Uddeholm QRO 90 Supreme

EXCELLENT HIGH TEMPERATURE STRENGTH AND HOT HARDNESS

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

Reference Grade AISI H13 / AFNOR 40 CDV 10 (ESR)

  • 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 steel parts

Uddeholm QRO 90 Supreme

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

Reference Grade

  • Hot wear resistance 40%
  • Plastic deformation resistance 40%
  • Heat checking resistance 40%
  • Premature cracking resistance 35%

Designations

Chemical composition

C Si Mn Cr Mo V
0.38 0.30 0.80 2.60 2.30 0.90

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