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Weld Over Plate

Duaplate® S3 Weld Overlay

Duaplate S3

Duaplate S3 is a chromium-tungsten carbide weld overlay used in the Fixed Plant industry. The manufacturing process of Duaplate, along with the microstructure and chemical composition, give S3 its superior properties. S3 performs well in high abrasion and high impact wear applications. Large sheets or custom shapes of Duaplate S3 are available and can be formed into complex shapes.


Duaplate is manufactured by welding an abrasion resistant material to a mild steel base. A chromium-tungsten rich powder is fused to the base plate, creating a bi-metallic material with high abrasion resistance whilst still retaining ductility allowing forming and welding. Multiple overlay and backing plate thickness options are available.


Extra alloying elements help to give Duaplate S3 its superior properties. Typical chemical composition is given below:

Carbon 4.4%–7.5%
Silicon <0.9%
Manganese 1.0%–1.6%
Chromium 23%–35%
Tungsten 2%–7%
Iron Balance

An S3 microstructure consists of fine, primary M7C3 carbides surrounded by a eutectic mixture of carbides and austenitic matrix material. The very hard primary carbides form as hexagonal nodules and help to prevent wear of the hardfacing material. The austenitic matrix material provides mechanical support to the primary carbides whilst also helping to absorb impact.

Typical Properties
Bulk Hardness 700 HV30
Carbide Hardness 1100–1600 HV0.3
Volume Fraction of Carbides >37%
Density 7850 kg/m3
Duaplate Manufacturing Process
Duaplate Manufacturing Process
Duaplate S3 Microstructure
Duaplate S3 Microstructure
Duaplate S3 Application
Duaplate S3 Application

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