Type 303 is a non-magnetic stainless steel, which is not hardenable by heat treatment. It is the free machining modification of the basic 18% chromium - 8% nickel stainless steel
303 has good resistance to oxidation at temperatures up to 1700°F. In extreme oxidizing atmospheres, irregular scaling may be encountered, particularly above 1400°F
Features of 303 stainless steel
Melted and processed to maximize machinability
Improved machinability over 304/304L and 316/316L
Applications of 303 stainless steel
Nuts and bolts
Bushings
Shafts
Aircraft fittings
Electrical switchgear components
Gears
In general any component that is heavily machined and where the corrosion resistance and fabrication properties of 303 are viable