430 Stainless Steel Sheet
Cost-effective ferritic stainless steel sheet for atmospheric corrosion protection in commercial applications
430 stainless steel sheet delivers reliable atmospheric corrosion resistance with exceptional cost-effectiveness. Ideal for architectural facades, automotive trim, and general industrial applications where budget optimization and reliable performance are balanced priorities.
Quick Specifications
- UNS Designation
- S43000
- Werkstoff Number
- 1.4016
- Yield Strength (Annealed)
- 240 MPa (35 ksi) minimum
- Tensile Strength (Annealed)
- 430 MPa (62 ksi) minimum
- Elongation (Annealed)
- 22% minimum
- Density
- 7.75 g/cm³
Standards & Certifications
Product Description
430 stainless steel sheet is a ferritic grade engineered for applications requiring atmospheric corrosion protection without the cost of austenitic stainless steel grades. The 16-18% chromium composition provides excellent resistance to oxidation in atmospheric exposure, freshwater, and mildly corrosive industrial environments. As a ferritic grade, 430 offers significant advantages including superior yield strength (240 MPa vs 170 MPa for 304), better fatigue properties, lower thermal expansion coefficient, and cost savings of 20-30% compared to equivalent austenitic stainless alternatives.
The production of 430 stainless sheet involves hot rolling of carefully selected chromium stainless steel followed by controlled cooling and precision annealing at 700-800°C. The lower annealing temperature compared to austenitic stainless reduces energy requirements and processing costs while developing optimal ferritic microstructure with good mechanical properties. Cold rolling can be employed to produce cold-rolled sheet with tighter dimensional tolerances and superior surface finish for precision applications. Final pickling removes surface oxides while passivation establishes the protective oxide film.
430 stainless sheet demonstrates excellent formability in the annealed condition, allowing for stamping, bending, and press forming operations typical of commercial sheet metal fabrication. The material is readily machinable and can be precisely cut using standard shearing and cutting equipment. The non-sensitizing nature of ferritic 430 eliminates chromium carbide precipitation during welding, allowing welded constructions without requiring costly post-weld heat treatment, though careful thermal management is still recommended.
The ferritic microstructure provides superior thermal and electrical conductivity compared to austenitic stainless, useful for heat exchanger applications and specialized thermal processing equipment. The magnetic properties of ferritic stainless allow for magnetic applications and specialized component designs. Standard finishes include mill finish, pickled, and passivated, with brushed and polished finishes available for architectural and decorative applications.
Specifications
| UNS Designation | S43000 |
| Werkstoff Number | 1.4016 |
| Yield Strength (Annealed) | 240 MPa (35 ksi) minimum |
| Tensile Strength (Annealed) | 430 MPa (62 ksi) minimum |
| Elongation (Annealed) | 22% minimum |
| Density | 7.75 g/cm³ |
| Sheet Thickness Range | 0.5 mm to 3 mm (standard); up to 6 mm available |
| Modulus of Elasticity | 200 GPa |
| Thermal Conductivity (at 20°C) | 26 W/m·K (superior to 304) |
| Coefficient of Linear Expansion | 10.4 × 10⁻⁶ /°C (0-100°C) |
| Pitting Resistance Equivalent (PRE) | 16 (adequate for atmospheric use) |
| Magnetic Properties | Ferromagnetic |
Chemical Composition
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 16.0-18.0 |
| Carbon (C) | 0.12 max |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 1.0 max |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.030 max |
| Nickel (Ni) | 0.50 max |
| Nitrogen (N) | 0.10 max |
| Iron (Fe) | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Cold Rolled 25%) | 515 MPa minimum |
| Yield Strength (Cold Rolled 25%) | 310 MPa minimum |
| Elongation (Cold Rolled 25%) | 18% minimum |
| Hardness (Annealed) | 217 HV maximum |
| Impact Strength (Charpy V-notch) | 40 J at room temperature |
| Fatigue Strength | 170 MPa at 10⁷ cycles |
Key Features & Advantages
Applications
Architectural Cladding
Building facade systems, wall cladding panels, and architectural trim in urban and rural environments providing decades of attractive appearance and reliable corrosion protection.
Automotive Components
Automotive trim rings, badges, decorative panels, and protective components exposed to atmospheric and road salt environments with requirements for cost-effective performance.
Appliance Manufacturing
Appliance housings, washing machine components, and consumer product enclosures requiring corrosion protection and cost-effective manufacturing.
Structural Components
Industrial equipment housings, machinery guards, and structural reinforcement where higher strength and cost-effectiveness outweigh the need for maximum corrosion resistance.
Heat Exchanger Tubes
Industrial heat exchanger sheets, thermal equipment components, and cooling system internals benefiting from superior thermal conductivity compared to austenitic stainless.
Environmental Equipment
Water treatment system components, renewable energy equipment, and agricultural machinery requiring atmospheric corrosion protection with budget optimization.
Frequently Asked Questions
Why choose 430 stainless sheet over 304 for a project?
Can 430 stainless sheet be formed and stamped?
Is 430 stainless weldable?
How does 430 perform in seawater applications?
What maintenance is required for 430 stainless sheet?
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