Stainless Steel
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Chemical Data, Mechanical Properties and Specifications for 303 Stainless Steel

Chemical

Chemical Range For 303
Element Minimum Maximum
Carbon -- 0.15
Chromium 17.0 19.0
Iron Balance --
Manganese -- 2.0
Molybdenum -- 0.6
Nickel 8.0 10.0
Phosphorus -- 0.20
Silicon -- 1.0
Sulphur 0.15 --
Chemical Range For 303 SE (Free Machining)
Element Minimum Maximum
Carbon -- 0.15
Chromium 17.0 19.0
Iron Balance --
Manganese -- 2.0
Nickel 8.0 10.0
Phosphorus -- 0.20
Selenium 0.15 --
Silicon -- 1.0
Sulphur -- 0.06

Mechanical

Typical Mechanical Properties for 303
Form Tensile Strength Yield Strength Elongation at Break
Annealed Bar 89.9 ksi 34.8 ksi 50%
Cold Drawn Bar 100.00 ksi 60.2 ksi 40%
Typical Mechanical Properties for 303 SE
Form Tensile Strength Yield Strength Elongation at Break
Annealed Bar 89.9 ksi 34.8 ksi 50%
Cold Drawn Bar 100.00 ksi 60.2 ksi 40%

Specs

Specifications
AMS 5640 Type 1 (303 Bar)
ASTM A582 (303 Bar)
AMS 5640 Type 2 (303 SE Bar)
ASTM A582 (303 SE Bar)
UNS S30300 (303 Bar)
UNS S30323 (303 SE Bar)

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