Diamalloy 3002NS 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. This alloy has a composition similar to Tribaloy T-400. 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.
Diamalloy products are sized for application using HVOF. Coating properties depend strongly on the volume percentage of Laves phases. Subsequent heat treatment (annealing) at high temperature improves coating properties substantially.
3.3 g/cm³ at 20 °C
Particle size rangedrange
5.5 - 45 µm
Max service temperatureTmax
1230 - 1600 °C
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.
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.
HVOF-applied coatings of Diamalloy 3002NS have higher macrohardness, microhardness, bond strength and apply with higher deposit efficiencies compared to their APS-applied respective counterpart of Metco 66F-NS. Good oxidation resistance, up to 760 °C (1400 °F) in air, can be achieved using Diamalloy 3002NS.
5 lb (approx. 2.25 kg)
Safety data sheet
www.oerlikon.com/metco SDS No. 50-244
This material data has been provided by Metco.