Cars × Superalloy Metallurgy
Spinning at 135,000 RPM in 1,900°F Heat: The Metallurgy Inside a Turbocharger Turbine Wheel
Marcus Thorne · July 6, 2026
A turbocharger turbine wheel is roughly the size of a fist, weighs less than a pound, and rotates at speeds exceeding 130,000 RPM while bathed in exhaust gas above 1,700°F. Every production turbine wheel is cast from a nickel superalloy borrowed from jet engines. From Inconel 713C in daily drivers to Mar-M alloys in the Corvette ZR1's LT7, the invisible science of gamma-prime precipitation hardening keeps boost alive.