Stainless Steel Alloy 303, A1

Type 303 Stainless Steel, also referred to as A1, is an often used non-magnetic, austenitic stainless steel. Type 303 is known for a number of important characteristics including:

  • Ease of fabrication
  • Outstanding heat resistance and oxidation when intermittently exposed to temperatures up to 760°C
  • Slightly higher corrosion resistance than Type 304

In order to be sold as Type 303 Stainless Steel, a product must have a unique chemical composition that includes the following:

  • Fe 69%
  • Cr 17-19%
  • Ni 8-10%
  • Mn 2.0%
  • Si 1.0%
  • P 0.20%
  • C 0.15% max
  • S 0.15% min

A wide number of industries use Type 303 Stainless Steel for many different applications including:

  • Aircraft fittings
  • Screws
  • Nuts and bolts
  • Gears
  • Bushings
  • Shafts
  • Food production

Continental Steel is a supplier and distributor of Type 303 Stainless Steel in a variety of forms and shapes like flat, round, and square bar.

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