Ferritic · UNS S43000
430 Stainless Steel
430 is a ferritic stainless — chromium-bearing but nickel-free, so it is magnetic and noticeably cheaper than the austenitic 300 series. It resists atmospheric and mild chemical attack well and does not work-harden like 304, which makes it easy to form and draw, at the cost of lower corrosion resistance and no weld ductility.
Quote within 24 working hours · Certificate type stated on the quote
Ferritic · UNS S43000 · 7.70 g/cm³
At a glance
430 Stainless — The Short Version
| Alloy family | Ferritic (UNS S43000) |
|---|---|
| Density | 7.70 g/cm³ |
| Standards | ASTM A240 · EN 10088-2 · JIS G4305 |
| Forms supplied | Stainless Steel Coil · Stainless Steel Sheet & Plate · Stainless Steel Profile |
Chemistry
430 Chemical Composition Limits
Percent by weight. These are the registered limits, not a typical analysis — a heat that sits anywhere inside them is still 430.
| Element | Limit (% wt) | Element | Limit (% wt) |
|---|---|---|---|
| C | 0.12 max | Mn | 1.00 max |
| P | 0.040 max | S | 0.030 max |
| Si | 1.00 max | Cr | 16.0 – 18.0 |
| Ni | 0.75 max | Mo | — |
| N | — |
Composition limits are the ASTM A240 registered ranges, which EN 10088-2 refers back to. Mechanical values are typical for the solution-annealed condition, not acceptance minima — the minima are set by the product standard, and the mill certificate reports the measured values for your heat.
Mechanicals
Typical Mechanical Properties (Solution Annealed)
Room temperature. Use these to compare grades — the acceptance figures for your order come from the product standard and are reported on the mill certificate for the actual heat.
| Condition | Tensile (MPa) | Yield (MPa) | Elongation (%) |
|---|---|---|---|
| Annealed | 450 | 205 | 22 |
Cold-worked tempers are available to order — values are quoted with the offer rather than assumed from this table.
Forms
430 in the Forms We Supply
The same grade behaves differently as coil, plate and tube because the forming route sets the surface and the final mechanical condition. Pick the form first.
430 Stainless Steel Coil
Cold-rolled and hot-rolled coil in 200 / 300 / 400 series.
0.3 – 8.0 mm · 600 – 2,000 mm
430 Stainless Steel Sheet & Plate
Cold-rolled sheet and hot-rolled plate for structural and decorative use.
0.3 – 120 mm · 1,000 – 2,000 mm
430 Stainless Steel Profile
Angle, channel, I-beam and special sections.
Section 20 – 200 mm · —
Selection
Choose 430 When — and When Not To
Choose 430 when
Appliance trim, kitchenware, automotive trim and architectural cladding where the part is magnetic or where cost matters and the environment is mild. It forms and draws well because it does not work-harden the way 304 does.
Think again if
Welded, load-bearing or chloride-exposed service. Ferritic stainless has limited weld ductility and lower corrosion resistance than 304, so keep it to indoor and atmospheric duty.
Before you ask
430 — Questions Buyers Ask
Is 430 magnetic?
Yes — 430 is ferritic, so it is strongly magnetic. That is often the whole reason it is chosen, for induction cooktops and magnetic fixtures.
Is 430 cheaper than 304?
Yes, because it contains no nickel. The saving is real, and it is the usual reason to pick 430 over 304 for mild-duty parts.
Can 430 be welded?
Only with care — ferritic grades lose ductility and toughness at the weld. For welded work, an austenitic grade like 304 is the safer call.
Does 430 rust?
It resists atmospheric corrosion well but stains sooner than 304 in wet or salty conditions. Use it indoors or in mild outdoor exposure.
Also compare
Other Stainless Grades
- 304 Stainless SteelAustenitic · UNS S30400
- 316L Stainless SteelAustenitic · UNS S31603
- 2205 Stainless SteelDuplex · UNS S32205
- 304L Stainless SteelAustenitic · UNS S30403
- 316 Stainless SteelAustenitic · UNS S31600
- 201 Stainless SteelAustenitic · UNS S20100
- 321 Stainless SteelAustenitic · UNS S32100
- 310S Stainless SteelAustenitic · UNS S31008
- All stainless grades →The full stainless grade map
Quote on 430 Stainless Steel
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