Mechanical properties : Rm : 950, Rp0,2 : 178, hardness : 207, A% : 30

Chemical composition : Ni 58% , Si 0.5% , Mn 0.5% , Al 0.4% , Fe 5% , Cr 21.5% , Mo 9% , C 0.1% , Nb 3.65% , Ta 3% , Ti 0.4%

Description/applications :

INCONEL nickel-chromium alloy 625 is used for its high strength,
excellent fabricability (including joining), and outstanding
corrosion resistance. Service temperatures
range from cryogenic to 1800°F (982°C).
Strength of INCONEL alloy 625 is derived
from the stiffening effect of molybdenum and niobium
on its nickel-chromium matrix; thus precipitationhardening
treatments are not required. This combination
of elements also is responsible for superior resistance
to a wide range of corrosive environments of
unusual severity as well as to high-temperature effects
such as oxidation and carburization.
The properties of INCONEL alloy 625 that
make it an excellent choice for sea-water applications
are freedom from local attack (pitting and crevice corrosion),
high corrosion-fatigue strength, high tensile
strength, and resistance to chloride-ion stress-corrosion
cracking. It is used as wire rope for mooring cables,
propeller blades for motor patrol gunboats, submarine
auxiliary propulsion motors, submarine quickdisconnect
fittings, exhaust ducts for Navy utility boats,
sheathing for undersea communication cables, submarine
transducer controls, and steam-line bellows. Potential
applications are springs, seals, bellows for submerged
controls, electrical cable connectors, fasteners,
flexure devices, and oceanographic instrument components.

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