What is the difference between 304 and ss304l stainless steel?

SUS304L is the extra low carbon of typical austenitic stainless steel SUS304.
It has a lower carbon content than SUS304 and has particularly excellent intergranular corrosion resistance. It is also suitable for deep drawing due to its low hardness in the annealed finish and low work hardening.
*The "L" in SUS304L stands for low carbon.