Hastelloy C4 is a nickel alloy with outstanding high-temperature stability, high ductility and corrosion resistance. Hastelloy C4 alloy can be forged, hot-upset and impact extruded. Although the alloy tends to work-harden, it can be successfully deep-drawn, spun, press formed or punched. And, C4 alloy is solution heat-treated at 1950ºF (1066ºC) and rapidly quenched.