Chromium Carbide
Overlay Pipe
Bimetal wear pipe with a chromium carbide overlay deposit fused metallurgically to a structural steel base -- engineered for highly abrasive bulk-material flow in cement, mining, power, and bulk handling systems.
- Diameter
- DN50-DN1200
- Overlay
- 3-25 mm
- Cr Content
- 28-35%
- Wear Life
- 5-10×
- Metallurgically bonded CCO deposit -- no delamination under thermal cycling
- Dense primary chromium carbides (M7C3) distributed across the working face
- Custom diameters, lengths, flanges, and bend configurations on request
- Inspected per ISO 9001 -- spectrography, HRC, and abrasion testing per batch
Built for the most abrasive flow paths in heavy industry.
HALDEN Chromium Carbide Overlay Pipe is manufactured by depositing a high-chromium, high-carbon hardfacing alloy onto the inner or outer surface of a structural steel pipe using open-arc FCAW overlay welding. The result is a bimetal pipe combining the toughness and weldability of mild steel with the extreme abrasion resistance of a chromium carbide composite.
The deposit microstructure is dominated by primary M7C3 chromium carbides (typically 50-60% by volume) embedded in an austenitic matrix -- delivering wear life 5 to 10 times longer than AR400/AR500 steel under sliding abrasion conditions, with a fraction of the maintenance interval.
Pipes can be supplied straight, bent, flanged, lined internally or clad externally, and matched to your existing pipework geometry. HALDEN's free sample service and engineering support team help you specify the correct overlay thickness and base wall for the actual wear mechanism in your plant.
Specifications & Standard Sizes
All standard products are CNC-cut and overlay-welded to drawing tolerance. Non-standard dimensions, alloys, and configurations available on request.
| Element | Range (wt%) | Function |
|---|---|---|
| C | 4.0 - 5.5 | Carbide former |
| Cr | 28 - 35 | Primary M7C3 |
| Mn | 0.8 - 2.0 | Matrix toughness |
| Si | 0.5 - 1.5 | Deoxidizer |
| Mo / Nb / B | Optional | Complex carbides |
| Hardness (overlay) | 58 - 65 HRC |
| Carbide volume | 50 - 60 % |
| ASTM G65 mass loss | ≤ 0.3 g |
| Service temperature | ≤ 600 °C continuous |
| Bond strength | Metallurgical fusion |
| Base material | Q235B / Q345B / ASTM A36 |
Custom sizes, bend angles, and overlay thicknesses are produced to drawing.
| Model | Outer Ø (mm) | Base Wall (mm) | Overlay (mm) | Length (m) | Configuration |
|---|---|---|---|---|---|
| CCO-P-100 | 114 | 8 | 4 + 4 | ≤ 6.0 | Internal lining |
| CCO-P-150 | 168 | 10 | 5 + 5 | ≤ 6.0 | Internal lining |
| CCO-P-200 | 219 | 10 | 6 + 6 | ≤ 6.0 | Internal lining |
| CCO-P-300 | 325 | 12 | 8 + 8 | ≤ 6.0 | Internal / external |
| CCO-P-500 | 530 | 14 | 10 + 10 | ≤ 6.0 | Internal / external |
| CCO-P-800 | 820 | 16 | 12 + 12 | ≤ 6.0 | External overlay |
| CCO-P-1200 | 1220 | 20 | 15 + 15 | ≤ 6.0 | External overlay |
Engineered for service life -- not just data sheets.
Every HALDEN CCO pipe is overlay-welded on our own automated lines and inspected with metallurgical-grade equipment.
True fusion bond between overlay and base -- not glued, bolted, or mechanically clamped. Handles thermal cycling and impact without spalling.
Field-validated against AR400/AR500 in cement raw-meal lines, fly-ash piping, and slurry transfer -- major reduction in shutdowns and re-piping cost.
Bends, elbows, tees, reducers, flanges, grooves, wear-back design -- fabricated to your isometric or 3D drawing.
Drawings, alloy match, and overlay-thickness recommendation returned within 8 working hours -- backed by 17+ years of project experience.
Every batch is verified -- chemistry, hardness, abrasion.
HALDEN does not rely on visual inspection alone. Each production batch of CCO Overlay Pipe is examined using metallurgical-grade testing equipment, and a Mill Test Certificate is issued with every shipment.
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SPECTROMAXMaterials spectrography
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HRCRockwell hardness
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ASTM G65Dry sand / rubber wheel
-
UTUltrasonic hardness
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MicroscopyCarbide morphology
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Handheld XRFOn-site verification
Send us your line drawing.
We'll quote the right CCO pipe.
Include pipe diameter, length, bend angles, media type, particle size, flow velocity, and operating temperature. Our engineering team replies within 8 working hours with overlay-thickness recommendation and pricing.
- Free sample evaluation for qualified projects
- OEM & drawing-based custom fabrication
- Worldwide export -- Europe, Americas, Australia, Asia
- 24/7 after-sale technical support