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303 Rod
Stainless Steel ASTM-A370

Chromium Carbon Iron Manganese Molybdenum Nickel Phosphorus Silicon Sulfur (Sulphur) 
17-19% 0.15% Max. 67.05-74.85% 2% Max. 0.6% Max. 8-10% 0.2% Max. 1% Max. 0.15% Min. 


303 stainless steel’s corrosion resistance and great machinability make it one of the most popular free machining stainless steels available. It is used in a wide variety of parts from screw to general machining. Grade 303 does not respond to heat treatment, but the toughness is still excellent as with other austenitic grades.

  • Most machinable
  • Resistant to atmospheric corrosion
Meets ASTM-A370 Specifications (The following are also available upon request:)
  • AMS-2241
  • ASTM-A370
Forms Available

Flat BarThickness 0.125" to 2.5"Width 0.500" to 6"Request a Quote! 
RoundDiam. 0.094" to 14"Request a Quote!  

Physical Properties
Density0.289Lbs. per cubic inch @ 68°F (annealed)
Modulus28Elastic modulus in tension x 106 P.S.I.
Thermal Expansion9.9Inches per inch x 10-6 from 68°F to 572°F
Electrical Resistivity7.2microhm-cm

Mechanical Properties
Tensile StrengthYield OffsetElongationHardness
x 1000 P.S.I.0.2% offset x 1000 P.S.I.% in 2 Inches
 Cold Drawn
10-40B 96
9-50B 83

Hardness Legend  B : Rockwell (100 kgf Steel Sphere)  

NOTE: The information contained herein are intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. It is given without obligation or liability. Contact us for manufacturers' complete material property datasheets.

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