904L/N08904/1.4539

Chemical: C:≤0.02, Si:≤1.0,Mn:≤2.0,P:≤0.040,S:≤0.03,Cr:19 to 23,Ni:23 to 28,Mo: 4.0 to 5.0, Cu: 1.0-2.0, N≤0.1

Mechanical properties: tensile strength:≥490Mpa; yield strength:≥215Mpa; elongation: ≥35%

Alloy 904L (UNS N08904) is a super-austenitic stainless steel that is designed for

moderate to high corrosion resistance in a wide range of process environments. The

 combination of high chromium and nickel content, coupled with additions of molybdenum

and copper, assure good to excellent corrosion resistance.

With its highly alloyed chemistry — 25% nickel and 4.5% molybdenum, 904L provides

good chloride stress corrosion cracking resistance, pitting and general corrosion

 resistance superior to 316L and 317L molybdenum enhanced stainless steels.

Alloy 904L was originally developed to withstand environments containing dilute sulfuric acid. It also offers good resistance to other inorganic acids such as hot phosphoric acid as well as most organic acids.

Alloy 904L is easily welded and processed by standard shop fabrication practices.

Application: Air Pollution Control, Metallurgical Processing, Chemical Processing, Oil and Gas Production, Pharmaceutical Industry, Pulp and Paper, Seawater and Brackish Water