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430 stainless steel (also written as AISI 430, Type 430, UNS S43000, SUS 430, or EN 1.4016 / X6Cr17) is one of the most widely used and cost-effective grades of stainless steel in the world.
It belongs to the 400 series and is classified as a straight-chromium ferritic stainless steel — meaning its primary alloying element is chromium (16–18%) and it contains very little or no nickel.
430 stainless steel is a low-cost, magnetic, ferritic stainless steel with good corrosion resistance in mild environments, excellent thermal conductivity, and high formability, but limited pitting resistance in chlorides.
|
Property / Feature |
Description / Value |
Why It Matters |
|---|---|---|
|
Family |
Ferritic (body-centered cubic structure) |
Magnetic, good heat transfer, low expansion |
|
Main alloy |
Chromium 16.00–18.00% |
Forms protective passive oxide layer |
|
Nickel content |
≤ 0.75% (usually < 0.50% or trace) |
No nickel = stable & lower price |
|
Density |
7.70 g/cm³ |
Lighter than 304 (8.00 g/cm³) |
|
Thermal conductivity |
≈ 26 W/m·K |
~60% higher than 304 — heats/cools faster |
|
Thermal expansion |
10.5 × 10⁻⁶/°C |
~35% lower than 304 — less warping |
|
Magnetic |
Yes — strongly magnetic in all conditions |
Easy handling, magnetic knife holders |
|
Corrosion resistance |
Good in mild atmospheres, fresh water, nitric acid |
Pits in chlorides/salt water |
|
Maximum service temperature |
815 °C intermittent / 760 °C continuous |
Good oxidation resistance |
|
Cost |
30–50% lower than 304 |
Price stability, high-volume use |
|
Standard |
Designation |
|---|---|
|
AISI / UNS |
430 / S43000 |
|
JIS |
SUS430 |
|
EN / DIN |
1.4016 / X6Cr17 |
|
GB/T |
10Cr17 or 1Cr17 |
|
BS |
430S17 |
|
ISO |
X6Cr17 |
All of these refer to essentially the same alloy.
|
Property |
Minimum (standard) |
Typical |
|---|---|---|
|
Yield Strength (0.2% offset) |
≥ 205 MPa |
220–280 MPa |
|
Tensile Strength |
≥ 450 MPa |
450–600 MPa |
|
Elongation (50 mm) |
≥ 22% |
25–35% |
|
Hardness (Rockwell B) |
≤ 89 HRB |
80–88 HRB |
430 stainless steel is one of the highest-volume grades globally because it performs well in mild conditions at low cost. Typical applications include:
For detailed product pages from Gangsteel, please see our:
When someone says “430 stainless steel,” they usually mean:
Bottom line: 430 is good quality and very widely used — not the highest corrosion resistance, but excellent value, thermal performance, and formability for most everyday uses.
If you need current pricing, samples, or a comparison with 304/201/316 for your specific application, just let me know — we’ll give you a clear, honest recommendation within minutes.
Gangsteel is your reliable source for genuine, high-quality 430 stainless steel.
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