904L (1.4539) Stainless Steel

904L stainless steel is one of the best stainless steel grade for corrosion resistance. This grade is written as 1.4539 or X1NiCrMoCu25-20-5 according to EN norm and it is written as UNS S08904 according to UNS norm. 904L stainless grade contains very high level of nickel, molibdenium, chromium and combinations of all these elements makes this stainless steel grade very resistant to corrosion resistance. 904L material is one of the strongest material to corrosion at Bircelik warehouse and if this grade is not enough, then nickel alloys or titanium alloys has to be choosen, because rest of the stainless steel grades will not survive if 904L is not enough. 904L has also a very good anti-magnetic property and for alot of applicatipons, this is another reason to use 904L stainless steel grade. 1.4539 stainless steel has a very low content of carbon and low carbon also improving this grade's corrosion resistance level.


904L stainless is not a very strong stainless steel grade and it does not have strong mechanical properties. 1.4539 is not a cheap stainless steel grade and it is not so easy to machine it. 1.4539 material used in petrochemical industry, paper mills, treatment plants, gas production and filling plants and luxery watch industry.



Grade Properties

General Properties


Corrosion Resistance:
Mechanical Properties:





904L (1.4539) Grade Material Stock List

Material Shape Min Diameter (mm)

Max Diameter (mm)

Round 10 250



904L (1.4539) Chemical Composition

Grade C Mn Si P S Cr Ni Mo Cu
904L (1.4539) %0.02 max %2.0 max %1.0 max %0.045 max %~0.01 min



%4-5 %1.2-2.0



Links About 904L Grade

UGI904L (1.4539) - UGITECH