430 Stainless Steel (UNS S43000)
Ferritic · ASTM A240/A240M · Density 7.7 g/cm³
Type 430 (UNS S43000) is a 17% chromium ferritic stainless steel with no deliberate nickel addition, so its price is lower and more stable than 304. It offers good corrosion resistance in dry indoor environments and is widely used for appliance panels, kitchen counters and decorative trim.
Chemical Composition (wt%)
| C | Mn | Si | Cr | P | S |
|---|---|---|---|---|---|
| ≤0.12 | ≤1.00 | ≤1.00 | 16.0–18.0 | ≤0.040 | ≤0.030 |
Single values are maximums unless a range is shown. Balance: Fe. Per ASTM A240/A240M.
Mechanical Properties
| Tensile strength | ≥450 MPa (65 ksi) |
|---|---|
| Yield strength (0.2%) | ≥205 MPa (30 ksi) |
| Elongation (50 mm) | ≥22% |
Room-temperature minimum values are summarized for annealed flat product under ASTM A240/A240M unless a condition is named in the property label; product form and thickness can change the requirement.
Physical Properties & Structure
| Density | 7.7 g/cm³ |
|---|---|
| Magnetic response | Magnetic because the room-temperature matrix is ferritic. |
| Microstructure | Ferritic |
Corrosion Resistance & Limits
- Ferritic grades resist chloride stress-corrosion cracking better than common austenitic grades, while pitting resistance still depends on chromium, molybdenum and exposure.
- Weld condition, section thickness, crevices, deposits and surface contamination can control service performance; validate the actual fabrication and environment.
Fabrication & Heat Treatment
| Welding | Control heat input, interpass temperature and joint design to limit grain growth and loss of toughness; stabilized grades improve but do not remove these controls. |
|---|---|
| Forming | Formability is useful in sheet gauges but lower than common austenitic grades, especially in heavy sections and severe draws. |
| Machining | Machining is generally straightforward with rigid tooling; avoid smearing, overheating and iron contamination of finished surfaces. |
| Heat treatment | Ferritic grades are not hardened by heat treatment. Annealing can restore ductility, but the temperature and cooling route must follow the product specification. |
Equivalent Grades
The closest international equivalents of 430 Stainless Steel are 1.4016 (X6Cr17) in the EN system, SUS430 in the JIS system, 10Cr17 in the GB system.
These are common corresponding designations, not unconditional substitutes. Verify chemistry, mechanical properties, product standard, delivery condition, dimensions and project approval before changing designation.
| System | Designation |
|---|---|
| UNS | S43000 |
| EN | 1.4016 (X6Cr17) |
| JIS | SUS430 |
| GB | 10Cr17 |
Reference Product Forms & Dimensional Ranges
Common reference product forms for 430 stainless steel: Sheet / Plate, Coil / Strip.
| Finishes | 2B, BA, No.4, hairline |
|---|---|
| Sheet / coil thickness | 0.2–3.0 mm |
| Slit strip width | as narrow as 20 mm |
Common surface and delivery options: No.1, 2B, BA or mechanically polished finish when supported by the product route.
These published ranges are engineering references, not a live-stock or production-capability promise. Confirm the required product form, dimensions, condition, finish and supply route in the quotation.
Typical Applications
- Appliance panels and housings
- Kitchen counters and backsplashes
- Range hoods and interior trim
- Automotive trim
430 Products We Export
Frequently Asked Questions
Is 430 stainless steel magnetic?
Yes — 430 is ferritic, so it is strongly magnetic in every condition. This is why magnets stick to many appliance fronts made of 430 BA finish.
430 vs 304 — when is 430 good enough?
Indoors and in dry or occasionally damp service — appliance panels, trim, counters — 430 performs well at a lower, nickel-independent price. For outdoor exposure, frequent wet cleaning with chlorides, or welded structural parts, 304 is the better choice.
Can 430 be welded?
Yes, but with care: the heat-affected zone grain-coarsens and loses toughness. Thin gauges spot-weld and TIG-weld fine for trim work; heavy welded fabrication is better served by austenitic grades or stabilized ferritics like 439/441.
430 Compared With Other Grades
Organizational author: Tsingshan (Shandong) Iron & Steel Co., Ltd..Review method, status and limitations.
Other stainless steel grades:
304304L316316L201321310S4102205202301309S316Ti347904L409L4204394414442507303317L254 SMO440C17-4 PH2304
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