Nickel-Base Superalloy

ATI 718™ alloy (N07718) is an austenitic nickel-base superalloy which is used in applications requiring high strength to approximately 1400°F (760°C) and oxidation resistance to approximately 1800°F (982°C). In addition, the alloy exhibits excellent tensile and impact strength even at cryogenic temperatures.

High strength at room and elevated temperatures is developed by a precipitation heat treatment at 1325°F (718°C) with cooling and a hold at 1150°F (621°C). The relatively slow response to precipitation hardening permits repair welding of the ATI 718™ alloy even in the aged condition.

The ATI 718™ alloy is usually produced by a double melt practice using consumable electrode remelt procedures to provide homogeneity and extremely clean structures.