Nickel Inconel 718 AMS 5663

AMS 5663 is the aerospace material specification for Inconel 718 (UNS N07718) bar, forging and ring supplied in the solution and precipitation (age) heat-treated condition, with additional stress-rupture and notch-rupture requirements.

What distinguishes AMS 5663 from the standard AMS 5662 bar is not the strength level, it too meets a minimum 185 ksi tensile and 150 ksi yield, but the added assurance of elevated-temperature performance. AMS 5663 material is tested to defined stress-rupture life and notch-rupture criteria, confirming that it will carry sustained load at temperature without premature failure. That makes it the specification of choice for creep-and rupture-critical parts: rotating turbine discs and spacers, shafts, high-pressure fasteners, and structural components that operate under stress at elevated temperature.

As with all Inconel 718, the alloy welds readily and resists post-weld strain-age cracking, and its aged density is 0.297 lb/in³ (≈ 8.19 g/cm³). The controlled aging used for AMS 5663 can be tailored toward optimum impact properties or optimum tensile and creep-rupture properties depending on the application.

For general high-strength bar without the added rupture testing, see AMS 5662; for improved rupture ductility in heavy sections through a higher solution temperature, see AMS 5664.

Tech Steel & Materials stocks and supplies AMS 5663 bar, forging and ring to aerospace and defense tolerances, request a quote for certified material cut to your size and quantity.