High Temperature Alloy Fitting

https://www.nickelalloytubes.com/products/high-temperature-alloy-pipe-tube-fitting.html

High-temperature alloy refers to a class of metal materials based on iron, nickel, and cobalt that can work for a long time at high temperatures above 600 °C and under certain stress. Using high-temp alloy known as "superalloys," the alloy hose fittings are mainly used in aerospace and energy fields.