Metco 68F-NS-1 Cobalt Molybdenum Chromium Silicon (Tribaloy) Alloy Powder

Alternative and trade names
similar to Tribaloy T-800 (Tribaloy is a registered trademark of Kennametal Inc.), Diamalloy 3001, Metco 4800
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Description

Metco 68F-NS-1 is a cobalt alloy containing molybdenum, chromium and silicon. Its good coating properties result from the formation of hard precipitates (cobalt-molybdenum-silicon based intermetallic Laves phases) that are dispersed in a softer cobalt-based alloy matrix. The alloy has a composition similar to Tribaloy T-800. It differs metallurgically from typical cobalt-chromium-tungsten alloys that are hard because of carbides within their structures.


The coatings exhibit unique corrosion resistance, oxidation resistance, excellent abrasive wear resistance and high service temperature capability with good hot hardness. Coatings exhibit a low coefficient of friction particularly suitable where lubrication is low or non-existent.


Metco products are sized for plasma spray. Coating properties depend strongly on the volume percentage of Laves phases. Subsequent heat treatment (annealing) at high temperature improves coating properties substantially.


Discover Metco 68F-NS-1 online at myMetco. View current product pricing and availability.

Properties

General

Density

ρ

5.1 g/cm³ at 20 °C

apparent density

Particle size range

drange

10 - 45 µm

Thermal

Max service temperature

Tmax

980 °C

Melting point

Tm

1230 - 1600 °C

Chemical properties

Element

Weight %

Comment

Co

-

balance

Mo

28.5 %

Cr

17.5 %

Si

3.4 %

Technological properties

Application areas

Coatings are hard with good corrosion resistance in acidic media and good oxidation resistance in air up to relatively high temperatures. Coatings exhibit excellent galling and wear resistance and even resist fretting with inadequate lubrication. Excellent tribological performance when rubbing against itself, stainless steel, gray cast iron, aluminum, superalloys and hard chromium plated surfaces. Applications include pump components, gas turbine applications to combat fretting, landing gears, ball and roller bearings, sleeve bearings, journal bearings, piston rings, camshafts, high and low pressure nozzles, valve seats, valve faces and exhaust fan blades.

Availability

Stock

Chemical composition

CoMoCrSi

Distribution

Global

Handling recommendations

Store in the original container in a dry location; Open containers should be stored in a drying oven below 38°C (100 °F) to prevent moisture pickup; Tumble contents prior to use to prevent segregation.

Morphology

Spheroidal

Order number

1000568

Other

For oxidation temperatures, up to 980 °C (1800 °F) Metco 68F-NS-1 is one of the best choices because of its high chromium content. All of the Cobalt Molybdenum Chromium Silicon Tribaloy Alloy Powders offer good corrosion resistance in most acidic and saline environments; however, for the best corrosion resistance in these environments with better as-sprayed wear resistance, choose Metco 4800, Diamalloy 3001 or Metco 68F-NS-1.

Packaging size

5 lb (approx. 2.25 kg)

Processing history

Gas Atomized

Processing methods

Atmospheric Plasma Spray

Safety data sheet

www.oerlikon.com/metco SDS No. 50-320

This material data has been provided by Metco.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.