Tribaloy T-800 Alloy

Nominal Composition (Mass %) and Physical Properties

Co Cr Mo C Si Others Hardness Density Melting Range
Base 17.5 28.5 <0.08 3.4 Ni, Fe 54-62 HRC 8.6 g/cm3
0.312 lb/in3

Tribaloy T-800

Tribaloy cobalt-based alloys consist of a hard, intermetallic (Laves) phase dispersed in a softer matrix of eutectic or solid solution. They exhibit outstanding resistance to wear and galling, high corrosion resistance and are particularly suitable where lubrication is a problem. Wear resistance of Tribaloy alloys is highly dependent on the volume percentage of the Laves phase.

Tribaloy T-800 alloy contains hard intermetallic phases of Mo and Si which give the alloy excellent wear properties over a wide temperature range. T-800 was designed to resist high-temperature wear and abrasion and has exceptional oxidation and corrosion resistance due to its high chromium content. T-800 is harder and more resistant to abrasive wear, corrosion, and oxidation than Tribaloy T-400. T-800 exhibits outstanding resistance to galling and is particularly suitable where lubrication is a problem.

Tribaloy T-800 has been used in a wide range of applications, most notably as a wear surface in aircraft engines. Other applications include galvanizing roll bushings, cams, retainer rings, diesel piston rings, mechanical seals, bearing seats, valve trim and pump components.

Areas of application where Tribaloy alloys are used:

  • Metal-to-metal wear
  • Surfaces that cannot be lubricated (e.g. high temperatures)
  • Lubrication starvation
  • Fluid lubricant is of low viscosity
  • Both wear and corrosion are factors


Micrograph of T-800 Casting 500X
Micrograph of T-800 As Deposited 500x
B50TF193 Solid Weld Rod
B50TF190 Powder


Tribaloy T-800 Alloy Data Sheet

Check out our Tribaloy T-800 Alloy data sheet for additional information.

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