410 Stainless vs 430 Stainless
410 and 430 are both straight-chromium stainless grades with no nickel, but they differ fundamentally in phase: 410 is martensitic and hardenable by heat treatment, while 430 is ferritic and cannot be hardened. Engineers weigh them when a low-cost, nickel-free stainless is needed and the deciding factor is whether the part must be hardened for strength and wear, or simply formed for decorative service.
The verdict
Choose 410 when the part must be hardened for strength or wear — cutlery, valve parts and shafts — since its martensitic structure heat-treats to high hardness (310 MPa yield as-supplied, much higher when hardened). Choose 430 for low-cost decorative or appliance trim where formability and corrosion resistance matter more than hardness; it is ferritic, cheaper and slightly more corrosion-resistant but cannot be hardened.
Side-by-side data
| Property | 410 Stainless | 430 Stainless |
|---|---|---|
| Category | Stainless Steel | Stainless Steel |
| Density (g/cm³) | 7.7 | 7.7 |
| Tensile strength (MPa) | 515 | 480 |
| Yield strength (MPa) | 310 | 275 |
| Elongation (%) | 20 | 22 |
| Hardness | 95 HRB | 85 HRB |
| Max service temp (°C) | 650 | 815 |
| Machinability | ●●●●● | ●●●●● |
| Corrosion resistance | ●●●●● | ●●●●● |
| Relative cost | ●●●●● | ●●●●● |
| Thermal cond. (W/m·K) | 25 | 26 |
| Typically used for | Hardenable cutlery & valve parts | Low-cost decorative trim & appliances |
Which should you choose?
Choose 410 Stainless when…
- The part must be heat-treated to high hardness and strength (cutlery, blades, valve seats)
- Wear resistance and edge retention matter
- Higher as-supplied strength is useful (310 MPa yield vs 430's 275 MPa)
- The component is a hardenable shaft, fastener or pump/valve part
- Moderate corrosion resistance in the hardened condition is acceptable
- Service runs hot — 410 is hardenable and used for some elevated-temperature parts
Choose 430 Stainless when…
- The application is decorative trim, appliance panels or indoor hardware
- Lowest cost is the priority among nickel-free stainless grades
- Good formability for sheet-metal bending and rolling is needed
- Slightly better corrosion resistance than 410 is wanted in mild service
- Hardening is not required — the part stays soft ferritic
- Good oxidation resistance at elevated temperature (~815°C) matters
Key differences that matter
- 410 is martensitic and hardenable by heat treatment; 430 is ferritic and not hardenable
- Both are straight-chromium, nickel-free, magnetic stainless grades — lower cost than austenitics
- 430 has slightly higher corrosion resistance in this data; both are modest, mild-service grades
- 410 has higher as-supplied yield (310 vs 275 MPa) and develops much higher strength when hardened
- 430 is more formable for sheet work; 410's hardenability suits machined/hardened parts
- 430 is cheaper (lower relative cost); both are inexpensive nickel-free options
- 410 tolerates somewhat lower max temperature in this data (~650°C vs 430's ~815°C)
Need 410 Stainless or 430 Stainless parts made?
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Open the Material SelectorGet a Quote →Frequently asked questions
Can 410 be hardened but 430 cannot?
Correct, and it is the defining difference. 410 is martensitic, so quench-and-temper heat treatment raises it to high hardness for cutlery, blades and wear parts. 430 is ferritic and cannot be hardened by heat treatment — it stays relatively soft and is used for formed, decorative sheet parts rather than load-bearing hardened components.
Which is more corrosion resistant, 410 or 430?
430 holds a slight edge in this data, largely because its higher chromium and ferritic structure resist staining a bit better than martensitic 410. Both are modest, straight-chromium grades suited to mild or indoor service; for chloride or marine exposure neither is appropriate and an austenitic grade is required.
Are both 410 and 430 magnetic?
Yes. Both are nickel-free straight-chromium stainless steels — 410 martensitic, 430 ferritic — and both are ferromagnetic, so they stick to a magnet. If you need a magnetic stainless, either works; the choice between them comes down to whether the part must be hardened.
Is 430 cheaper than 410?
Yes, modestly. Both avoid expensive nickel, but 430 carries a lower relative cost and is the economical choice for decorative trim and appliance panels. 410 costs a little more and is specified when hardenability is needed, so the price difference tracks the difference in capability.
Which one forms better for sheet metal?
430. As a soft ferritic grade it bends and rolls well for trim and panels. 410 is martensitic and, especially after any hardening, is less forgiving in forming. For flat or lightly-formed sheet work choose 430; reserve 410 for machined parts that will be hardened.
Property values are typical/nominal figures for early-stage guidance only and vary by temper, grade, supplier and heat treatment. Confirm critical specifications against a certified datasheet or with an mfgiq engineer before production.