Hardfacing Wear-resistant Steel
Professional manufacturer of chromium carbide overlay (cco) wear plates – bimetallic hardfacing steel with 35% cr, 5.
Hardfacing Wear-resistant Steel
Professional manufacturer of chromium carbide overlay (cco) wear plates – bimetallic hardfacing steel with 35% cr, 5.5% c for extreme abrasion resistance. hh-700b, hh-850a grades; thicknesses 3-12mm; custom sizes. ideal for mining, cement, power, steel mills – 20x longer life than mild steel.
Chromium Carbide Overlay (CCO) wear plates are bimetallic composite plates produced by automatic open-arc welding of high-chromium carbide flux-cored wire onto a mild steel base (Q235/Q345). The overlay forms a complex carbide matrix (M7C3 carbides >60% volume, hardness 1400-1800 HV) for unmatched abrasion and impact resistance.
No delamination, uniform chemistry, and metallurgical bond ensure reliable performance in harsh environments. Ideal alternative to quenched & tempered wear plates.
C 4.8-5.5%, Cr 23-28%; ≥60 HRC; for general abrasion with medium impact.
C 5.0-6.0%, Cr 35-40%; ≥60 HRC; for severe abrasion in high-wear zones.
| Overlay + Base (mm) | Size (mm) | Cladded Area (m²/sheet) |
|---|---|---|
| 3+3 | 1000×1500 | 1.5 |
| 3+5 / 4+6 / 6+6 | 1480×3041 | 4.5 |
| 8+8 / 10+10 | 1470×3062 | 4.5 |
| 12+12 | 1460×3083 | 4.5 |
Custom thicknesses, widths, and lengths available. Flatness tolerance ±3mm/m.
The overlay surface of CCO plate will consist of a series of beads with numerous hairline cracks in them. These properly spaced crosscheck cracks are a natural phenomenon and are beneficial to the material. The cracks propagate through the overlay and end at the fusion line.
Plasma burning, air arc, abrasive saw or water jet.
Our CCO overlay plate can be joined by welding the substrate to substrate using 309 weld wire/rod.
Using a press brake, forming should be perpendicular to the weld pass direction. Plate rolling should be performed in the directions of the overlay beads.
Overlay plates are versatile and tailored to specific wear challenges. Below are examples across industries.
Used in chutes, hoppers, and conveyor systems in mining or aggregate processing. CCO plates excel here, resisting material flow that erodes surfaces.
Ideal for high-stress areas like bucket lips and crusher liners in quarrying, where deep scratching and tearing occur.
Suitable for hammer mills and moderate-duty crushers. Products like Super-C® handle combined impact and sliding without cracking.
Applied in heavy-duty equipment like dragline buckets in mining, providing toughness against severe blows and abrasion.
In coal-fired power plants or incinerators, borocarbide overlays protect boiler tubes and ash handling equipment from heat and particle erosion.
In corrosive environments like acidic mining slurries or chemical processing, overlays provide dual protection against wear and chemical attack.
For fabrication, these plates can be cut via plasma, water jet, or abrasive saw; welded using compatible rods (e.g., 309 for CCO); and bent perpendicular to weld beads for forming.
