What Is 430 Stainless Steel Plate?
430 Stainless steel plate is a flat-shaped sheet made of 430 stainless steel coil.
Grade 430 is a commonly used ferritic, straight chromium, and non-hardenable stainless steel, containing high chromium and no nickel. It combines mild corrosion resistance with great ductility and formability. Furthermore, it has valuable resistance to heat and oxidation and is not susceptible to stress corrosion cracking. But this grade does not work harden rapidly.
430 Stainless Steel Plate Chemical Formula
C ≤0.12, Si ≤1.0, Mn ≤1.0, Cr 16.0～18.0, Ni < 0.75, S ≤0.03, P ≤0.04, N ≤0.1, Mo 2.00-3.00%
Something About 430 Stainless Steel Plate Processing
Hot Working
430 stainless steel plate can be hot worked (like forging) in the temperature range of 1500 to 1900° F. However it is susceptible to excessive grain growth if exposed to high temperatures for too long, which will cause ‘orange peel’ texture and reduce ductility. So it should be air cooled quickly to room temperature.
Cold Working
Stainless Steel 430 plate can be cold formed by bending, deep drawing, and stretch forming, but it does not work harden as rapidly as 301 or 304 stainless steel.
Heat Treatment
This grade cannot be hardened by heat treatment.
Annealing can be done by heating to 815°C, soaking for 30 minutes per 25mm of thickness, furnace cooling to 600°C, then quickly air-cooling. Slow cooling from 540-400°C will cause embrittlement.
Sub-critical annealing should be heated to 760-815°C and then air-cooled or water-quenched.
Welding
Grade 430 has poor weldability compared to most stainless steels due to the higher carbon content and lack of stabilizing elements, which require post-weld heat treatment to restore corrosion resistance and ductility. Here are some cautions:
Pre-heat at 150-200°C if welding is necessary.
Annealing at 790-815°C can relieve embrittlement of the heat-affected zone.
Grain refinement will not occur.
Machining
The stainless steel plate of this type is relatively easily machined. And machining can be enhanced if the following rules are adhered to:
– Cutting edges must be kept sharp as dull edges will cause excess work hardening.
– Cuts should be light but deep enough to prevent work hardening by riding on the surface of the material.
– Chip breakers should be employed to assist in ensuring the swarf remains clear of the work.
– Low thermal conductivity of austenitic alloys results in heat concentrating at the cutting edges. This means coolants and lubricants are necessary and must be used in large quantities.
Fabricating
Stainless steel 430 plates can be processed with the help of various cuttings such as laser cutting, plasma cutting, saw cutting, dynamic waterjet cutting, machine cutting, etc. Then leveling and polishing is done. Leveling can be done to reduce scrap and to provide special lengths with improved quality and shape dimensions.
What Are Properties of 430 Stainless Steel Plate?
When it comes down to it, there are many benefits associated with using 430 stainless steel plates across various industries. Let’s see them one by one.
1. Corrosion Resistance: Grade 430 is a general-purpose steel with good resistance to mild corrosive environments, including nitric acid and some organic acids. It attains its maximum corrosion resistance when in highly polished or buffed condition. In addition, its resistance to pitting and crevice corrosion resistance is close to that of 304 stainless steel.
2. Heat Resistance: Grade 430 has good resistance to oxidation in intermittent service to 870°C and continuous service to 815°C. However, after prolonged heating at 400-600°C, this grade may become brittle at room temperature. This effect can be eliminated by annealing.
3. Processing Performance: It also possesses good formability capabilities so that it can be easily bent, stretched, or drawn into different shapes without losing its structural integrity. However, it is difficult to weld.
4. Mechanical Property
| Tensile Strength | > 450 Mpa |
| Yield Strength | >205 Mpa |
| Elongation（%） | > 22% |
| Hardness | HV≤200 HRB≤88 |
| Density | 7.75g/cm3 |
| Melting Point | 1427℃ |
5. Thermal Conductivity: It has better thermal conductivity and a smaller thermal expansion coefficient than austenitic stainless steel. It is also resistant to thermal fatigue.
6. Magnetism: Stainless steel plate is magnetic primarily because it contains large amounts of ferrite. This is a compound crystal structure of ferrite and iron. While some stainless steels contain ferrite, they do not exhibit a strong magnetic attraction.
7. Cost-effective Solution: SS 430 sheet and plate costs significantly less than that of 304 grade as it contains no nickel. Therefore, it makes 430 stainless steel a good value choice in mildly corrosive environments, widening its usage in various applications.
What Are 430 Stainless Steel Plates Used for?
Stainless steel 430 plates have become an alternative to 304 stainless steel plates and give a wide range of uses and benefits across many industries. They are best suited for applications where corrosion resistance holds higher importance than strength, ranging from food processing equipment to medical devices to transportation projects—and more. Here are some typical examples for your reference:
Home appliances, heat-resistant appliances, sanitary appliances, kitchen appliances;
Industrial roofing, wall cladding, facades, and other decorative architectural components;
Automotive trims, muffler systems, car bodies, engineer systems;
Benches, stairs, screens, burners, lashing wires, gutters, outdoor advertising columns;
industrial equipment like storage tanks, food processing equipment, scientific apparatuses;
Flue linings, dishwasher linings;
Fasteners, bolts, nuts, hinges.
Looking To Buy 430 Stainless Steel Sheet and Plate Metal?
Gnee Group offers supreme quality 430 stainless steel plates to our valuable patrons. Raw materials are purchased from reliable vendors that are quality-approved. Our factory is equipped with advanced production technology and each process has strict inspection and testing during production. In addition, our team can also cut sheets to size with great precision. Contact us today to find out more about how we can help you with your 430 stainless steel sheet and plate metal project.
