WC-10Co-4Cr Composition

WC-10Co-4Cr is an internationally recognized cemented carbide coating material consisting primarily of approximately 86 wt.% tungsten carbide (WC), 10 wt.% cobalt (Co) and 4 wt.% chromium (Cr).

The WC hard phase provides extremely high hardness and resistance to abrasive and erosive wear. The cobalt-based binder improves toughness and coating cohesion, while chromium enhances resistance to corrosion and chemically aggressive operating environments.

Excellent Wear and Erosion Resistance

The high WC content provides excellent resistance against abrasion, particle erosion, sliding wear and other severe mechanical wear mechanisms. HVOF/HVAF coatings produced with WC-10Co-4Cr are therefore suitable for components continuously exposed to sand, minerals, slurry, particles and other abrasive media.

Enhanced Corrosion Resistance

Compared with conventional WC-Co materials, the addition of chromium improves corrosion resistance, making WC-10Co-4Cr particularly suitable for components exposed to moisture, salt, chemical media and corrosive industrial environments.

This combination of wear resistance and corrosion resistance makes WC-10Co-4Cr an important coating material for oil & gas, offshore, petrochemical and process-industry components.

High Coating Hardness

Properly processed WC-10Co-4Cr thermal spray coatings can achieve very high hardness, typically around 1100–1300 HV, depending on powder characteristics, spraying parameters and final coating condition.

The resulting hard surface helps extend component service life and reduce maintenance frequency in severe wear applications.

Strong Coating Bonding Performance

When processed using optimized HVOF parameters, WC-10Co-4Cr coatings can achieve high bonding strength to properly prepared substrates. Dense coatings with low porosity can be produced while limiting excessive thermal effects on the base material.

Optimized for HVOF and HVAF Thermal Spray

WC-10Co-4Cr is particularly suitable for:

HVOF (High Velocity Oxygen Fuel)
High particle velocity enables dense, strongly bonded carbide coatings with excellent wear performance.

HVAF (High Velocity Air Fuel)
Lower combustion temperatures can help limit carbide decomposition and oxidation while maintaining high particle velocities.

Plasma Spray
WC-10Co-4Cr may also be processed using appropriately optimized plasma spray parameters where required.

Typical Industrial Applications

Aerospace: turbine and compressor components, sealing surfaces and erosion-resistant component protection.

Oil & Gas: pump components, plungers, valve components, sleeves, sealing surfaces and other parts exposed to combined wear and corrosion.

Mining & Construction Machinery: crusher components, rollers, excavator parts and surfaces subjected to severe abrasive wear.

Paper & Pulp: paper rolls, drying rolls, calender rolls and other surfaces requiring wear resistance and long-term dimensional stability.

Power Generation & Heavy Industry: shafts, sleeves, rollers and mechanical components requiring high-hardness surface protection.

GREENSTONE Material Solutions

GREENSTONE provides WC-10Co-4Cr powder for industrial surface engineering applications with particle-size distributions selected for different thermal spray equipment and coating requirements. Powder specifications can be matched to customer requirements for HVOF, HVAF and related coating processes.