Metal powders · W₂C
Hard Facing Tungsten Carbide Grit
Crushed fused W₂C in macro-grit mesh cuts from 30/40 to 100/120, for overlay deposits on mining, oil-field and agricultural tooling.
About Tungsten carbide grit
Hard facing grit is crushed fused tungsten carbide screened into narrow macro-grit bands rather than the wide mesh ranges used for matrix powders. The narrow band matters: in an overlay deposit, a consistent particle size gives a predictable density of carbide at the wear face, and predictable is what lets a repair shop quote a service life.
At roughly 3000 HV Vickers, the particles are several times harder than the hardened steel they protect and harder than most of the mineral phases that abrade it. Wear proceeds by the matrix eroding back until particles are exposed, then by those particles taking the abrasion until they are undercut and shed. Overlay life is therefore set by the balance between grit size, grit loading and matrix wear rate.
Carbon runs 3.5–4.1% with free carbon max. 0.003%, and apparent density 5.5–6.0 g/cc, consistent with the fused carbide it is crushed from.
Specifications
| Form | Blackish grey crushed grit |
|---|---|
| Mesh sizes (to order) | 30/40, 40/60, 60/80, 100/120 |
| Apparent density | 5.5 – 6.0 g/cc |
| Total carbon | 3.5 – 4.1 % |
| Free carbon, max. | 0.003 % |
| Vickers hardness (approx.) | ~3 000 HV |
Specifications can be tailored to order. Confirm your target values with us before placing an order and we will state honestly whether they are achievable.
Matching grit size to the wear mechanism
Coarse grit resists gouging by large, blocky abrasives; fine grit resists the polishing wear caused by fine slurries. Choosing by abrasive particle size rather than by deposit thickness is the more reliable rule.
30/40 mesh
Severe gouging abrasion — mining drill bits, rock-contact tooling, large blocky abrasives.
40/60 mesh
General heavy hard-facing on oil-field stabilisers and cone bits.
60/80 mesh
Wear-plate cladding and mixed abrasion service.
100/120 mesh
Fine slurry erosion and thinner overlay deposits needing a smoother wear face.
Applications
OAW hard-facing overlays
Oxy-acetylene deposited tube-rod overlays remain the workhorse for field repair. The lower heat input compared with arc processes leaves more carbide intact in the deposit rather than dissolved into the weld pool.
Mining drill bits and cones
Grit overlays on gauge rows and cone surfaces hold bit diameter against abrasive rock, which is what determines whether a hole stays in gauge and how often bits are pulled.
Oil-field stabilisers and bit bodies
Stabiliser blades and PDC bit bodies carry grit overlays to survive the abrasive annular flow. Failure here is expensive in rig time, so consistency of the grit band is worth more than its nominal size.
Agricultural tillage tools
Points, shares and sweeps working in sandy or stony soils. Grit overlay can multiply the service life of a wearing edge several times over at modest cost per part.
Quality control
- Screen analysis confirming the ordered macro-grit band
- Total and free carbon determination
- Apparent density
- Hardness verification against the approximately 3000 HV standard
- Certificate of analysis with every shipment
Manufactured under an ISO 9001:2015 certified quality management system.
Packaging and export
Screened to the ordered macro-grit band and packed in sealed pails or drums, palletised for container shipment, with the screen analysis stated on the certificate of analysis.
Commercial invoice, packing list, certificate of analysis and certificate of origin are supplied as standard with every export shipment.
Tungsten carbide grit — frequently asked questions
What mesh bands do you supply?
Standard macro-grit cuts of 30/40, 40/60, 60/80 and 100/120 mesh. Other bands can be screened to order for larger volumes.
How do I choose between grit sizes?
Match the grit to the abrasive rather than to the deposit. Large blocky abrasives that gouge call for 30/40; fine slurries that polish call for 100/120. Most general mining and oil-field overlay work sits at 40/60.
How hard is the grit?
Approximately 3000 HV Vickers — several times the hardness of the hardened steel substrate it protects, and harder than most abrasive mineral phases it will meet in service.
Does the welding process affect performance?
Considerably. Higher heat input dissolves more carbide into the weld pool, leaving less intact grit at the wear face. This is why oxy-acetylene deposition is still preferred for many hard-facing repairs despite being slower than arc processes.
Tungsten carbide grit export destinations
Country-specific specifications, logistics and compliance notes for this product: