Stellite 31 Alloy

Stellite 31 is a cobalt-base, high-temperature superalloy having high tensile and creep properties. It is superior in stress-rupture properties to many alloys commercially available, especially at 1700°F (926°C) and 1800°F (980°C). Stellite 31 is resistant to oxidizing and reducing atmospheres up to 2100°F (1150°C). It has excellent resistance to thermal and mechanical shock. Due to its high-temperature properties, Stelllite 31 is often used in gas turbine engines in areas subject to hot gas erosion, as well as furnace working tools that require a combination of mechanical integrity and hot wear resistance.

Nominal Composition
Base: Co
Cr: 26
W: 7.5
C: 0.5
Ni: 10.5
Others: Mo, Fe, Si

Hardness HRC: 25-35

Typical UTS: 740 MPa

UNS: R30031

AMS: 5382