430 Stainless Steel
At a Glance
| Property | Details |
|---|---|
| Available Forms | Bar, Sheet, Foil, and Strip |
| Alloy Type | Ferritic Straight-Chromium Stainless Steel |
| Corrosion Resistance | Good corrosion and oxidation resistance in mild environments |
| Hardness | Non-hardenable by heat treatment; may be strengthened through cold working |
| Durability | Good durability for appliance, decorative, kitchen, and light industrial applications |
| Formability | Good formability for bending, drawing, and stretch-forming operations |
| Key Advantages | Magnetic, nickel-free, cost-effective, oxidation resistant, and suitable for decorative or functional stainless components |
| Common Applications | Dishwasher linings, automotive trim, chimney liners, machine parts, kitchen tables, utensils, appliances, and food service equipment |
| Specifications | AMS 5627, ASTM A276, ASTM A479, ASTM A240, UNS S43000 |
430 Stainless Steel is a ferritic, straight-chromium stainless steel known for its good corrosion resistance, oxidation resistance, formability, and cost effectiveness. Unlike austenitic stainless steels such as 304 and 316, 430 contains little to no nickel, making it a more economical option for applications that require stainless corrosion resistance but do not need the higher strength, ductility, or chloride resistance of nickel-bearing grades.
Because 430 is ferritic, it is magnetic and cannot be hardened by heat treatment. Instead, it is generally supplied in the annealed condition and may be strengthened through cold working. It performs well in mildly corrosive environments and offers good resistance to atmospheric corrosion, fresh water, food-related environments, and many indoor or decorative applications.
430 Stainless Steel is commonly formed using bending, drawing, stretch forming, and other cold-forming operations. It offers good formability, although it is not as ductile as austenitic stainless grades. Welding is possible, but 430 has lower weldability than many austenitic stainless steels and may require proper welding procedures to reduce brittleness or loss of corrosion resistance in the heat-affected area.
Although 430 Stainless Steel has a higher maximum carbon level than some other stainless grades, its ferritic straight-chromium structure is the main reason it is non-hardenable by heat treatment.
One important advantage of 430 Stainless Steel is its resistance to oxidation at elevated temperatures. It is often used where resistance to scaling, moderate heat, and general corrosion are needed. This makes it useful for both decorative and functional components across appliance, automotive, kitchen equipment, and light industrial applications.
430 Stainless Steel is widely used in products such as:
- Dishwasher linings
- Automotive trim
- Chimney liners
- Machine parts
- Kitchen tables and utensils
- Appliance panels and trim
- Food service equipment
- Decorative stainless components
Chemical Data, Mechanical Properties and Specifications for 430 Stainless Steel
Chemical Range for 430
| Element | Minimum | Maximum |
|---|---|---|
| Carbon | -- | 0.12 |
| Chromium | 16.0 | 18.0 |
| Iron | Balance | -- |
| Manganese | -- | 1.0 |
| Phosphorus | -- | 0.04 |
| Silicon | -- | 1.00 |
| Sulphur | -- | 0.03 |
Typical Mechanical Properties for 430
| Form | Tensile Strength | Yield Strength | Elongation at Break |
|---|---|---|---|
| Annealed Bar | 75 ksi | 45 ksi | 30% |
| Cold Drawn Bar | 85 ksi | 70 ksi | 20% |
| Annealed Plate | 75 ksi | 40 ksi | 30% |
| Annealed Strip | 75 ksi | 50 ksi | 25% |
Specifications
- AMS 5627 (Bar)
- ASTM A276 (Bar)
- ASTM A479 (Bar)
- ASTM A240 (Sheet and Plate)
- UNS S43000