Tribaloy™ T-400/T-400C Alloys
Nominal Composition (Mass %) and Physical Properties
Co | Cr | Mo | C | Si | Others | Hardness | Density | Melting Range | |
T-400 | Base | 8.5 | 28 | <0.08 | 2.5 | Ni, Fe |
51-58 HRC | 8.90 g/cm3 0.325 lb/in3 |
1288-1340ºC 2350-2440ºF |
T-400C | Base | 14 | 27 | <0.08 | 2.6 | Ni, Fe | 48-56 HRC | 8.86 g/cm3 0.320 lb/in3 |
1315-1335ºC 2400-2435ºF |
Tribaloy T-400 and T-400C
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-400 combines excellent mechanical wear resistance with good corrosion resistance. T-400 contains hard intermetallic phases of Mo and Si which give the alloy excellent wear properties over a wide temperature range. T-400 exhibits outstanding resistance to galling. T-400C offers improved oxidation corrosion and high-temperature wear resistance over T-400 as well as improved thermal shock resistance.
T-400 and T-400C are known for their use in automotive turbocharger applications. Other areas of application are in situations where:
- Metal-to-metal wear exists
- Surfaces cannot be lubricated (e.g. high temperatures)
- Lubrication starvation exists
- Fluid lubricant is of low viscosity
- Both wear and corrosion are factors
DESIGNATION | PRODUCT FORM |
UNS R30400 | Castings, Powder Metallurgy, Powder and Rod |