904L super austenitic stainless steel is low carbon high nickel and molybdenum austenitic stainless steel.It has good
activity-passivation conversion ability and excellent corrosion resistance. It has good corrosion resistance in non-oxidizing
acids such as sulfuric acid, acetic acid, formic acid and phosphoric acid, good pitting resistance in neutral chlorine-containing medium, and good crack corrosion resistance and stress corrosion resistance.Suitable for all kinds of sulfuric acid under 70℃, under the pressure of any concentration, any temperature of acetic acid and acid and acetic acid mixed acid corrosion resistanc is also very good. Super austenitic stainless steel 904L(00cr20ni25mo4.5cu;UNS: N08904;EN:1.4539) is a high alloy austenitic stainless steel with low carbon content, excellent corrosion resistance in dilute sulfuric acid and designed for environments with harsh corrosion conditions.Has the high chromium content and plenty of nickel content, the addition of copper makes it have strong ability to resist acid, especially for chloride clearance corrosion and stress corrosion cracking are highly resistant, not easy to appear,erosion and fracture pitting resistance slightly better than other steel grade, good machinability and weldability, can be used for pressure vessels.