304 is an austenitic stainless steel, while 904L is a completely austenitic structure and is insensitive to the precipitation of ferrite and α phase.

316 stainless steel contains more nickel and molybdenum, has stronger corrosion resistance and low-temperature impact toughness, and is suitable for marine environments or high chloride environments. 304 stainless steel performs well in general environments or mildly corrosive environments and has a lower cost.

‌316/316L cold-rolled stainless steel plate‌ is a high-performance stainless steel material widely used in various industrial fields.

The main components of 304 stainless steel include about 18% chromium and 8% nickel, which makes it have good corrosion resistance and oxidation resistance.

ASTM A213 TP 316L is a stainless steel material standard, mainly used to manufacture various seamless and welded austenitic stainless steel pipes.

316 stainless steel is food grade and can be used in water supply equipment. The strength and yield of 304 and 316 stainless steel are equal.