AISI 430 Stainless Steel (SS430)
Straight chromium AISI 430 stainless steel (SS430) is one of the conventional ferritic stainless steels with magnetic properties and good formability, it has good corrosion resistance in a mild atmosphere, mild oxidizing acid and organic acid.
SS430 AISI Grade 430 Stainless Steel Properties Composition Magnetic Equivalent
Straight chromium AISI 430 stainless steel (SS430) is one of the conventional ferritic stainless steels with magnetic properties and good formability, it has good corrosion resistance in a mild atmosphere, mild oxidizing acid and organic acid.
AISI SAE ASTM 430 Datasheet
The tables below show type 430 stainless steel datasheet including chemical composition and properties.
Chemical Composition
The table below lists AISI 430 stainless steel composition.
| Type 430 Chemical Composition, % | |||||||||
| ASTM | AISI (UNS) | C, ≤ | Si, ≤ | Mn, ≤ | P, ≤ | S, ≤ | Cr | Ni, ≤ | Product |
| ASTM A240/A240M | 430 (UNS S43000) | 0.12 | 1.00 | 1.00 | 0.040 | 0.030 | 16.0-18.0 | 0.75 | Plate, Sheet, and Strip |
| ASTM A276/A276M | 0.12 | 1.00 | 1.00 | 0.040 | 0.030 | 16.0-18.0 | – | Bars and Shapes | |
- ASTM A240/A240M: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications.
- ASTM A276A/A276M: Standard Specification for Stainless Steel Bars and Shapes.
- ASTM A580/A580M: Standard Specification for Stainless Steel Wire.
AISI ASTM 430 Stainless Steel Mechanical Properties
The mechanical properties of type 430 stainless steel (SS430) is given in the tables below.
| SS 430 Mechanical Properties | ||||||||
| Type (UNS) | Tensile strength, MPa (ksi), ≥ | Yield strength, MPa (ksi), ≥ | Elongation in 50 mm, %, ≥ | Reduction in area, %, ≥ | Brinell Hardness, ≤ | Rockwell Hardness, ≤ | Cold Bend, ≤ 25 mm (1 in.) | Product form and Condition |
| 430 (UNS S43000) | 415 (60) | 207 (30) | 20 | 45 | – | – | – | Bar, Annealed, hot-finished or cold-finished |
| 450 (65) | 205 (30) | 22 | 183 HBW | 89 HRBW | 180° | Sheet, Plate and Strip | ||
| 485 (70) | 275 (40) | 16 | 45 | – | – | – | Wire, Annealed, Cold finished | |
Physical Properties
The tables below show the physical properties of 430 grade stainless steel (SS430).
| SS 430 Physical Properties | |
| Density, g/cm3 (lb/in.3) | 7.8 (0.28) |
| Melting point, °C (°F) | 1425-1510 (2600-2750) |
| Specific heat capacity, J/kg · K (Btu/lb · °F) | 460 (0.11) at 0-100 °C (32 to 212 °F) |
| Electrical resistivity, μΩ·m | 0.60 at 20 ℃ |
| 430 stainless steel magnetic permeability | 600-1100 (Approximate) |
| Elastic modulus (Modulus of elasticity), GPa (106 psi) | 200 (29.0) |
| Thermal diffusivity, mm2/s | 7.3 |
| Thermal conductivity, W/m · K (Btu/ft · h · °F) | 26.1 (15.1), at 100 ℃ (212 °F) |
| 26.3 (15.2), at 500 ℃ (932 °F) | |
| Coefficient of thermal expansion, μm/m · °C (μin./in. · °F) | 10.4 (5.8), at 0-100 ℃ (32-212 °F) |
| 11.0 (6.1), at 0-315 ℃ (32-600 °F) | |
| 11.4 (6.3), at 0-538 ℃ (32-1000 °F) | |
AISI ASTM 430 Stainless Steel Heat Treatment
- Annealing: Recommended annealing treatment for 430 steel is 705-790 °C (1300-1450 °F).
- Forging: Typical forging temperature for SS430 is 815-1120 °C (1500-2050 °F).
Heat Resistance
| Maximum service temperatures, °C (°F) | ||
| AISI | Intermittent service | Continuous service |
| 430 | 870 (1600) | 815 (1500) |
Welding
The ductility of type 430 stainless steel (SS430) is lower than that of austenite type, so weld cracking is more likely to occur, and a large amount of martensite is formed during cooling after welding, thereby increasing the sensitivity to cold cracking. It is recommended to preheat at a temperature of 150-230 °C to minimize weld cracking.
Corrosion Resistance
AISI 430 stainless steel (SS430) is suitable for use in mild atmospheres, as well as in mild oxidizing acids and organic acids. Type 430 stainless steel is limited in sulfuric acid environment; AISI 302 or 304 stainless steel replaces AISI 430 grade stainless steel in industrial environments; In food processing environment, AISI 304 is commonly used; Marine environment, heavily polluted atmosphere, chemicals and more severe corrosives require AISI 316 stainless steel or higher alloyed materials
SS 430 Stainless Steel Applications
- Cookware and tableware
- Worktable
- Automotive trim
- Air Filter
- Barbecue (BBQ) Grill
- Wall Mount Hood
- Kitchen Exhaust Hood
- Flanges
- Bolts
AISI 430 Equivalent Grade
AISI 430 stainless steel equivalent to Chinese GB, ISO, Japanese JIS, and European EN standard (Germany DIN EN, British BS EN…) for reference.
| AISI 430 equivalent grade | |||||||||||||
| US | European Union | Germany | ISO | Japan | China | Australia | |||||||
| Standard | Grade (UNS) | Standard | Grade (Steel Number) | Standard | Grade (Steel Number) | Standard | Grade (ISO Number) | Standard | Grade | Standard | Grade | Standard | Grade |
| AISI, ASTM A276/A276M; ASTM A240/A240M |
430 (UNS S43000) |
EN 10088-1; EN 10088-2; EN 10088-3 | X6Cr17 (1.4016) | DIN EN 10088-1; DIN 17440 |
X6Cr17 (1.4016) | ISO 15510 | X6Cr17 | JIS G4303 | SUS430 | GB/T 20878; GB/T 1220; GB/T 3280 |
1Cr17 (10Cr17) | ||
