QRO 90 SUPREME

EXCELLENT HIGH TEMPERATURE STRENGTH AND HOT HARDNESS

With its outstanding thermal fatigue resistance, thermal conductivity and temper back resistance 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.

  • 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

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%

Designations

Chemical composition

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