Alloy 304/304L (UNS S30400/S30403) Stainless Steel Plate
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Alloy 304/304L (UNS S30400/S30403) is the most widely utilized "18-8" chromium-nickel austenitic stainless steel. It is an economical and versatile corrosion resistant alloy suitable for a wide range of general purpose applications.
| Property | 304 Stainless Steel Plate | 304L Stainless Steel Plate |
|---|---|---|
| Corrosion Resistance | Excellent in a wide range of environments | Excellent, particularly resistant to intergranular corrosion |
| Applications | Kitchen equipment, chemical containers, architectural use | Chemical processing, storage tanks, heat exchangers |
| Weldability | Good | Excellent, low carbon content minimizes carbide precipitation |
| Modulus of Elasticity | 29.0 x 10⁶ psi (200 GPa) | 29.0 x 10⁶ psi (200 GPa) |
| Thermal Conductivity | 9.4 BTU/hr/ft²/ft/°F (16.3 W/m-K) at 212°F (100°C) | 9.4 BTU/hr/ft²/ft/°F (16.3 W/m-K) at 212°F (100°C) |
| Electrical Resistivity | 29.1 Microhm-in at 68°F (73 Microhm-cm at 20°C) | 29.1 Microhm-in at 68°F (73 Microhm-cm at 20°C) |
It is common practice for 304L to be dual certified as 304 and 304L. The low carbon chemistry of 304L combined with an addition of nitrogen enables 304L to meet the mechanical properties of 304.
Alloy 304/304L resists atmospheric corrosion, as well as, moderately oxidizing and reducing environments. The alloy has excellent resistance to intergranular corrosion in the as-welded condition. Alloy 304/304L has excellent strength and toughness at cryogenic temperatures.
Alloy 304/304L is non-magnetic in the annealed condition, but can become slightly magnetic as a result of cold working or welding. It can be easily welded and processed by standard shop fabrication practices.
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