Engineered Surfaces for Exceptional Performance
Engineered Surfaces for Exceptional Performance

Metal Spray Flexicord

Article Index

Page 6 of 7

Carbide Series

MSSA carbide series of thermal spray Flexicord materials produce high performance tungsten carbide or chromium carbide coatings. These coatings provide resistance to abrasion, erosion, fretting & sliding wear comparable to those produced by costlier HVOF methods.

Compared to HVOF or plasma sprayed coatings, the carbide series Flexicord products yield coatings with less internal stress which permits thicker coatings & better resistance to thermal cycling. The coatings can be used as sprayed – with roughness values from 4 – 6.5 μm – or can be finished with diamond or AZ grinding.

HardKarb 12 Co Thermal Spray Flexicord

Features & Benefits

  • Produces hard, dense coatings.
  • Excellent resistance to abrasion, erosion, fretting & sliding wear.
  • Maximum temperature: 500°C (932°F).
  • Not suitable for severe corrosive or oxidizing environments.
  • Ideal coating for paper rolls, wire drawing equipment, fan & compressor blades, pump seals & housings.
  • Protects against coal dust, non-corrosive slurry & sand.

Physical Properties

Composition Coating Hardness ASTM G65 Volume Loss Coating Density Coating Porosity Pore Diameter Coating Roughness
WC – 88%
Co – 12%		 1050 – 1200 Hv300

1.8 mm3 

13.7 g/cm3 (0.13 lb/in3)

 3 - 7% 5 – 10 µm 4.5 - 6.5 µm Ra

HardKarb 15 HC Thermal Spray Flexicord

Features & Benefits

  • Produces hard, dense coatings.
  • Excellent resistance to abrasion, erosion, fretting & sliding wear.
  • Excellent corrosion resistance in seawater, diluted mineral and hydrocarbon environments.
  • Not suitable for severe corrosive or oxidizing environments.
  • Ideal for marine environments, petrochemical & off-shore applications.

Physical Properties

Composition Coating Hardness ASTM G65 Volume Loss Coating Density Coating Porosity Pore Diameter Coating Roughness
WC – 85%
Ni – 10%
Cr – 2.75%
Mo – 2.75%
Fe – 1.15%
Co – 0.45%		 1000 – 1100 Hv300

3.4 mm3 

13.3 g/cm3 (0.48 lb/in3)

 3 - 5% 5 – 15 µm 4.5 - 6.5 µm Ra

HardKarb CoCr Thermal Spray Flexicord

Features & Benefits

  • Dense coating with excellent resistance to abrasion, erosion, cavitation & sliding wear.
  • Better corrosion & abrasion resistance than HardKarb 12 Co.
  • Ideal for wet corrosive environments & water-based solution applications.
  • Recommended for pump sleeves, bushings, mud pump shafts, paper rolls, gate & ball valves, hydraulic cylinders & compressor shafts.
  • Maximum temperature: 500°C (932°F).
  • Hard Chrome replacement.

Physical Properties

Composition Coating Hardness ASTM G65 Volume Loss Coating Density Coating Porosity Pore Diameter Coating Roughness
WC – 85%
Co – 10%
Cr – 4%		 700 - 1250 Hv300

1.6 mm3 

13.3 g/cm3 (0.48 lb/in3)

 3 - 4% 5 – 10 µm 4.5 - 6.5 µm Ra

ChromKarb Thermal Spray Flexicord (Cr3C2 25% NiCr) 

Features & Benefits

  • Higher operating temperature than other HardKarb formula – up to 870°C (1598°F).
  • Suitable for aluminum substrates.
  • Dense coating with excellent oxidation, cavitation & erosion resistance.
  • Hot gas corrosion resistance, especially in sulfurous gases.
  • Can be sealed to improve corrosion resistance.
  • Recommended for hydraulic valves, fuel rod mandrels, tooling, machine parts, boiler tubes, WTE incinerators & hot forming dies.

Physical Properties

Composition Coating Hardness ASTM G65 Volume Loss Coating Density Coating Porosity Pore Diameter Coating Roughness
Cr3C2 – 75%
NiCr – 25%		 900 Hv300

8.9 mm3 

7.1 g/cm3 (0.26 lb/in3)

 2 - 4% 5 – 10 µm 5.5 - 6 µm Ra