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303 Stainless Steel

Shapes Available

  • Coil
  • Flat Bar
  • Hex Bar
  • Pipe
  • Round Bar
  • Sheet


  • Manufacturing
  • Natural Gas
  • Oil Refining
  • Wind Power

Industry Names

  • 303 Stainless
  • 303


  • Stainless Steel


  • AMS 5640 Type 1
  • ASTM A582
  • UNS S30300


  • Food Industry Applications
  • Shafts
  • Valve Bodies


  • Good Corrosion Resistance
  • Great Machinability

303 Stainless Steel is a free machining austenitic stainless steel. With the addition of sulfur, this non-magnetic stainless steel allows for smooth, high speed machining. 303 has good corrosion resistance and is used for applications that must have a good deal of machining.

303 stainless steel comes in the following shapes: round bar, flat bar, hex bar, sheet, pipe, and coil.

Please contact us to request a quote. We specialize in hard to find material.

We work closely with many manufacturers in the aerospace & defense industry. We work with NADCAP approved heat treaters and testing laboratories. We can supply DFARS compliant material.

Metal Properties
Electrical Resistivity 433 Ohms (circ mil./ft.)
Melting Range 2550-2590 °F
Poisson's Ratio 0.3
.2% Yield Strength 35 ksi
Density .285 lb/inch³
Elongation 50 %
Hardness Max, Brinell 160
Ultimate Tensile Strength 90 ksi
Chemical Composition
C- .15
Cr17.0 19.0
Fe- Bal
Mn- 2.0
Mo- .6
Ni8.0 10.5
P- .045
Si- 1.0

DISCLAIMER: The information provided on this Web site, technical or otherwise, is merely for informational purposes, and is not intended to serve as a guide, manual, instructions, or any kind reference for proper safety procedures or material purchasing. Michlin Metals makes no warranty, express or implied, based on the statements on this Web site and, as such, will not be liable for any damages, either direct or indirect, including but not limited to consequential damages, such as damages for loss of profits, that may arise based on reliance on the information provided on this Web site. Some information has been referenced from reliable industry sources. Tradenames listed are the sole property of the tradename owners. Michlin Metals typically provides branded products through its relationships with mills and authorized re-sellers. Equivalent non-branded product is sometimes also available through certified sources of such products. Michlin Metals will never substitute non-branded product when branded product is requested.

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