Metco® 16C Material Information

Metco® 16C

Metco® 16C is a nickel-based self-fluxing alloy consisting of chromium (Cr) 16%, silicon (Si) 4%, boron (B) 4%, copper (Cu) 3%. Molybdenum (Mo) 3%, iron (Fe) 2.5%, carbon (C) 0.5% and a balance of nickel (Ni). This alloy is designed to be remelted or fused after being applied as a spray coating. The characteristics of this alloy make it especially useful since fusion allows particles to coalesce into a pore-free and dense coating. This type of coating is very useful against damage caused by wear from abrasion, particle erosion, fretting and cavitation.

Due to the remelting characteristics of the alloy, it is easier to form thicker and crack-free coatings up to 3mm (1/8”) or slightly more in thickness. It can also be applied to irregularly shaped surfaces without loss of any properties. Typical coating hardness is in the 60 Hrc range.

Properties of Metco® 16C coatings

  • Thick coatings up to ~3mm (1/8”)
  • Good hardness and strength
  • Excellent resistance to wear, abrasion and erosion from abrasive grains, hard surfaces and erosive particles
  • Good resistance to fretting, corrosion and cavitation damage
  • Extremely low porosity due to excellent fusion of coating particles
  • Less chance of coating cracking
  • Superior resistance to acids and aqueous liquids

Potential Benefits

  • Enhances the service life of the product.
  • Ability to apply coating to odd shapes evenly
  • Offers a good combination of mechanical and metallurgical properties.
  • Thicker coatings can be applied
  • Good corrosion resistance

Disadvantages

  • Can be hard to finish machine or grind
  • Due to fusing operations, parts must be able to withstand high temperatures (1950° F) without degrading

Uses and Applications

  • Used for buffing and polishing fixtures where good abrasive grain resistance is required at low temperature.
  • Used on augers and feed screws for abrasion resistance
  • Applied to forging tools to resist hard surfaces at high-temperature application.
  • Exhaust fans and exhaust valve seats to resist particle erosion at low and high temperatures.
Spray and Fuse Coatings