Kooben composite wear-resistant steel plates

Kooben Technology USA – Wear plates 101

In the 1960s, the United States, Britain, Germany and other countries began developing and manufacturing composite wear-resistant steel plates (also known as wear plates). The world’s first composite wear-resistant steel plate was manufactured by TAPCO Corporation in the United States using surfacing technology. By studying foreign technologies, Beijing University of Technology had realized Chinese development of technology used to manufacture Composite wear-resistant steel plates in 1987. We then manufactured China’s first commercialized composite wear-resistant steel plates in 1991 by working with the Beijing University of Technology.

Advantages of using composite wear-resistant steel plates

  • Reduction of maintenance costs
  • Reduction of downtime and increased equipment availability
  • Reduction of wear and tear that reduces equipment capacity and increases power consumption
  • Substantial reduction of wear, damage, and flaking that contaminates the environment and leads to high labor costs for clean-up


Wear-resistant layer microstructure

Our third-generation surfacing technology prepares a wear-resistant layer with a thickness of 1/8 to 5/8 inch (3-15 mm). The matrix of the wear layer is composed of eutectic cementite, alloy martensite, and retained austenite. The carbon content of the main component is 4-5%, and the Chromium content is 25-30%. The volume fraction of Cr7C3 carbide in the metallographic structure reaches more than 50%. The dispersed hexagonal carbide, which is the hard phase of the wear-resistant layer, has a hardness of up to 1800 HV.

Mechanical properties

Abrasive wear testing

The hardness of the wear-resistant layer of the composite wear-resistant steel plate was shown to be greater than 60 HRC by independent laboratory testing. Experimental data show that the wear resistance of our composite wear-resistant steel plate is 20-25 times that of low carbon steel, 10-12 times that of 16Mn steel, and 5-8 times that of high manganese steel.

The substrate of our composite wear-resistant steel plates is a tough low-carbon steel (such as Q235). During use, the wear-resistant layer resists abrasion of the wear medium, and the substrate bears the load of the medium. Therefore, our composite wear-resistant steel plates have good impact resistance. They can be used in high drop impact and wear situations, such as hoppers for conveyor systems.


The wear-resistant layer and the substrate are metallurgically bonded. This bond is strong and prevents peeling.

Heat resistance

The wear plate is made of alloys, so it has a maximum working temperature of 400°C or less. If you need to resist higher temperatures, Kooben Technology USA can customize the composition of the hardfaced layer to meet your requirements.

Corrosion resistance

The wear layer contains a high percentage of chromium, which has the properties of chromium stainless steel and can protect products susceptible to corrosion.


Our composite wear-resistant steel plates can be cut, bent, holed, welded, and plug welded. Other types of machining are also possible.

Kooben Technology USA – Wear plates 116


The entire composite wear-resistant steel plate can be cut using a plasma cutter to produce the desired shape and size.


Plasma cutters can be used to make holes in composite wear-resistant steel plates. Manual plasma cutting and numerical control plasma cutting can be used; the method chosen should be appropriate for the user’s precision requirements.


Multiple sheets of composite wear-resistant steel plate substrate can be welded together to increase area. Composite wear plates can also be flat.

Our composite wear-resistant steel plates can be connected with other workpieces using welding, face welding or back welding bolts. They are suitable for on-site construction.


Through cold forming, the composite wear-resistant steel plates can be bent into the desired arc or cylinder.

Wear plate images


The thickness of the substrate and wear layer can be adjusted according to customers’ operating conditions and requirements.

GradeSubstrate thickness (mm)Wear-resistant layer thickness (mm)Hardness (HRC)Plate dimensions: ft (mm)
KB6+464<605x20 (1500 x 6000)
KB10+10+101010 (double-sided)

Typical applications

Cement industryMill feedersFan blades and linersCrusher beams and liningsExcavator buckets
Mill linersPump casingWhirlwind dust collectorsScrew conveyors
HoppersPowder separator blades and linersChutesLiners
Power industryCoal mill barrel linersFan impeller shellsDust collector inlet fluesAsh conduit
Bucket wheels and linersSeparators and connecting pipesCoal lining boardsBurner fronts
Fuel falling coal and funnelsAir preheater bracketsSeparator bladesCoal pipeline liners
Coal industryShearer drumsShearer shoesChute linersSpiral chutes
Coal falling bucketsBunker wallsSieve plates and screensScraper conveyors
Other industriesGlass factory material mixing systemsConcrete mixing plantsBrick factory moldsCoking plant conveyor chutes
Port material handling systemsMine dump truck linersShip unloader grabsThree links and elbows