Duroxite® Cr-Zero Wire

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    General Product Description

    Duroxite® Cr-zero Wire is a non-chromium bearing flux cored hardfacing wire for open arc welding. The deposited overlay contains boron carbides which has wear resistance and hardness equal to or greater than conventional chromium carbide deposits. Duroxite® Cr-zero Wire is specifically formulated to eliminate chromium in the wire, and still provide outstanding wear resistance. Since there are no chromium alloys added in the welding wire, the emission of hexavalent chromium during welding is reduced or completely eliminated (depending on the chromium content in substrate materials or pre-existing weld deposit). Duroxite® Cr-zero Wire is a good choice of hardfacing wire for earthmoving applications when the hexavalent chromium smoke is a big concern at the workshop. It is suitable for single and double-layer deposit.

    Key Benefits

    • Duroxite® Cr-zero Wire provides very good abrasion resistance for earthmoving applications where hexavalent chromium in welding fumes cannot be reduced by work practice controls.
    • Duroxite® Cr-zero Wire maintain same wear resistance guaranteed from surface through 75% depth of overlay in multi-layer deposit.

    Typical Applications

    Duroxite® Cr-zero Wire is used for hardfacing components undergoing wear by earth, sand and abrasives in the agricultural, quarry, mining, and public works fields. Examples: Mixer shafts, impellers, buckets, shovels, transport screws, and crushers for the concrete industry.

    Standard Dimensions

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      Standard diameter
      Metric
      1.6 mm
      2.8 mm
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        Standard diameter
        Metric
        1.6 mm
        Standard diameter
        Metric
        2.8 mm

        Mechanical Properties

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          Wear properties1)
          ASTM G65 – Procedure A weight loss 2)
          Number of overlay passes Hardness: 2-layer deposit on mild steel Hardness: 3-layer deposit on mild steel Surface
          (g max)
          75 % depth of overlay 3)
          (g max)
          Multiple passes 63 - 69 HRC 65 - 69 HRC 0.18 0.18
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            1) Surface hardness is measured on machined flat surface just below overlay surface.

            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 the top surface through to the depth of 75% of the overlay.

            Chemical Composition

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              Typical all-weld metal analysis (Weight %)
              C
              (%)
              Mn
              (%)
              Si
              (%)
              Ni
              (%)
              B
              (%)
              Fe
              ()
              0.5 2.0 Up to 1.2 Up to 1.7 4.0 Balance
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                Welding recommendations

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                  Welding conditions
                  Current type Shielding gas Welding positions
                  DCEP (Direct current electrode positive) None (Self-shielded) Flat, half up, half down
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                    Welding parameters recommendations

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                      Diameter
                      Amperage (A)
                      Voltage (V)
                      Stick-out
                      Metric Range Optimum Range Optimum Range Optimum
                      1.6 mm 225 - 300 270 20 - 26 23 15.9 mm - 25.0 mm 20 mm
                      2.8 mm 290 - 310 300 29 - 31 30 15.9 mm - 25.0 mm 20 mm
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                        Recovery: 95%

                        Delivery Conditions

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                          Standard package
                          Diameter
                          Weight
                          Type Metric Metric
                          Spool 1.6 mm 15 kg
                          Spool 2.8 mm 25 kg
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                            Fabrication and Other Recommendations

                            The welded overlay components can be processed by welding, cutting, forming and machining. Specific recommendations can be found in the Duroxite® Product brochure or by consulting your local technical support representative.