904L is a high-alloy austenitic stainless steel with very high chromium, nickel, molybdenum, and copper content. It offers superior corrosion resistance in highly aggressive environments, especially sulfuric acid.
Key Properties
Corrosion: Exceptional resistance to sulfuric acid, phosphoric acid, and chlorides.
Pitting Resistance: High PREN (Pitting Resistance Equivalent Number) value.
Weldability: Good weldability with standard methods.
Formability: Excellent ductility for deep drawing and forming.
Common Applications
Chemical: Sulfuric acid storage tanks, heat exchangers, and piping.
Pharmaceutical: Reaction vessels and processing equipment.
Marine: Seawater cooling systems and offshore components.
Pollution Control: Flue gas desulfurization equipment.