304L (S30403) Stainless Steel

304L (S30403) Stainless Steel

304L (S30403) Stainless Steel General Properties Alloy 304L a T-300 series stainless steel austenitic, which has a minimum of 18% chromium and 8% nickel. Type 304L has a carbon maximum is 0.030. It is the standard “18/8 stainless” that is commonly found in pans and cooking tools. Alloys 304L is...
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304L (S30403) Stainless Steel

General Properties

Alloy 304L a T-300 series stainless steel austenitic, which has a minimum of 18% chromium and 8% nickel. Type 304L has a carbon maximum is 0.030. It is the standard “18/8 stainless” that is commonly found in pans and cooking tools. 


Alloys 304L is the most versatile and widely used alloy in the stainless steel family. Ideal for a wide variety of home and commercial applications, Alloys 304L exhibits excellent corrosion resistance and has a high ease of fabrication, outstanding formability. The austenitic stainless steels are also considered to be the most weldable of the high-alloy steels and can be welded by all fusion and resistance welding processes.


Specifications: UNS S30403


Applications:

Alloy 304L Stainless Steel is used in a wide variety of home and commercial applications, including:

  • Food processing equipment, particularly in beer brewing, milk processing, and wine making

  • Kitchen benches, sinks, troughs, equipment, and appliances

  • Architectural trim and molding

  • Automotive and aerospace structural use

  • Construction material in large buildings

  • Chemical containers, including for transport

  • Heat exchangers

  • Nuts, bolts, screws, and other fasteners in the marine environment

  • Dyeing industry

  • Woven or welded screens for mining, quarrying & water filtration


Standards:

  • ASTM/ASME: S30403

  • EURONORM: 1.4303

  • AFNOR: Z2 CN 18.10

  • DIN: X2 CrNi 19 11


Corrosion Resistance:

  • Resistance to corrosion in oxidizing environments is a result of the 18 to 19% chromium that the 304 alloys contain.

  • Resistance to moderately aggressive organic acids is a result of the 9 to 11% nickel that the 304 alloys contain.

  • At times, alloy 304L may show a lower corrosion rate than the higher carbon Alloy 304; otherwise, the 304, 304L, and 304H may be considered to perform uniformly in most corrosive environments.

  • Alloy 304L is preferred for use in environments sufficiently corrosive to cause intergranular corrosion of welds and heat-affected zones on susceptible alloys.


Heat Resistance:

  • Good oxidation resistance in intermittent service to 1600°F and in continuous service to 1690°F.

  • Continuous use of 304 in the 800-1580°F range is not recommended if subsequent aqueous corrosion resistance is important.

  • Grade 304L is more resistant to carbide precipitation and can be heated into the above temperature range.


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