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Stainless Steel

430 Stainless

430 is a ferritic stainless steel: magnetic, non-hardenable by heat treatment, and valued for a clean appearance at low cost. With ~17% chromium it offers slightly better corrosion resistance than 410 (rated 3.3) and tolerates oxidizing conditions to 815 degrees C. At 480 MPa tensile it is a formable sheet grade rather than a structural or wear material.

How 430 Stainless machines

Machinability is moderate at 2.8/5. Ferritic 430 cuts more predictably than austenitic stainless because it work-hardens less, but it can be gummy and produce stringy chips. Use sharp carbide tooling, positive rake, firm feeds to avoid rubbing, and good coolant to control built-up edge and surface finish.

Manufacturing & processing

430 is primarily formed via sheet metal, with CNC and forging also listed. It cannot be strengthened by heat treatment; properties come from cold work and annealing. It welds with care but is prone to grain coarsening and reduced toughness in the weld zone, so it is most often used in fabricated, non-structural assemblies.

Typical applications

Best for low-cost decorative trim and appliances. Typical uses include appliance panels, kitchen equipment, automotive trim, dishwasher and oven liners, and indoor architectural accents where a bright stainless look and basic corrosion resistance are needed at minimum cost.

When to choose it

Choose 430 for decorative, indoor, or appliance sheet parts where cost matters and loads are light. If the part must be hardened, use 410. If it faces chlorides, food acids, or outdoor exposure, step up to austenitic 304 for far better corrosion performance.

Suitable surface finishes

Common finishes for 430 Stainless: passivation, electropolishing, bead blasting, brushed. Use the finish selector →

FAQ

Can 430 stainless be hardened by heat treatment?
No. As a ferritic grade, 430 does not transform to martensite and cannot be hardened by quenching. Its strength comes only from cold working and annealing. If you require a stainless that can be hardened for wear or edge retention, choose martensitic 410 instead.
Is 430 more corrosion resistant than 410?
Slightly, rated 3.3 versus 3.0, thanks to its higher chromium content. Neither matches austenitic 304 or 316. 430 suits dry indoor and appliance use, but it is not recommended for marine, outdoor, or chloride-rich environments where it would pit.
Why choose 430 over 304?
Cost and magnetism. 430 is cheaper and magnetic, making it attractive for high-volume decorative and appliance parts where loads are light. 304 offers much better corrosion resistance and formability, so pick it whenever durability or environment outweighs the price savings.

Property values are typical/nominal for early guidance and vary by temper, grade, supplier and heat treatment. Confirm critical specs against a certified datasheet or with an mfgiq engineer.