AISI 304 / 304L
AISI 304 / 304L (UNS S30400 / UNS S30403) is a general purpose 18/8 stainless steel with good strength and excellent corrosion resistance. Used for food processing, architectural trim, brewing and oil refinery equipment. Subject to pitting and crevice corrosion in warm chloride components. 304L is a low carbon variant of 304 and more suitable for welding.