Nickel Alloys

Alloy 718


Nickel Alloy 718 is a precipitation hardening nickel-chromium alloy containing significant amounts of iron, niobium and molybdenum with lesser amounts of aluminium and titanium.

Maintains high strength, good ductility and oxidation resistance up to high temperatures while also having outstanding cryogenic properties. It has outstanding weldability including resistance to post weld cracking.

Typical applications: Downhole tools, choke stems, gate valves, sub-surface safety valves, tubing hangers, wellhead components and fasteners.

Available in dia bar stock up to 650mm dia

(Other forms available on request.)

Colour Code
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Related Specifications

Steel Number UNS ASTM
2.4668 N07718 B637

Typical Chemical Analysis

C Mn P S Si Cr Ni Mo Cu Ti B Al Co Cb+Ta
.08 .35 .015 .015 .35 17-21 50-55 2.8-3.3 .3 .65-1.15 .006 .2-.8 1 4.75-5.5

For further technical information or additional sizes on this product or any other product or service please contact us.


All data provided is for information and guidance only. Information above is not for design purposes and comes without warranty or guarantee with respect to the subject matter or fitness for purpose.