430 Stainless Steel (S43000) Ferritic Stainless Steel Plate/Coil
430 Stainless Steel (S43000) Ferritic Stainless Steel Plate/Coil - Properties & Applications
Comprehensive technical data for 430 (S43000) ferritic stainless steel including chemical composition, mechanical and physical properties, equivalent grades, and application guide.
Bending, drawing, blanking, roll forming, moderate deep drawing, welding (preheat and post-weld heat treatment recommended), polishing, buffing, electro-polishing
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430 Stainless Steel Ferritic Stainless Steel Plate/Coil Introduction
430 stainless steel, designated as UNS S43000, is a ferritic, non-hardenable grade offering good corrosion resistance and formability. It is magnetic and has excellent resistance to oxidation at elevated temperatures. Typical applications include household appliances, automotive trim, and architectural panels. The alloy is cost-effective due to low nickel content. It can be welded, drawn, and formed, but it is prone to grain growth at high temperatures. In the annealed condition, it provides a combination of moderate strength and good ductility. While not as corrosion-resistant as austenitic grades, it performs well in mildly corrosive environments and where surface appearance is important.
430 Stainless Steel Ferritic Stainless Steel Plate/Coil Chemical Composition
Chemical composition according to ASTM A240/A240M for 430 (UNS S43000) stainless steel. The alloy is a non-stabilized ferritic grade with chromium as the main alloying element. Low carbon ensures resistance to intergranular corrosion after welding when sections are thin.
| Element | Standard Value | Notes |
|---|---|---|
| Carbon (C) | ≤0.12 | |
| Manganese (Mn) | ≤1.00 | |
| Phosphorus (P) | ≤0.040 | |
| Sulfur (S) | ≤0.030 | |
| Silicon (Si) | ≤1.00 | |
| Chromium (Cr) | 16.0–18.0 | Key element for corrosion resistance |
| Nickel (Ni) | ≤0.75 | Low nickel reduces cost |
| Nitrogen (N) | ≤0.10 | Optional, but commonly reported |
| Iron (Fe) | Balance | Remainder |
430 Stainless Steel Ferritic Stainless Steel Plate/Coil Thermal and Electrical Physical Properties
Physical properties represent typical values for fully annealed 430 stainless steel. Thermal conductivity decreases slightly with temperature, while thermal expansion increases. These values are useful for design calculations in heating/cooling and structural applications.
| Property | Typical Value | Unit | Test Condition |
|---|---|---|---|
| Density (ρ) | 7.75 | g/cm³ | At 20 °C |
| Modulus of Elasticity (E) | 200 | GPa | Tension, at 20 °C |
| Shear Modulus (G) | 77 | GPa | Calculated from E and ν |
| Poisson's Ratio (ν) | 0.27–0.30 | Elastic range | |
| Thermal Expansion Coefficient (α) | 10.4 | ×10⁻⁶/K | 20–100 °C |
| Thermal Expansion Coefficient (α) | 11.0 | ×10⁻⁶/K | 20–300 °C |
| Thermal Expansion Coefficient (α) | 11.4 | ×10⁻⁶/K | 20–500 °C |
| Thermal Conductivity (λ) | 26.1 | W/(m·K) | At 100 °C |
| Thermal Conductivity (λ) | 26.2 | W/(m·K) | At 500 °C |
| Specific Heat Capacity (Cp) | 460 | J/(kg·K) | 0–100 °C |
| Electrical Resistivity (ρe) | 600 | nΩ·m | At 20 °C |
430 Stainless Steel Ferritic Stainless Steel Plate/Coil Mechanical Properties
Minimum mechanical properties at room temperature for annealed condition per ASTM A240/A240M. Properties apply to plate, sheet, and coil in standard gauges. Elongation requirement may be reduced for very thin gauges as per the standard. Hardness values are typical maximums.
| Property | Required Value | Unit | Test Condition |
|---|---|---|---|
| Tensile Strength (Rm) | ≥450 | MPa | Transverse or longitudinal section |
| Yield Strength (Rp0.2, ReH) | ≥205 | MPa | 0.2% offset method |
| Elongation (A) | ≥22 | % | In 50 mm gauge length; for thickness ≤1.5 mm, value may be reduced per standard |
| Hardness | ≤88 HRBW | Rockwell B scale | |
| Bend Test | 180° bend, bend diameter = specimen thickness | No cracks after bending, axis of bend transverse to rolling direction |
430 Stainless Steel Ferritic Stainless Steel Plate/Coil Fully Equivalent Material Standards and Substitutable Grades
| Country/Region | Standard | Grade | Notes |
|---|---|---|---|
| Europe | EN 10088-2 | 1.4016 (X6Cr17) | Ferritic stainless steel, identical composition and properties |
| Japan | JIS G4304/G4305 | SUS430 | |
| China | GB/T 20878, GB/T 3280 | 10Cr17 (old 1Cr17) | Equivalent ferritic grade |
| Germany | DIN EN 10088-2 (superseded DIN 17440) | 1.4016 | |
| International | ISO 15510 | X6Cr17 | Covers ferritic stainless steel X6Cr17 |
| USA | ASTM A240/A240M | 430 (UNS S43000) | Base specification |
430 Stainless Steel Ferritic Stainless Steel Plate/Coil Application Introduction
430 stainless steel is extensively used where moderate corrosion resistance, formability, and visual appeal are required. It is not suitable for severe chloride environments or for high-strength structural applications at elevated temperatures. The alloy polishes to a bright, durable finish, making it a popular choice for decorative items.
Product Applications: Washing machine drums and inner tubs, Refrigerator panels and liners, Automotive trim, moldings, and exhaust systems, Kitchen sinks, backsplashes, and range hoods, Interior decorative panels and column covers, Heat exchanger baffles and plates
Processed into products: Dishwasher liners and racks, Fasteners, bolts, and screws, Flanges and pressure vessel components, Architectural grates and meshes, Stamped and formed brackets, Trim rings and bezels
Application industries: Household Appliances, Automotive, Architecture and Construction, Food Processing, Heat Exchangers, General Engineering
430 Stainless Steel Ferritic Stainless Steel Plate/Coil Similar/Alternative Materials with Comparable Properties
| Country/Region | Standard | Grade | Notes |
|---|---|---|---|
| USA | ASTM A240 | 434 (S43400) | Added 0.75-1.25% Mo for improved pitting resistance |
| USA | ASTM A240 | 430F (S43020) | Free-machining variant with higher sulfur |
| EU | EN 10088-2 | 1.4104 (X14CrMoS17) | Free-machining ferritic with Mo; better machinability |
| EU | EN 10088-2 | 1.4113 (X6CrMo17-1) | Contains Mo for enhanced corrosion resistance similar to 434 |
| Japan | JIS G4304 | SUS434 | Equivalent to 434 |
| China | GB/T 20878 | 022Cr17Ti (1.4510) | Titanium-stabilized for improved intergranular corrosion resistance after welding |
Notes:
- Avoid prolonged exposure at 400–550 °C to prevent 475 °C embrittlement.
- Not recommended for use in concentrated nitric acid above 60% or in solutions containing chlorides.
- Post-weld annealing is advised to restore ductility and reduce grain boundary sensitization in heavy sections.
- Magnetic in all conditions; can be used where magnetic properties are required.
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