Inconel 718(UNS N07718/W.Nr.2.2668)
Avalable products:Seamless pipe,steel Bar,fittings
Standard:ASTM B637
Inconel 718
Inconel 718 is a precipitation-hardenable nickel-chromium alloy containing significant amounts of iron, niobium, and molybdenum along with lesser amounts of aluminum and titanium. It combines corrosion resistance and high strength with outstanding weldability, including resistance to postweld cracking. It is a Nickel-Chromium alloy being precipitation hardenable and having high creep-rupture strength at high temperatures to about 700°C (1290°F). It has higher strength than Inconel X-750 and better mechanical properties at lower temperatures than Nimonic 90 and Inconel X-750.
Inconel 718 Chemical composition:
Alloy
%
Ni
Cr
Fe
Mo
Nb
Co
C
Mn
Si
S
Cu
Al
Ti
GH4169
Min
50
17
Bal
2.8
4.75
0.20
0.65
Max
55
21
3.3
5.50
1.0
0.08
0.35
0.35
0.015
.0.3
0.8
1.15
Inconel 718 Physical propertiesDensity8.2 g/cm³Melting point1260-1340
Inconel 718 Alloy minimum mechanical properties in the room temperature Alloy stateTensile strengthRm N/mm²Yield strengthR P0. 2N/mm²ElongationA 5 %Brinell hardnessHB71896555030≤363Inconel 718 Characteristic:
Good mechanical properties – tensile, fatigue and creep-rupture Yield tensile strength, creep, and rupture strength properties are exceedingly high Highly resistant to chloride and sulfide stress corrosion cracking Resistant to aqueous corrosion and chloride ion stress corrosion cracking High temperature resistant Age-hardenable with a unique property of slow aging response that permits heating and cooling during annealing without the danger of cracking. Excellent welding characteristics, resistant to postweld age cracking Inconel 718 Application fieldChemical processing Aerospace Liquid fuel rocket motor components Pollution-control equipment Nuclear reactors Cryogenic storage tanks Valves, fasteners, springs, mandrels, tubing hangers Well head completion equipment and blow out preventers (BOP’s) Gas turbine engine parts
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