Material No.: 1.4539

EN symbol (short)X1NiCrMoCu 25 20 5
Alloy 904 L
UNSN 08904
AFNORX1NiCrMoCu 25 20 5 / NF EN 10088-1 ( 06/2005) (FR)
BSX1NiCrMoCu 25 20 5 /BS EN 10088-1 ( 06/2005) (GB)
Usually used in highly corrosive substances.

Hauptanwendungsgebiete

Chemical Industryfor processing sufuric acid (e.g. sulfuric acid coolers)
for processing phosphoric acid
for the production of salt acid
cellulose/paper industry
Flue gas desulphurisation plants
offshore plantsSea water desalination plant
Fertiliser industry

Beschreibung

Densitykg/dm38,05
HardnessHB<= 230
CompositionNickel Chrome Molybdenum steel
CategoryCorrosion resisting steels and alloys
Structureaustenitic
Corrosionresistant to intercrystalline corrosion
high resistance to pitting corrosion, tensile corrosion, crevice corrosion
Additional characteristicschemically resistant

Temperaturhinweise

Application area
Operation temperature ºF  to 662 ºF 

Chemische Zusammensetzung

Min % Max %
C0,02
Mn2,00
P0,030
S0,010
Cr19,0021,00
Mo4,005,00
Si0,70
Ni24,0026,00
Cu1,202,00
N0,150