Meaning of stainless steel grade suffix

304, 304L, 316N, 310S, 303Cu and 316F are common meanings:

1. S, high temperature resistant material;

2. F, free cutting material;

3. Cu, represents free cutting material containing copper;

4. L, indicating low carbon content;

5. H means high carbon content, mainly used in high temperature occasions;

6. N means adding element n to improve strength;