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Duroxite™-Taking Durability to the Extreme

Duroxite 200

Duroxite 200 consists of specially formulated abrasive materials deposited on mild steel backing plate that is suitable for extremely severe abrasive wear and high to moderate impact applications.

The overlay material is composed of primary chromium-rich carbides and refined multiple-alloy complex carbides dispersed evenly in a ductile eutectic austenite matrix. Duroxite 200 is available in single and double layers. 

Key Benefits

  • Multiple-alloy complex carbides are harder and finer than chromium carbides and interlock between the primary chromium carbides to provide better wear resistance
  • Longer service life and better wear resistance compared to traditional chromium carbide overlay plate
  • Double-layer overlay maintains full wear resistance up to 600° C (1100° F)

Typical Applications

Duroxite 200 is widely used in many industries including mining, cement and steel. Some specific applications include:

  • Mining: Chutes, liner plates, conveyors sides, underground mine skips
  • 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
  • Steel: Ore sintering, crushing, riddling, blast furnace hoppers, throats, and ovens

Duroxite 200

Duroxite 200

Standard overlay thicknesses 

 Standard plate sizes

 Single pass

 Multiple passes

 Metric unit

Imperial unit 

 Metric unit

Imperial unit 

 Metric unit

 Imperial unit

 3 mm on 6 mm  1/8’’ on 1/4’’  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
2.4 m x 3.0 m
 4’ x 8’
5’ x 10’
6’ x 10’
8’ x 10’
     6 mm on 10 mm  1/4’’ on 3/8’’
     10 mm on 10 mm  3/8’’ on 3/8’’

Other plate sizes and custom thicknesses can be produced upon request. 

 

Surface Hardness

 

Number of overlay passes 

 Typical surface hardness 1)

 Single pass  57 to 60 HRC (630 to 700 HV)
 Double 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)

 Single pass  0.19 g maximum  0.19 g maximum
 Double 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 200 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 210 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 

 1.8 m x 3.0 m (6’ x 10’)

2.4 m x 3.0 m (8’ x 10’) 

 Metric unit

 Imperial unit

 Metric unit

 Imperial unit

 Metric unit

 Imperial unit

 5 mm on 7 mm  3/16” on 5/16”  25 mm  1”  41 mm  1-5/8”
 6 mm on 6 mm  1/4” on 1/4’’  25 mm  1”  Not available
 10 mm on 10 mm  3/8” on 3/8”  12 mm  1/2”  25 mm  1”
 12 mm on 12 mm  1/2” on 1/2”  6 mm  1/4”  16 mm  5/8”

 

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

 

Duroxite 200 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.