303 Stainless Steel
T-303 is one of the 3 main alloys of commercially available stainless steel. It has mechanical properties that are comparable to both 304 and 316 stainless. The primary reason to use 303 is when you need a stainless steel with machining capabilities better than that of 304 and 316. It has roughly the same corrosion resistance as 304, but not as good as 316. The main drawback with the alloy is that it is not generally considered to be weldable. This material is hardenable by cold work.