HRC 304, 304L, 316L; CRC 301, 304, 304L, 316L, 420, 430, 409
Type 304 and Type 304L have very similar chemical and mechanical properties and are often included on a
single material test certificate when the actual properties of a stainless steel plate meet the criteria of both
types.
This is a very common occurrence. Type 304L is a variation of Type 304 and has a lower carbon
content which improves weld ability and lowers the risk of reduced corrosion resistance around the weld.
Type 304L also has a slightly lower yield and tensile strength than Type 304.