Stainless steel 904L

904L super austenitic stainless steel is a low carbon, high nickel, molybdenum austenitic stainless acid resistant steel, for the introduction of France's H • S company's proprietary materials. Has the very good activation - passive transition ability, excellent corrosion resistance, non oxidizing acid such as sulfuric acid has good corrosion resistance, acetic acid, formic acid, phosphoric acid, has good resistance to pitting corrosion of chlorine ions in the neutral medium, but also has good resistance to crevice corrosion and stress corrosion resistance. The utility model is suitable for sulfuric acid with various concentrations below 70 DEG C, and has good corrosion resistance at the atmospheric pressure of acetic acid and mixed acid of formic acid and acetic acid at any temperature and any temperature, and has good corrosion resistance.

Cr:19-23%  Ni:23-28%  Mo:4-5%  Cu:1-2% C≤0.02  Mn≤2  Si≤1  P≤0.045  S≤0.035

Applications

1) Petroleum, petrochemical equipment, such as petrochemical equipment in the reactor, etc..

2) Sulfuric acid storage and transportation equipment, such as heat exchangers, etc..

3) power plant flue gas desulfurization device, the main use of the parts are: absorption tower body, flue, door panels, internal parts, spray systems, etc..

4) organic acid treatment system of scrubber and fan.

5) sea water treatment equipment, sea water heat exchanger, paper industry equipment, sulfuric acid, nitric acid equipment, acid making, pharmaceutical industry and other chemical equipment, pressure vessels, food equipment.

6) Pharmaceutical Plants: centrifuges, reactors, etc..

7) plant food: cans of soy sauce, cooking wine, salt, and dressing equipment.

In dilute sulfuric acid, strong corrosive medium is 904L steel.