ASTM A240 430 Stainless Steel Sheet with NO.4 Finishing and Corrosion Resistance for Industrial Applications
Price:
US $1.48-2.66 / kg
MOQ:
100 kg
Delivery Time:
Negotiable
Product Description
ASTM A240 430 Stainless Steel Sheet
AISI430 stainless steel cold rolled SS sheet with NO.4 finishing, offering excellent corrosion resistance and formability for industrial applications.
Product Specifications
Product: 430 Stainless Steel Sheet
Thickness: Cold rolled 0.3-3.0mm, Hot rolled 4.0-10.0mm
Standard Size: Cold rolled 1000×2000mm, 1219×2438mm; Hot rolled 1500×6000mm
Surface: 2B, BA, NO.4, Hairline, Mirror, 8K, etc.
Brand: TISCO, JISCO, POSCO, BAOSTEEL
Standard: ASTM A240 / JIS G4305 / EN 10088-2
Other Grades: 201, 202, 301, 304, 304L, 309S, 310S, 316L, 316Ti, 317L, 321, 347, 410, 420, 430, 440, 441, 443, 444, 2205, 2507, etc.
Our Services: Slit cutting, surface processing
430 Stainless Steel Overview
Stainless steel grade 430 is a non-hardenable steel containing straight chromium, belonging to the ferritic group of steels. Known for its good corrosion resistance and formability, coupled with practical mechanical properties, it can be used in various chemical applications.
Key Properties
Grade 430 stainless steel offers excellent stress corrosion cracking resistance with properties covered under ASTM A240/A240M standards.
Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N |
|---|---|---|---|---|---|---|---|---|---|
| 430 | - 0.12 | - 1 | - 1 | - 0.04 | - 0.030 | 16-18 | - | - 0.50 | - |
| 430F | - 0.12 | - 1.25 | - 1 | - 0.06 | 0.15 - | 16-18 | - | - | - |
Mechanical Properties
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness Rockwell B (HR B) max | Hardness Brinell (HB) max |
|---|---|---|---|---|---|
| 430 | 483 | 310 | 22 | 85 | 183 |
| 430F | 552 typical | 379 typical | 25 typical | - | 262 |
Physical Properties
| Grade | Density (kg/m³) | Elastic Modulus (GPa) | Thermal Expansion (μm/m/°C) | Thermal Conductivity (W/m.K) | Specific Heat (J/kg.K) | Electrical Resistivity (nΩ.m) |
|---|---|---|---|---|---|---|
| 430 | 7750 | 200 | 10.4 | 26.1 | 460 | 600 |
| 430F | 7750 | 200 | 10.4 | 26.1 | 460 | 600 |
Grade Specification Comparison
| Grade | UNS No | British BS | British En | Euronorm No | Euronorm Name | Swedish SS | Japanese JIS |
|---|---|---|---|---|---|---|---|
| 430 | S43000 | 430S17 | 60 | 1.4016 | X8Cr17 | 2320 | SUS 430 |
| 430F | S43020 | - | - | 1.4104 | X12CrMoS17 | 2383 | SUS 430F |
Alternative Grades
| Grade | Reasons for choosing 430 |
|---|---|
| 430F | Higher machinability than 430 is needed in bar product, and reduced corrosion resistance is acceptable |
| 434 | Better pitting resistance is required |
| 304 | Slightly higher corrosion resistance is needed, together with greatly improved ability to be welded and cold formed |
| 316 | Much better corrosion resistance is needed, coupled with greatly improved ability to be welded and cold formed |
| 3CR12 | Lower corrosion resistance is acceptable in a cost-critical application |
Performance Characteristics
Corrosion Resistance
All ferritic grades, including stainless steel grade 430, have excellent stress corrosion cracking resistance. Grade 430 provides good corrosion resistance to numerous substances, with maximum resistance in well-polished or buffed condition. Its pitting and crevice corrosion resistance is similar to grade 304.
Heat Resistance
Stainless steel grade 430 can resist oxidation up to 870°C (1598°F) in intermittent usage and up to 815°C (1499°F) in continuous usage. Brittleness may occur at room temperature after prolonged heating in the 400-600°C (752-1112°F) range, which can be overcome with annealing.
Heat Treatment
Solution annealing is performed by heating to 815-845°C (1499-1553°F), followed by slow furnace cooling to 600°C (1112°F) and rapid air-cooling. Sub-critical annealing involves heating to 760-815°C (1400-1499°F) followed by air-cooling or water quenching. This stainless steel cannot be hardened by thermal treatment.
Welding
Pre-heating at 150-200°C (302-392°F) is required for welding grade 430. Post-weld annealing at 790-815°C (1454-1499°F) may be necessary if embrittlement occurs. Recommended filler rods include grade 430, 308L, 309, or 310 based on application requirements.
Machining
Grade 430 offers better machinability than standard austenitic steels like grade 304, though galling may occur. Lightly drawn bars are easier to machine than annealed bars. Grade 430F provides excellent machinability.
Fabrication
With a low work hardening rate, grade 430 facilitates easy bending and forming. However, low ductility limits rigorous operations. Grade 430 wire can handle rigorous cold heading, with sub-critical intermediate annealing potentially required for extreme cold working.
Applications
- Dish washer linings
- Refrigerator cabinet panels
- Element supports and fasteners
- Stove trim rings and chimney liners
- Automotive trim and lashing wires
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Company
JIANGSU MITTEL STEEL INDUSTRIAL LIMITED
Location
No.283-1, Youyi Middle Road, Xishan District, Wuxi City, Jiangsu Province
Contact Person
Gao Ben