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430 Stainless Steel (UNS S43000) is a non-hardenable, ferritic stainless steel containing straight chromium. It is highly regarded for its moderate corrosion resistance and formability, along with its magnetic properties. Ideal for decorative trim, appliances, and general-purpose applications, 430 steel is cost-effective and provides strong resistance to oxidation and certain acids.
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| Element | Content (%) |
|---|---|
| Carbon (C) | ≤ 0.12 |
| Chromium (Cr) | 16.0 – 18.0 |
| Manganese (Mn) | ≤ 1.00 |
| Silicon (Si) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.75 g/cm³ | 0.280 lb/in³ |
| Modulus of Elasticity | 200 GPa | 29.0 x 10⁶ psi |
| Thermal Expansion | 10.4 µm/m°C | 5.8 x 10⁻⁶ in/in°F |
| Thermal Conductivity | 23.9 W/m·K | 13.8 BTU/ft·hr·°F |
| Specific Heat Capacity | 460 J/kg·K | 0.11 BTU/lb·°F |
| Electrical Resistivity | 600 nΩ·m | 23.6 µΩ·in |
| Condition | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (Brinell) | Hardness (Rockwell B) |
|---|---|---|---|---|---|
| Annealed | 450 – 600 | 260 – 310 | 20 – 22 | 85 – 183 | 89 |
| Property | Metric | Imperial |
|---|---|---|
| Electrical Resistivity | 600 nΩ·m | 23.6 µΩ·in |
| Property | Metric | Imperial |
|---|---|---|
| Thermal Conductivity | 23.9 W/m·K | 13.8 BTU/ft·hr·°F |
| Specific Heat Capacity | 460 J/kg·K | 0.11 BTU/lb·°F |
| Melting Range | 1425 – 1510°C | 2597 – 2750°F |
| Product Type | Standards | Sizes | Types | Applications |
|---|---|---|---|---|
| Sheets & Plates | ASTM A240 | Thickness: 1.5mm – 50mm | Hot Rolled, Cold Rolled | Appliances, kitchenware, paneling |
| Pipes & Tubes | ASTM A268, A249 | Diameter: 6mm – 1200mm | Seamless, Welded | Architectural, chemical, and kitchen fittings |
| Bars | ASTM A276 | Diameter: up to 100mm | Round, Square, Hex | Bolts, screws, fasteners |
| Angles, Channels, Beams | ASTM A484 | Custom sizes available | L-Angles, U-Channels, I-Beams | Structural applications, decorative trim |
| Fittings | ASTM A403 | Size: 1/2″ – 72″ | Buttweld, Socket Weld | Low-cost kitchen fittings, flue linings |
Widely used in applications where cost-effectiveness and moderate corrosion resistance are priorities, 430 Stainless Steel is ideal for:
Although 430 Stainless Steel offers significant cost advantages, 304 Stainless Steel provides greater corrosion resistance due to its nickel content. While 304 can be easily welded and formed, 430 is best suited for non-welded or minimally welded applications in drier environments.
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