... Introduction about superalloy: Superalloys are important metal materials used for hot end parts of modern aerospace turbines, high temperature parts of ... , GH151, GH118, GH220, K417, K419 etc. Product of ATM for example:718Nickel alloy precipitation hardened by gamma prime and double ... Readily fabricated, weldable even in the hardened condition. Used for gas turbine components to 1200°F, as well as ...