Alloy 718 (2.4668)

Inconel 718 is a nickel-chromium-molybdenum alloy designed to resist a wide range of severely corrosive environments, pitting and crevice corrosion. This nickel alloy is used from cryogenic temperatures up to long term service at 648° C.

	Ni+Co	Cr	Cb+Ta	Mo	Ti	Al	Co	C	Mn	Si	P	S	B	Cu	Fe
Min	50	17	4.75	2.80	0.65	0.20	--	--	--	--	--	--	--	--	--
Max	55	21	5.5	3.3	1.15	0.8	1.00	0.08	0.35	0.35	0.015	0.015	0.006	0.30	Bal.

What are the characteristics of Inconel 718?
• 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


In what applications is Inconel 718 used?
• Chemical 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