Standard Tungsten Carbide Cladding Formulas – Plastics

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Engineered Formulas
Conforma Clad has compiled over twenty years of scientific testing to develop three standard tungsten carbide cladding formulas that meet most of your severe wear protection needs. Our standard cladding formulas are designed to protect equipment from multiple modes of wear, including abrasion, erosion, corrosion or any combination of the three. Conforma Clad engineers evaluate individual components and their operating environments in order to recommend a standard cladding formula, or create a custom cladding to meet customer-specific requirements.

Our unique infiltration brazing process combines the hardness of tungsten carbide with the corrosion-resistance of nickel chrome boron, to create a protective barrier with unmatched wear-resistant properties. With a metallurgical bond strength in excess of 70,000 psi, our cladding is extremely resilient to chipping, cracking and flaking.

Cladding Specifications

*Tungsten Carbide (WC) includes cobalt-bonded WC.

Cladding Properties
	WC 200	WC 210	WC 219
Density (lb/in3)	0.44	.042	0.40
Thermal Conductivity (BTU in/h●ft2●°F)	230	200	170
Metallurgical Bond Strength (psi)	>70,000	>70,000	>70,000
Porosity	<3%	<3%	<3%
Rockwell Hardness (HRC)**	64-70	60-66	56-62

**Cladding is a composite of tungsten carbide particles dispersed in a nickel-based alloy matrix. The extremely hard carbide particles, with a Vickers Diamond Pyramid Hardness of about 2000 DPH50g [1865 DPH50g is equivalent to 80 Rockwell C Hardness (HRC)], are surrounded by a two-phase matrix (300-800 DPH50g, equivalent to 30-64 HRC). Because of the heterogeneous structure of the cladding, direct Rockwell hardness measurements are an average of the hard particles and matrix, and are not representative of the individual components of the composite. 

Cladding Photomicrograph

Cladding Dense tungsten carbide loading with uniform carbide distribution - high wear resistance with predictable wear rates and continuous heat transfer.  No interconnected porosity - superior corrosion and impact resistance Bond Line True metallurgical bond (>70,000 psi) with high interparticle bond strength - provides unsurpassed strength and prevents chipping, flaking and check cracking Diffusion Zone Minimal dilution - substrate retains uniform properties in diffusion zone Substrate Heat treatable - can be heat treated after cladding process to restore substrate’s mechanical properties

Performance Data

For most twin-screw extruder barrels, WC 200 is applied to the bores for maximum abrasion resistance and WC 219 is applied only to the apex for increased ductility. In extremely corrosive conditions, WC 219 can be applied to the bores as well.

Cladding Properties