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Stainless Steel 303

Grade Summary: Stainless Steel 303 is a chromium-nickel stainless steel with added sulfur or selenium and phosphorus to improve machinability and non-seizing properties. It is the most free machining of the chromium-nickel grades, and is non-magnetic in the annealed condition.

Typical Applications: 

  • Aircraft parts and parts requiring machining
  • Grinding or polishing with good corrosion resistance.
  • Excellent for moving parts and where low magnetic permeability is required.

Available products: 

Typical Chemical Analysis:

303 (Sulfur):

  1. *C – .15 *Mn – 2.00 Max *P.15 Max *S.15 Max *Si – 1.00 Max
  2. *Cr – 17.00/19.00*Ni – 8.00/10.00 *Cu – .75 Max *Mo – .75 Max

303 (Selenium ):

  1. *C – .15 Max *Mn – 2.00 Max *P.17 Max *S.04 Max *Se – .15/.40
  2. *Si – 1.00 Max *Cr – 17.00/19.00 *Ni – 8.00/10.00 *Cu – .75 Max *Mo – .75 Max

Typical Mechanical Properties** :

Tensile Strength (PSI) 90,000
Yield Point (PSI) 35,000
Elongation*** 50

* Chemical Analysis will vary on each heat number
** All values are averaged and are representative.
*** (% in 2”).

Metal Supermarkets offers a variety of shapes and sizes of stainless steel, cut to the size you need

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