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Duroxite™-Taking Durability to the Extreme

Duroxite 201

Duroxite 201 is developed for severe wear and impact applications applying specially formulated abrasive materials on Hardox 450 backing plate.

The overlay material is composed of primary chromium-rich carbides and refined multiple-alloy complex carbides dispersed evenly in a ductile eutectic austenite matrix. The additional multi-alloy carbides are harder and finer than the co-existing chromium-rich carbides which interlock between large primary chromium-rich carbides in a matrix. 

Key Benefits

  • Hardox 450 backing withstands plastic deformation better due to its high yield strength flexing back after impact 
  • Provides stronger support due to high hardness and better bonding properties between overlay and base steel
  • Better performance for impact situations than Duroxite 200 at elevated temperatures up to 350° C (660° F), but impact resistance is best at room temperature 

Typical Applications

Duroxite 201 is widely used in many industries including mining, cement and power generation. Some specific applications include:

  • Mining: Screen plates, loader bucket liners, feeding systems for ball mills, loader bucket liners, bucket lip shrouds, bucket side shrouds, chutes, liner plates and skip liners
  • Cement: Cement furnace components, sinter plant parts, fan blades, mixer blades, crews, gyratory mantles, coal and cement pulverizer rolls, raw material crushing components, molding panels
  • Power: Coal discharger chutes

 

Duroxite 201

Duroxite 201

Standard overlay thicknesses 

Standard plate sizes 

 Metric unit

Imperial unit 

Metric unit

Imperial unit

 6 mm on 6 mm  1/4’’ on 1/4’’  1.2 m x 2.4 m
1.5 m x 3.0 m
1.8 m x 3.0 m
 4’ x 8’
5’ x 10’
6’ x 10’
 10 mm on 10 mm  3/8’’ on 3/8’’
 12 mm on 12 mm  1/2’’ on 1/2’
 6 mm on 20 mm  1/4’’ on 3/4’’
 6 mm on 25 mm  1/4’’ on 1’’
 6 mm on 32 mm  1/4’’ on 1-1/4’’

 

Standard plate sizes above are available for all standard overlay thicknesses. Other plate sizes and custom thicknesses can be produced upon request. 

 

Surface Hardness

 

Number of overlay passes 

 Typical surface hardness 1)

 Multiple passes  60 to 65 HRC (700 to 850 HV)

 

1) Surface hardness is measured on machined flat surface just below overlay surface. 

Wear Properties

 

Number of overlay passes 

ASTM G65 – Procedure A weight loss 2) 

 Surface

 75% depth of overlay 3)

 Multiple passes  0.12 g maximum  0.12 g maximum

 

2) ASTM G65 is a standard test measuring sliding abrasion resistance using a dry sand / rubber wheel apparatus. ASTM G65 – Procedure A is the most severe test method.
3) ASTM G65 wear test is conducted at 75% depth of the overlay materials to ensure consistently good wear resistance from top surface through to the depth of 75% of the overlay. 

 

The microstructure of Duroxite 201 contains primary chromium-rich carbides and refined multiple-alloy complex carbides with a typical hardness of 2500 to 3000 HK4) dispersed evenly in a ductile eutectic austenite matrix. The typical volume fraction of primary chromium-rich carbides is maintained between 30 to 40% with 7 to 10% of multi-alloy complex carbides. 

4) HK is the Knoop microhardness used primarily for very brittle materials or thin sheets.

Duroxite 211 microstructure

Thickness

Overall and overlay thickness tolerances can be guaranteed within ±10% of specified thickness.

Flatness

Plate flatness tolerance can be guaranteed within ±3 mm (±1/8”) over 1.5 m (5’) plate length for plate dimensions equal to or less than 1.5 m (5’) x 3.0 m (10’). For plates greater than 1.5 m (5’) wide by 3.0 m (10’) long, the following flatness guarantees apply.

Standard overlay thicknesses 

 Flatness tolerance

 Metric unit

Imperial unit 

 Metric unit

 Imperial unit

 6 mm on 6 mm  1/4’’ on 1/4’’  25 mm  1”
 10 mm on 10 mm  3/8’’ on 3/8’’  12 mm  1/2”
 12 mm on 12 mm  1/2’’ on 1/2’  6 mm  1/4”
 6 mm on 20 mm  1/4’’ on 3/4’’  6 mm  1/4”
 6 mm on 25 mm  1/4’’ on 1’’  6 mm 1/4” 
 6 mm on 32 mm  1/4’’ on 1-1/4’’  6 mm  1/4”

 

For custom sizes, please consult your local sales representative or local Hardox Wearparts center for flatness guarantees. 

 

Duroxite 201 is normally supplied in an as-welded condition, but can also be supplied in a ground condition upon request.

Welding, cutting, forming and machining

Recommendations can be found in the Duroxite Product brochure, or consult your local technical support representative.