm grades and properties with the relevant standard or the supplier's mill test certificate, and tolerances with your workshop. Last checked 22 October 2026.