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METCO ^® 36C

Metco 36C is a blend of large tungsten carbide particles in a nickel-chromium, self-fluxing alloy powder. Coatings of Metco 36C are more wear resistant than any other Metco fused coating.

Tests show the abrasive wear resistance of Metco 36C coatings is 1.5 times that of Metco 32C coatings, even though 36C contains a smaller percentage of tungsten carbide.

The tungsten carbide used in 32C is in the form of WC-12% Cobalt aggregate and, therefore, some of the WC tends to go into solution with the cobalt when the coating is fused, thus losing some of its extreme hardness. On the other hand, the tungsten carbide particles in 36C are large, blocky and unaffected by the heat of fusing. Thus, they form a harder, more continuous surface in the coating, which resists wear much longer.

Metco 36C should be used for all applications where a premium wear resistant coating is required. It is highly resistant to wear by abrasive grains, hard surfaces, fretting and particle erosion, all at temperatures up to 540ºC (1000ºF).

Typical Composition:

• Tungsten Carbide-8% Nickel Composite 35%
• Chromium 11.0%
• Boron 2.5%
• Iron 2.5%
• Silicon 2.5%
• Carbon 0.5%
• Nickel Balance

Coating Properties

• Texture, as-fused (microinches aa): 80-150 (microns aa): 2-4
• Macrohardness, Matrix, fused: Rc58-60
• Tungsten Carbide particles: Rc75 equivalent
• Tungsten Carbide particles KHN502000
• Density (g/cc): 8.3
• Porosity (volume %): Essentially none
• Bonding Strength: Metallurgical

Wear Resistance

Metco 36C coatings exhibit 1.5 times the wear resistance of Metco 32C coatings. Wear tests conducted using an abrasive slurry of water and aluminum oxide.

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