Material No.: 2.4856

EN symbol (short)NiCr22Mo9Nb
Alloy 625
UNSN 06625
AFNORNC 22DNb
Registered work's labelInconel® 625
excellent resistance against corrosion in various corrosive substances (phosphoric/nitric/sulfuric/hydrochloric acid)
also resistant to chloride induced tensile corrosion
resistant against alkalics and organic acids
excellent resistance against fissures, crevice/intercrystalline corrosion

Hauptanwendungsgebiete

Chemical IndustrySuperphosphoranlagen; Abfackelrohre (lösungsgeglühte Variante)
Flue gas desulphurisation plantsflue gas scrubbers
waste incineration plantsKesselrohre (lösungsgeglühte Variante)
Apparatus engineeringpressure tanks
Environmental technologysewage works
offshore plantsSea water desalination plant
NasskorrosionshinweiseSchwefesäure sehr gut ( x) ;gut( );mässig ( )
NasskorrosionshinweisePhosphorsäure sehr gut ( X) ;gut( );mässig ( )

Beschreibung

Densitylb/in.30,303
HardnessHB<=240)
CompositionNickel Chrome Molybdenum alloy
CategoryHeat resistant steels and alloys
Corrosionresistant to intercrystalline corrosion
against crevice corrosion
good resistance to tensile corrosion
high resistance to corrosion in oxidising and chloric substances
Additional characteristicsgood mechanical properties from low to high temperature ranges
excellent resistance against chloride acidic substances

Temperaturhinweise

Application area
Operation temperature ºF  to 1832 ºF 
Explanation reportmax. in air

Chemische Zusammensetzung

Min % Max %
C0,10
Si0,50
Mn0,50
P0,02
S0,015
Cr20,0023,00
Mo8,0010,00
Ni58,00
Cu0,50
Nb3,154,15
Ti0,40
Fe5,00
Co1.00
Al0,40