UNS N08904 1.4539 Seamless Stainless Steel Tube Heat Exchanger Grade 904L

UNS N08904, commonly known as 904L, is a low carbon high alloy austenitic stainless steel which is widely used in applications where the corrosion properties of AISI 316L and AISI 317L are not adequate.

The addition of copper to this grade gives it corrosion resistant properties superior to the conventional chrome nickel stainless steels, in particular to sulphuric, phosphoric and acetic acids. However, there is limited use with hydrochloric acids. It also has a high resistance to pitting in chloride solutions, a high resistance to both crevice and stress corrosion cracking. Alloy 904L performs better than other austenitic stainless steels due to the higher alloying of nickel and molybdenum.

The grade is non-magnetic in all conditions and has excellent formability and weldability. The austenitic structure also gives this grade excellent toughness, even down to cryogenic temperatures.

The high chromium content promotes and maintains a passive film which protects the material in many corrosive environments.904L has a greater resistance to precipitation of ferrite and sigma phases on cooling and welding than other stainless steels containing molybdenum such as 316L and 317L. There is no risk of intercrystalline corrosion on cooling or welding due to the low carbon content. Its maximum service temperature is at 450°C.

Applications:

Seawater cooling equipment

Chemical processing for sulphuric, phosphoric and acetic acids

Gas washing

Production and transport of sulfuric acid

Metal pickling in sulfuric acid

Production and concentration of phosphoric acid

Use in seawater, brackish water, condensers, heat exchangers and pipe work in general

Paper and allied industries

Gas washing

Chemical and pharmaceutical industries

Specifications:

ASTM A213

ASTM A269

ASTM A312

BS EN 10216 pt.5

Mechanical Properties:

Temper	Annealed
Tensile Rm	71	ksi (min)
Tensile Rm	490	MPa (min)
R.p. 0.2% Yield	32	ksi (min)
R.p. 0.2% Yield	220	MPa (min)
Elongation (2” or 4D gl)	35	Mr. Mr. Will Ma Tel: 86-21-57701837 Contact to this supplier Related Search Heat Exchanger Steel Tube    904l Steel Tube    Seamless Stainless Steel Tube    Stainless Steel Seamless Tube    Tube Heat Exchanger    Heat Exchanger Tube    More>> Find more related products in following catalogs on Hisupplier.com Minerals & Metallurgy >> Metallurgy Machinery × Company Info SpezillaTubeCompanyLimited [China (Mainland)] Business Type:Manufacturer City: Shanghai Province/State: Shanghai Country/Region: China (Mainland) View Contact Details You May Like: prev SS 1.4462 Welded Steel Tube ASTM A928 UN... 8" ASTM Stainless Steel Round Tubes Not ... Ferritic / Martensitic Welded Stainless ... Hydraulic Welded Stainless Steel Tube AS... ASME SA249 Annealed And Pickled Stainles... Heat Treatment Copper Nickel Tube Heat E... OD 19.05 x 1.65MM Admiralty Seamless Bra... Polished Stainless Pipe 240G Sanitary St... 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