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Master Bond adhesives
Bohler-Uddeholm UDDEHOLM QRO® 90 SUPREME Hot Work Tool Steel
Categories: Metal; Ferrous Metal; Alloy Steel; Chrome-moly Steel; Tool Steel; Hot Work Steel

Material Notes: Chromium-molybdenum-vanadium alloyed steel

QRO® 90 SUPREME is a premium hot work die steel with high hot yield strength and very good temper resistance. Especially suited for die casting of aluminum, copper and brass.

QRO® 90 SUPREME is characterized by:

  • 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

Applications: Die Casting Dies and Associated Tooling, Extrusion dies and Extrusion Tooling and Forging dies

Available Properties
  • Density, hardness of 45 HRC
  • Density, hardness of 45 HRC
  • Density, hardness of 45 HRC
  • Hardness, Brinell, Soft annealed (Delivery condition)
  • Tensile Strength, Ultimate, hardness of 40 HRC
  • Tensile Strength, Ultimate, hardness of 45 HRC
  • Tensile Strength, Ultimate, hardness of 48 HRC
  • Tensile Strength, Yield, hardness of 40 HRC
  • Tensile Strength, Yield, hardness of 45 HRC
  • Tensile Strength, Yield, hardness of 48 HRC
  • Modulus of Elasticity, (hardness of 45 HRC)
  • Modulus of Elasticity, hardness of 45 HRC
  • Modulus of Elasticity, hardness of 45 HRC
  • Charpy Impact, V-notch
  • Charpy Impact, V-notch
  • CTE, linear, hardness of 45 HRC
  • CTE, linear, hardened to 45 HRC
  • Thermal Conductivity, hardness of 45 HRC
  • Thermal Conductivity, hardness of 45 HRC
  • Processing Temperature, heated for 30 min, then quenched in air and tempered 2 + 2 h at 1190°F (hardness = 45 HRC)
  • Carbon, C
  • Chromium, Cr
  • Iron, Fe, As Balance
  • Manganese, Mn
  • Molybdenum, Mo
  • Silicon, Si
  • Vanadium, V
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