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Help Center6+5mm Cr7C3 Overlay on NM360 Base Plate High Abrasion Resistance Steel Plate
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CCO Wear Plate (Chromium Carbide Overlay Wear Plate) – Maximum Protection for High-Abrasion Environments
CCO Wear Plate is a composite material consisting of a mild steel base plate and a hardfacing chromium carbide alloy layer deposited by automatic open-arc or submerged-arc welding. The chromium carbide hard particles (Cr7C3) formed during the welding process have a microhardness of up to HV1800, delivering exceptional abrasion resistance at a fraction of the cost of solid wear-resistant alloy plates-2.
Key characteristics:
Feature |
Description |
Structure |
Base plate (mild carbon steel) + hardfacing layer (chromium carbide alloy) |
Hardfacing thickness |
3–20 mm (depends on application) |
Base plate thickness |
3–40 mm (Q235B, Q345B, NM400, or as specified) |
Hardness range |
HRC 58-63 on hardfacing surface |
Macrohardness |
HRC 58-65 |
Microhardness |
HV 1600–2000 (Cr7C3 carbides) |
Density |
6.5–7.5 g/cm³ (depending on composition) |
How it works: The hardfacing layer contains a high volume of chromium carbide particles (Cr7C3) that act as microscopic armor against abrasive materials. Meanwhile, the mild steel base provides toughness and impact resistance. This combination delivers 2.5x longer wear life than imported AR400 and 3–5x longer than standard domestic wear plates under identical abrasive conditions-2.
Typical applications: Mining chutes, truck bed liners, excavator buckets, cement plant cyclones, steel plant hoppers, coal handling systems, and any equipment handling abrasive materials (ore, coal, sand, cement, limestone).
Each batch includes EN 10204 3.1 mill test certificate with hardness test results and chemical composition of hardfacing layer. Third-party inspection (SGS, BV, TUV) supported. MOQ: 100 KGS (custom size), trial orders welcome.
Key Specifications (Wear Plate)
Parameter |
Specification / Range |
Remarks |
Product Name |
Chromium Carbide Overlay (CCO) Wear Plate |
Also known as hardfacing wear plate, bimetal wear plate |
Standard |
Custom (per customer drawing) |
No universal ASTM standard; manufactured per customer specification |
Base Plate Material |
Q235B, Q345B, NM360, NM400, NM500, or as specified |
– |
Base Plate Thickness |
3 mm – 40 mm |
6 mm, 8 mm, 10 mm, 12 mm, 16 mm, 20 mm common |
Hardfacing Layer Thickness |
3 mm – 20 mm |
3+3, 4+4, 5+5, 6+4, 6+5, 6+6, 6+8, 8+6, 8+8, 10+6, 10+8, 10+10 mm-2 |
Total Thickness |
6 mm – 60 mm |
Base + overlay |
Hardfacing Type |
Chromium carbide (Cr7C3) |
C content 3-5%, Cr content 29-35%-2 |
Hardness (Hardfacing) |
HRC 58-63 (typical) |
Up to HRC 65 for special grades |
Microhardness |
HV 1600-2000 |
Cr7C3 carbides |
Plate Size (Open-Arc) |
Up to 1400 × 3400 mm |
Custom sizes available |
Plate Size (Submerged-Arc) |
Up to 1400 × 3000 mm / 1400 × 3500 mm / 2100 × 3500 mm-2 |
Custom sizes available |
Surface Pattern |
Stripe pattern (open-arc) or smooth (submerged-arc) |
Smooth CCO available for low-friction applications-4 |
Processing |
Cutting (plasma/waterjet), welding, bending, drilling, punching |
Q1：Do you offer sample orders？
A：Yes, samples are available for quality evaluation. Sample cost is charged but refundable upon bulk order.
Q2：What is your MOQ？
A：Our standard MOQ is 100 kg per specification. For common grades and standard sizes, we accept small batch orders. Mixed orders for different products are also welcome.
Q3：Can you provide custom sizes？
A：Yes, we can produce any length, width, thickness, or diameter based on your drawings. Cutting, slitting, and other processing services are available with tolerance as required.
Q4：What certifications do you provide？
A：Each shipment comes with EN 10204 3.1 mill test certificate (MTC). Third-party inspection reports (SGS/BV/TÜV) can be arranged upon request.
Q5：What is your lead time？
A：7–15 working days for stock items. 20–30 days for custom orders, depending on quantity and specification.
Q6：What surface treatments are available？
A：Various surface treatments are available upon request, including pickled, polished, coated, oiled, or as required.
Q7：What payment terms do you accept？
A：T/T (30% deposit + 70% against BL copy), L/C at sight, Western Union, etc.
Q8：What about packaging for export？
A：Standard seaworthy packaging with waterproof protection, steel straps, corner protectors, and ISPM 15 fumigation certification. Custom packaging is available as required.
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