Super austenitic stainless steel 904L are mainly used in acidic medium. It is very stable  in pure phosphate. It has good anticorrosion to point corrosion, slot corrosion,  intercrystalline corrosion and stress corrosion.
Anticorrosion ability:
Good anticorrodion ability., It has below capability:
1.Good ability to avoid patch and crack
2. Good ability to withstand intercrystalline corrosion
3. High pressure work
4. Normal corrosion
Application
It is widly used in chemical industry by diffierent products. Such as: distillation pole used  to make acetate, purify pole used to make ethyne, pipes used to convey vitriolic,   store pot, facility used in boiler and so on.