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Bohler-Uddeholm UDDEHOLM HOTVAR® Hot Work Tool Steel
Categories: Metal; Ferrous Metal; Alloy Steel; Tool Steel; Hot Work Steel

Material Notes: Molybdenum-vanadium alloyed steel

Hotvar® is a premium hot work steel developed by Uddeholm to provide very good performance in tooling up to 1200°F (650°C). The alloying elements in Hotvar® are balanced to give high hot wear resistance and good high temperature properties. Manufactured by special techniques, Hotvar® is suitable for applications where hot wear and/or plastic deformation are the dominating failure mechanisms.

Hotvar is characterized by:

  • High hot wear resistance
  • Very good high temperature properties
  • High resistance to thermal fatigue
  • Very good temper resistance
  • Very good thermal conductivity
Applications: Uddeholm Hotvar is a hot-work tool steel suitable for applications where hot wear and/or plastic deformation are the dominating failure mechanisms. Applications and tools of especial interest:
  • Warm forging, dies and punches
  • Roll forging, rolling segments
  • Rock orbital forging, punches and dies
  • Upset forging, clamping tools
  • Progressive forging, dies
  • Axial closed die rolling, top and bottom dies
  • Cross forming, segments
  • Hot bending, tools
  • Hot calibration, tools
  • Zinc die casting, dies
  • Al-tube extrusion

Vendors:
Available Properties
  • Density, hardness of 56 HRC
  • Density, hardness of 56 HRC
  • Density, hardness of 56 HRC
  • Hardness, Brinell, Soft annealed
  • Hardness, Rockwell C
  • Tensile Strength, Ultimate, hardness of 54 HRC
  • Tensile Strength, Ultimate, hardness of 56 HRC
  • Tensile Strength, Ultimate, hardness of 58 HRC
  • Tensile Strength, Yield, hardness of 52 HRC
  • Tensile Strength, Yield, hardness of 56 HRC
  • Tensile Strength, Yield, hardness of 58 HRC
  • Modulus of Elasticity, (hardness of 56 HRC)
  • Modulus of Elasticity, hardness of 56 HRC
  • Modulus of Elasticity, hardness of 56 HRC
  • Charpy Impact, V-notch
  • Charpy Impact, V-notch
  • CTE, linear, hardness of 56 HRC
  • CTE, linear, hardened to 56 HRC
  • Thermal Conductivity, hardness of 56 HRC
  • Thermal Conductivity, hardness of 56 HRC
  • Thermal Conductivity, hardness of 56 HRC
  • Processing Temperature, hardening temperature, then quenched in air and tempered 2 + 2 h at 1070°F (hardness = 56 HRC)
  • Carbon, C
  • Chromium, Cr
  • Iron, Fe, As Balance
  • Manganese, Mn
  • Molybdenum, Mo
  • Silicon, Si
  • Vanadium, V
  
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