CarTech Pyrotool alloy 7 is an austenitic precipitation hardenable nickel base alloy designed to display high tensile and yield properties at temperatures up to 1300°F (704°C).

To achieve the best combination of hardness and toughness for tooling applications, CarTech Pyrotool alloy 7 is annealed and solution treated simultaneously at 1750°F (954°C) for one hour, then air cooled. It is then aged at 1325°F (718°C) for eight hours, slow cooled 100°F (38°C) per hour to 1150°F (621°C), held for eight hours and air cooled.

CarTech Pyrotool alloy 7, when aged, attains a hardness of Rockwell C 40/44.

Applications:
Key uses for this grade have been:

High-temperature tooling
Extrusion dies
Forging dies
Rams
Mandrels
Holders
Rings
Dummy blocks
Liners