Uddeholm QRO 90 Supreme


    With its outstanding thermal fatigue resistance, thermal conductivity, and temper back resistance, Uddeholm QRO 90 Supreme excels as a tool steel where tools temper down quickly to lower hardness. In applications such as hot stamping, brass forging, die casting core inserts and brass extrusion.

    • Excellent high temperature strength and hot hardness
    • Very good temper resistance
    • Unique resistance to thermal fatigue
    • Excellent thermal conductivity
    • Good toughness and ductility in longitudinal and transverse directions
    • Uniform machinability
    • Good heat treatment properties

    Uddeholm QRO 90 Supreme

    • Hot wear resistance 55%
    • Plastic deformation resistance 60%
    • Heat checking resistance 80%
    • Premature cracking resistance 35%

    Reference Grade Hot Work (H13)

    • Hot wear resistance 40%
    • Plastic deformation resistance 40%
    • Heat checking resistance 40%
    • Premature cracking resistance 35%
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    Chemical composition
    C 0.38 Si 0.30 Mn 0.80
    Cr 2.60 Mo 2.30 V 0.90
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