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Duroxite® 201

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    General Product Description

    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:

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      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, screws, gyratory mantles, coal and cement pulverizer rolls, raw material crushing components, molding panels
      Power Coal discharger chutes
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        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, screws, gyratory mantles, coal and cement pulverizer rolls, raw material crushing components, molding panels
        Power
        Coal discharger chutes

        For more information on applications see the Duroxite™ Product brochure.

        Standard Dimensions

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          Standard overlay thicknesses
          Metric unit
          6 mm on 6 mm
          10 mm on 10 mm
          6 mm on 20 mm
          6 mm on 25 mm
          6 mm on 32 mm
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            Standard overlay thicknesses

            Metric unit
            6 mm on 6 mm
            Standard overlay thicknesses

            Metric unit
            10 mm on 10 mm
            Standard overlay thicknesses

            Metric unit
            6 mm on 20 mm
            Standard overlay thicknesses

            Metric unit
            6 mm on 25 mm
            Standard overlay thicknesses

            Metric unit
            6 mm on 32 mm

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

            Standard plate sizes

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              Metric unit Imperial unit
              1.85 m x 2.85 m 6.1' x 9.3'
              1.2 m x 2.4 m 4' x 8'
              1.5 m x 3.0 m 5' x 10'
              1.8 m x 3.0 m 6' x 10'
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                Metric unit
                1.85 m x 2.85 m
                Imperial unit
                6.1' x 9.3'
                Metric unit
                1.2 m x 2.4 m
                Imperial unit
                4' x 8'
                Metric unit
                1.5 m x 3.0 m
                Imperial unit
                5' x 10'
                Metric unit
                1.8 m x 3.0 m
                Imperial unit
                6' x 10'

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

                Mechanical Properties

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                  Wear properties
                  ASTM G65 – Procedure A weight loss 2)
                  Number of overlay passes Typical surface hardness1)

                  (HRC)                  		 Typical surface hardness1)

                  (HV)                  		 Surface
                  (g max)                  		 75 % depth of overlay 3)
                  (g max)
                  Multiple passes 60 - 65 700 - 850 0.12 0.12
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                    1) Surface hardness is measured on machined flat surface just below overlay surface.

                    2) ASTM G65 - Procedure A weight loss, 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 - Procedure A weight loss, wear test is conducted at 75% depth of the overlay materials to ensure consistently good wear resistance from the top surface through to the depth of 75% of the overlay.

                    Microstructure

                    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.

                    Tolerances

                    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.

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                      Standard overlay thicknesses
                      Plate flatness tolerance gauranteed over 1.5m (5'),
                      Metric unit
                      Metric unit 1.5 m x 3.0 m 1.8 m x 3.0 m 2.4 m x 3.0 m
                      5 mm on 8 mm 12 mm 32 mm 38 mm
                      6 mm on 6 mm 12 mm 32 mm 38 mm
                      10 mm on 10 mm 6 mm 19 mm 25 mm
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                        For custom sizes, please consult your local sales representative or Hardox Wearparts center for flatness guarantees.

                        Delivery Conditions

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

                        Fabrication and Other Recommendations

                        Welding, cutting, forming and machining

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

                        Safety precautions

                        When welding or cutting Duroxite® products, gases and harmful fumes are produced that are chemically complex and difficult to classify. The major toxic component in the fumes is hexavalent chromium. The proper exhaust ventilation equipment and fume-extraction torches are recommended, as well as suitable protective clothing and respiratory protection for operators.