SS316L Tubes is an improved version of 304, with the addition of molybdenum and slightly higher nickel content. The resultant composition of AISI 316L tubes give the steel much increased corrosion resistance in many aggressive environments. The molybdenum makes type 316L pieps more resistant to pitting and crevice corrosion in chloride contaminated media, sea water and acetic acid vapours. The lower rate of general corrosion in mildly corrosive environments gives type 316L tubes good atmospheric corrosion resistance in polluted marine atmospheres.