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Type 304 is the most widely used austenitic stainless steel.
Also known as '18-8' stainless because of its composition, which includes 18 percent chromium and 8 percent nickel, 304 stainless steel has good forming and welding properties, as well as strong corrosion resistance and strength.
Type 304 stainless steel also has good drawability, can be formed into a variety of shapes and, in contrast to type 302 stainless, can be used without annealing.
Uses:
Common uses for type 304 stainless steel include in the food industry; for brewing, milk processing, wine making, as well as in pipelines, yeast pans, fermentation vats and storage tanks.
Due to its ability to withstand corrosion by various chemicals found in fruits, meats and milk, 304 grade stainless is also found in sinks, tabletops, coffee pots, refrigerators, stoves and various other utensils and cooking appliances. Other areas of use include in architecture, chemical containers, heat exchangers, mining equipment, and in marine nuts, bolts and screws.
Type 304L:
Type 304L stainless steel is an extra-low carbon version of the 304 steel alloy.
The lower carbon content in 304L minimizes deleterious carbide precipitation as a result of welding. Consequently, 304L can be used 'as welded' in severe corrosion environments and eliminates the need for annealing. However, this grade has slightly lower mechanical properties than the standard 304 grade.
304 Stainless Physical Properties:
- Density: 0.803g/cm3
- Electrical resistivity: 72 microhm-cm (20C)
- Specific Heat: 0.50 kJ/kg-K (0-100°C)
- Thermal conductivity: 16.2 W/m-k (100°C)
- Modulus of Elasticity (MPa): 193 x 103 in tension
- Melting Range: 2550-2650°F (1399-1454°C)
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