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Properties and composition of type 304 stainless steel

DataTime:[10/28/2014]

Yaang Pipe Industry Co., Limited is a leading manufacturer of Super duplex stainless steel products including Super duplex stainless steel flanges, duplex steel flangesStainless Steel flangesStainless Steel pipesStainless Steel tubesStainless Steel pipe fittings.

Stainless Steel 304

Stainless Steel 304 is the most widely used austenitic stainless steel. Also known as '18-8' stainless because of its 18 percent chromium content and 8 percent nickel content, 304 stainless steel has good forming and welding properties, as well as strong corrosion resistance and strength, even at extremely low temperatures.

Stainless Steel 304 has good drawability, can be formed into a variety of shapes and can often be used without annealing, in contrast to type 302 which must be annealed in order to maintain adequate corrosion resistance Common uses for type 304 stainless steel include in the food industry, for brewing, milk processing, wine making, and 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, it 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 stainless steel flanges, stainless steel pipes and stainless steel pipe fittings.

Stainless Steel 304L is an extra-low carbon version of the 304 stainless 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.

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)

Type 304 and 304L Stainless Steel Composition

Element Type 304 (%) Type 304L (%)
Carbon 0.08 max. 0.03 max.
Manganese 2.00 max. 2.00 max.
Phosphorus 0.045 max. 0.045 max.
Sulfur 0.03 max. 0.03 max.
Silicon 0.75 max. 0.75 max.
Chromium 18.00-20.00 18.00-20.00
Nickel 8.00-12.00 8.00-12.00
Nitrogen 0.10 max. 0.10 max.
Iron Balance Balance

Source: Yaang Pipe Industry

Tel No:+86-18267732328 / Fax No :86-0577-56809281 / Email:sales@yaang.com
Address:Longwan District, Wenzhou, Zhejiang Province, China.

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