Typical Microstructure Tribaloy T-400 (500x)

Metal-to-Metal Anti-Galling Performance

Tribaloy alloys are either cobalt or nickel-based and are developed for applications in which extreme wear is combined with a high temperature and a corrosive media. Their high molybdenum content accounts for excellent dry-running properties and can be used at temperatures up to 800 - 1000 °C.

Tribaloy’s are typically used in applications where:

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

Tribaloy alloys are used extensively as hard-phase particles in automotive valve seats and guides as well as for other components in aircraft engines and turbochargers to enhance wear performance at elevated temperatures.

Browse Our Tribaloy Alloys

Tribaloy T-400

Combines excellent mechanical wear resistance with good corrosion resistance. T-400 has excellent wear properties over a wide temperature range. Exhibits outstanding resistance to galling. T-400C offers improved oxidation corrosion and temperature wear resistance. As well as improved thermal shock resistance. 

Nominal Composition
Base: Co
Cr: 8.5
Mo: 28
C: <0.08
Si: 2.5
Others: Ni, Fe

Hardness HRC: 48-58

Typical UTS: 100 ksi

UNS: R30400

AMS: Not Listed

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Tribaloy T-400C

Combines excellent mechanical wear resistance with good corrosion resistance. T-400C has excellent wear properties over a wide temperature range. Exhibits outstanding resistance to galling. T-400C offers improved oxidation corrosion and temperature wear resistance. As well as improved thermal shock resistance. 

Nominal Composition
Base: Co
Cr: 14
Mo: 27
C: <0.08
Si: 2.6
Others: Ni, Fe

Hardness HRC: 48-56

Typical UTS: 95 ksi

UNS: R30400

AMS: Not Listed

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Tribaloy T-800

Excellent wear properties over a wide temperature range. Designed to resist high-temperature wear and abrasion. Exceptional oxidation and corrosion resistance. Outstanding resistance to galling, and particularly suitable where lubrication is a problem.

Nominal Composition
Base: Co
Cr: 17.5
Mo: 28.5
C: <0.08
Si: 3.4
Others: Ni, Fe

Hardness HRC: 54-62

Typical UTS: Not Listed

UNS: Not Listed

AMS: Not Listed

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Tribaloy T-900

Improved crack resistance. Can be PTA welded with a preheat of 500°F. Similar wear resistance to T-800 under low loads, and outperforms T-800 under high loads.

 

Nominal Composition
Base: Co
Cr: 18
Mo: 23
C: <0.08
Si: 2.7
Ni: 16

Hardness HRC: 52-57

Typical UTS: Not Listed

UNS: Not Listed

AMS: Not Listed

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