Alloy 718 - AMS 5662/5663

SSS Super Alloys specialise in the supply of Alloy 718 for aerospace application.

Alloy 718 is a high strength nickel-base alloy initially developed for the aerospace industry and is used in applications requiring high strength to approximately 1400°F (760°C) and oxidation resistance to approximately 1800°F (982°C).

Request a quote

Specifications

  • AMS 5662 P
  • AMS 5663 P
  • AMS 5664
  • ASTM B637 UNS N07718
  • Material may also be supplied to specific customer/OEM specifications, subject to enquiry

About Alloy 718 - AMS 5662/5663

This grade is used in many demanding applications based on its high temperature resistance and superior oxidation and corrosion resistance. Originally developed and used for gas turbines, aircraft engines, fasteners and other high strength applications. It also has excellent potential for cryogenic applications.

High strength Alloy 718 can be obtained via heat treatment to achieve the required properties. AMS 5662 is in the solution annealed condition, usually with a capability test to ensure future compliance to AMS 5663. It is the softest of the Alloy 718 ‘states’ which can sometimes offer a machining benefit to our customers.

The material is then aged after machining to meet the mechanical requirements. AMS 5663 is in the solution treated and aged condition to give high strength tensile properties.

SSS Super Alloys have the knowledge and capability to heat treat material from AMS 5662 to AMS 5663 to meets customers’ demands.

Additionally, SSS Super Alloys have the experience and necessary supply chain to offer Alloy 718 in accordance with AMS 5664 for particular application. 

SSS Super Alloys are experienced in handling specific OEM requirements, with many major specifications adhered to and certificates released in accordance with individual specifications. Please contact for more details.

Applications
  • Gas Turbines -
  • Aircraft Engines -
  • Fasteners -
Technical data
Chemical analysis
Nickel
50.0 min - 55.0 max
Chromium
17.0 min - 21.0 max
Iron**
Balance
Niobium
4.75 min - 5.5 max
Molybdenum
2.8 - 3.3 max
Titanium
0.65 min - 1.15 max
Aluminium
0.2 min - 0.8 max
Carbon
0.08 min
Cobalt
1.00 max
Magnesium
0.35 min
Silicon
0.35 max
Phosphorus
0.015 max
Sulfur
0.015 max
Boron
0.0060 max
Copper
0.3 max
Lead
0.005 max
Selenium
0.00003 max
Bismuth
0.00005 max
Physical properties
Heat Treatment
AMS 5662: Solution annealed between 941-1010°C followed by rapid cooling
AMS 5663: As above plus precipitation hardened at 718°C for 8 hours, furnace cooled to 621°C and hold for total ageing time of 18 hours
Size Range
Bar stock: 12.7mm Dia to 300mm Dia
Mechanical properties
Tensile
180 000 psi Min.
Elongation
6% Min.
Reduction of Area
8% Min.
Reveal Hide

Request a quote

Fill in the form and we will get back to you with a quote, or alternatively contact us using the details below...

Other nickel alloys

We have a range of Nickel alloys that fully demonstrate the abilities that Nickel possesses.