SUS430 Ferritic Stainless Steel Plate/Coil
SUS430 Ferritic Stainless Steel Plate/Coil: Properties, Equivalents & Applications
Comprehensive material data for SUS430 ferritic stainless steel plate and coil, including chemical composition, mechanical and physical properties, international equivalents, and typical applications.
Hot rolling, cold rolling, annealing, pickling, skin pass, polishing
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SUS430 Ferritic Stainless Steel Plate/Coil Introduction
SUS430 is a ferritic stainless steel standardized in JIS G4304/G4305. It contains 16–18% chromium and low carbon, offering good corrosion resistance and formability, but cannot be hardened by heat treatment. It is magnetic and widely used for interior architectural panels, kitchen equipment, and automotive trim due to its combination of moderate strength, cost-effectiveness, and resistance to mild environments.
SUS430 Ferritic Stainless Steel Plate/Coil Chemical Composition
Chemical composition according to JIS G 4304 for SUS430. Values represent ladle analysis limits. Elements not listed are not intentionally added but may be present as residuals within generally accepted limits.
| Element | Standard Value (%) | Remarks |
|---|---|---|
| Carbon (C) | ≤ 0.12 | Max |
| Silicon (Si) | ≤ 0.75 | Max |
| Manganese (Mn) | ≤ 1.00 | Max |
| Phosphorus (P) | ≤ 0.040 | Max |
| Sulfur (S) | ≤ 0.030 | Max |
| Chromium (Cr) | 16.00 – 18.00 | |
| Nickel (Ni) | ≤ 0.60 (usually ≤ 0.60*) | Max; may be residual |
| Iron (Fe) | Balance |
SUS430 Ferritic Stainless Steel Plate/Coil Thermal and Electrical Physical Properties
Physical properties of SUS430 at room temperature and elevated temperatures in the annealed condition. Values are typical and may vary slightly depending on exact composition and processing.
| Property | Standard Required Value | Unit | Test Condition |
|---|---|---|---|
| Density (ρ) | 7.70 | g/cm³ | 20 °C |
| Elastic Modulus (E) | 200 | GPa | 20 °C |
| Shear Modulus (G) | 77 | GPa | 20 °C |
| Poisson's Ratio (ν) | 0.27 | – | 20 °C |
| Thermal Expansion (α) | 10.4 | 10⁻⁶/K | 20 – 100 °C |
| Thermal Expansion (α) | 10.8 | 10⁻⁶/K | 20 – 300 °C |
| Thermal Expansion (α) | 11.3 | 10⁻⁶/K | 20 – 500 °C |
| Thermal Conductivity (λ) | 26.1 | W/m·K | 100 °C |
| Thermal Conductivity (λ) | 26.0 | W/m·K | 500 °C |
| Specific Heat Capacity (c) | 460 | J/kg·K | 0 – 100 °C |
| Electrical Resistivity (ρ_e) | 0.60 | µΩ·m | 20 °C |
SUS430 Ferritic Stainless Steel Plate/Coil Mechanical Properties
Minimum mechanical properties for annealed SUS430 plate/coil according to JIS G 4304 (hot-rolled) and JIS G 4305 (cold-rolled). Properties are guaranteed at room temperature. Elongation values depend on thickness range.
| Property | Standard Required Value | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (ReH) | ≥ 205 | MPa | Room temperature, annealed |
| Tensile Strength (Rm) | ≥ 450 | MPa | Room temperature, annealed |
| Elongation (A) | ≥ 22 | % | Thickness ≤ 8 mm (hot-rolled) |
| Elongation (A) | ≥ 20 | % | Thickness ≤ 0.8 mm (cold-rolled) |
| Elongation (A) | ≥ 20 | % | Thickness 0.8 mm < t ≤ 3.0 mm (cold-rolled) |
| Elongation (A) | ≥ 22 | % | Thickness 3.0 mm < t ≤ 13.0 mm (cold-rolled) |
| Hardness (HB) | ≤ 183 | HBW | Annealed condition |
| Hardness (HRB) | ≤ 88 | HRB | Annealed condition |
| Hardness (HV) | ≤ 200 | HV | Annealed condition |
SUS430 Ferritic Stainless Steel Plate/Coil Completely Equivalent Material Standards & Substitutable Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| USA | ASTM A240/A240M | 430 (UNS S43000) | Chemical and mechanical equivalent to SUS430 |
| EU | EN 10088-2/EN 10088-3 | 1.4016 (X6Cr17) | Same Cr range; minor differences in Ni max |
| China | GB/T 3280, GB/T 4237 | 10Cr17 (old: 1Cr17) | Direct equivalent to SUS430 |
| International | ISO 4954 | X6Cr17 | |
| Japan | JIS G 4304/G4305 | SUS430 | Original standard |
SUS430 Ferritic Stainless Steel Plate/Coil Application Introduction
SUS430 is extensively used in mildly corrosive environments where cost and magnetic properties are important. It is not recommended for highly acidic or chloride-rich conditions. Typical fabrication methods include blanking, bending, deep drawing, and welding with preheating and post-weld annealing.
Product Applications: Kitchen sinks and countertops, Washing machine drums and dishwasher interiors, Exhaust system components (if temperature < 800°C), Decorative trims and panels, Heat exchanger tubes
Processed into products: Drawn parts: pots, pans, cutlery, Stamped parts: brackets, clamps, hinges, Formed panels: elevator interiors, escalator skirts, Welded assemblies: framework, support structures
Application industries: Household appliances, Architecture & construction, Automotive, Food processing equipment, Chemical engineering (nitric acid tanks)
SUS430 Ferritic Stainless Steel Plate/Coil Similar/Alternative Material Recommendations
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Japan | JIS G 4304 | SUS430LX | Low carbon + Ti/Cb stabilized for better weldability; slightly lower strength |
| USA | ASTM A240 | 434 | Contains 0.75–1.25% Mo for improved pitting resistance |
| EU | EN 10088-2 | 1.4017 (X6CrNi17-1) | Contains about 1% Ni for toughness improvement |
| Global | – | SUS430J1L | Extra-low interstitial (C+N), higher Cr; for deep drawing |
Notes:
- SUS430 becomes brittle at temperatures around 475°C and sigma phase formation above 550°C; avoid prolonged exposure in these ranges.
- Post-weld annealing is recommended to restore ductility and corrosion resistance.
- Magnetic properties make it suitable for induction cooktop applications.
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