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stainless steel alloy 904L
May 03, 2017

Stainless steel alloy 904L (Wst.1.4539)

Austenitic stainless steel intended for use under severe corrosion conditions, with a very good resistance to attacks in acidic environments, as sulphuric, phosphoric and acetic acid. Very good resistance to pitting corrosion, stress corrosion cracking and a much better resistance to crevice corrosion than steels of alloy 304L and alloy 316L. 

stainless steel alloy 904L Used for chemical processing, pollution control equipment, oil and gas well piping, heat exchangers, acid production and

pickling equipment.


Alloy 904L Limiting chemical composition:

%  Ni     Cr     Mo     Cu     Mn    Si   S    C    N

  Max.    Max.   Max.    Max.   Max.   Max. Max. Max. Max. 

23.0-28.0 19.0-23.0 4.0-5.0  1.0-2.0  2.00  1.00  0.035 0.020  0.10



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