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Duaplate - The Chromium Carbide Solution

Duaplate is a well established chromium carbide overlay plate, well known for its high abrasion and impact resistance. Duaplate is chromium carbide composite cladding that is fusion bonded to a backing material. Duaplate is renowned for being one of the most abrasive resistant surfaces available.

Duaplate is available in four different grades to suit a range of operating conditions:

  • D60 - Suited for applications involving high abrasion and medium impact.
  • D80 - Suited for applications involving high abrasion and high impact.
  • D90 - Suited for applications involving severe sliding abrasion or fine particle abrasion with low impact.
  • D100 - Suited for applications requiring severe abrasion resistance at elevated temperatures up to 800oC.
  • Duaplate Polished - is available in all grades and thicknesses, the “Polished” surface finish will enhance flow characteristics of sticky ore.

The standard backing material for Duaplate is mild steel. The backing plate acts as a ductile base, which allows Duaplate to be formed and shaped without damage to the overlay material.
The backing plate can also be used for structural support, allowing entire hoppers and chutes to be created using only Duaplate.

Duaplate has been proven to outlast quench and tempered steel in high abrasion and impact applications.

Duaplate Grade
Wear Life Relative to
400HB Q&T Steel
Duaplate D60
5.8
Duaplate D80
6.5


Duaplate is a premium quality product. It is manufactured under tightly controlled parameters within a quality management system. Bradken has always been considered at the forefront of supplying quality, abrasion resistant products to the market place.

Duaplate D60

The D60 overlay material is an austenitic chromium carbide iron that is based on AS2576-2355. The microstructure consists of primary M7C3 carbides in a carbide austenite eutectic matrix. The high abrasion resistance is provided by the hard chromium carbides that protect the matrix from abrasive wear.

Duaplate D60 is suited for applications involving high abrasion and medium impact.

Duaplate D60

Typical uses include:

  • Grizzly bars
  • Crusher main frame liners
  • Chute liners
  • Bin and hopper liners
  • Slurry pipes and bends
  • Sugar harvesting equipment

Duaplate C60

The C60 overlay is a standard grade austenitic chromium carbide iron that is based on AS2576.

Duaplate C60 is specially formulated to meet the demands of the Coal, Quarry and Fabrication industries.
Duaplate C60 is suited for applications involving medium abrasion and high impact.

Duaplate C60

Typical uses include:

  • Conveyor hoods, spoons and skirts
  • Dozer blade and truck tray liners
  • Chute liners
  • Bin and hopper liners
  • Feed chutes
  • Screens

Duaplate D80

The D80 overlay material is a complex chromium carbide iron that is based on AS2576-2455. The microstructure of this material consists of primary M7C3 carbides in a complex carbide austenite matrix. The toughness of the material is improved by the formation of nodular complex carbides leading to a reduction in the size of acicular M7C3 type carbides and inter-carbide spacing.

Duaplate D80 is suited for applications involving high abrasion and high impact.

Duaplate D80

Typical uses include:

  • Sizing Screens
  • Deflector Plates
  • Chute liners
  • Bin & hopper liners
  • Screw Feeders

Duaplate D90

The D90 overlay material is a martensitic chromium carbide iron that is based on AS2576-2560. The microstructure of this material consists of primary M7C3 carbides in a carbide martensite eutectic matrix. The material is resistant to fine particle abrasion due to the improved hardness of the matrix.

Duaplate D90 is suited for severe sliding abrasion or fine particle abrasion with low impact.

 Duaplate D90

Typical uses include:

  • Cement chutes
  • Cyclones
  • Fan blades
  • Fan casings
  • Agricultural implements
  • Trommel screen liners
  • Sizing Screens 

Duaplate D100

The D100 overlay materials are complex chromium carbide irons that are based on AS2576-2460. The microstructure of these materials consists of primary M7C3 and MC carbides in a complex carbide austenite matrix. The high temperature abrasion resistance performance is attributable to the presence of refractory elements molybdenum, niobium and tungsten.D100-XP contains a higher amount of refractory elements than D100, which results in a greater resistance to abrasion at high temperatures.

Duaplate D100 is suited for applications requiring severe abrasion resistance at elevated temperatures.

Duaplate D100

Typical uses include:

  • Sizing screens
  • Ducts
  • Sinter bins
  • Chute liners

Working with Duaplate

Forming and Fabrication
The steel backing plate provides Duaplate with structural integrity, thus entire structures can be fabricated from Duaplate, enabling a continuous wear-resistant surface to be produced regardless of the shape and complexity of the fabrication. Bradken has the capabilities to manufacture such structures or to supply cut and formed, ready-to-go wear liners.

Welding
The base material can be welded with standard mild steel or low hydrogen welding consumables with no pre-heating required. However, care should be taken to avoid contacting the overlay material.

Cutting
Plasma cutting is the recommended method for cutting Duaplate. It is preferable to cut Duaplate from the backing plate side to ensure a clean edge and to prevent carbide
contamination.

Attachment Methods

  • Duaplate can be fabricated with studs welded to mild steel side of wear plate (M12, M16, M20 and M24)
  • Duaplate can be fabricated with countersunk holes to suit bolts (M12, M16, M20 and M24)
  • Duaplate can be supplied with holes ready cut for plug welding

 
Plate Type
Nominal Wear
Thickness (mm)
Nominal Backing
Thickness (mm)
Estimated
Mass (kg/m2)
Sheet Size (mm)
6 on 4
6
4
79
D60, C60, D80
2667x1125
 
D60, D80
3100x2000
 6 on 6
 6
 6
 94
 
 6 on 8
 6
 8
 110
 
 6 on 10
 6
 10
 126
 
 6 on 12
 6
 12
 141
 
 9 on 8
 9
 8
 133
D60, D80
2667x1092
D60, D80
1940x2870
2360x2870
3600x2870
D60, D80
1613x3100
3100x2000
 9 on 10
 9
 10
 149
 9 on 12
 9
 12
 165
 12 on 8
 12
 8
 157
 12 on 10
 12
 10
 173
 12 on 12
 12
 12
 188
 17 on 10
 17
 10
 212
 
 17 on 12
 17
 12
 228
 
 20 on 10
 20
 10
 236
 
 
 20 on 12
 20
 12
 251
 
 
 25 on 10
 25
 10
 275
 
 
 
 
Preferred Size
 Available on Request

 

Duaplate Overlay Direction

 

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