PROPRIETARY Uddeholm Hotvar Tool steels

Material group: Ferrous Alloys / Tool steels
Country / Standard: PROPRIETARY

Data updates

Latest Update: 2016-11
Total number of updates: 3
Update History
2016-04 2016-01

This material has 42 properties — only a subset is shown here.

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PROPRIETARY Uddeholm Hotvar Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.5500
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
2.6000
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
0.7500
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3
CRITERIA
V
VALUE
val1
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UNIT
%
CAS NUMBER
7440-62-2

Böhler-Uddeholm AG, Product Data Sheets,

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PROPRIETARY Uddeholm Hotvar Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 210 GPa
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Density
val1
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kg/dm³
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Thermal Conductivity
31 W/(m∙°C)
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Poisson Coefficient
val1
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This material has 42 properties — only a subset is shown here.

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PROPRIETARY Uddeholm Hotvar Heat Treatments

  • Unless otherwise is indicated all specimens were hardened at 1050°C (1920°F), quenched in air and tempered 2+2 h at 575°C (1070°F) to a hardness corresponding to 56 HRC. General recommendations: Soft annealing: Protect the steel and heat through to 820°C (1500°F). Then cool in the furnace at 11°C (20°F) per hour to 600°C (1110°F), then freely in air; Stress relieving: After rough machining the tool should be heated through to 650°C (1200°F), holding time 2 hours. Cool slowly to 350°C (660°F), then freely in air; Hardening: Pre-heating temperature: first step at 480-600°C (895-1110°F), second step at 850 (1560°F). Austenitizing temperature: 1050-1070°C (1920-1960°F), normally 1050°C (1920°F) but when maximum hardness is required the normally temperature is 1070°C (1960°F). (At 1050°C (1920°F) - Soaking time: 30 min, Hardness before tempering for d = 25 mm: 61 ± 1 (Oil) and 59 ±1 (Air); At 1070°C (1960°F) - Soaking time: 20 min, Hardness before tempering for d = 25 mm: 62 ± 1 (Oil) and 60 ±1 (Air)); Quenching media: High speed gas/circulating atmosphere, Vacuum (high speed gas with sufficient positive pressure), Martempering bath or fluidized bed at 450-550°C (840-1020°F), Martempering bath or fluidized bed at approx. 180-220°C (360-430°F), Warm oil, approx. 80°C (175°F). (Temper the tool as soon as its temperature reaches 50-70°C (120-160°F); In order to obtain the optimum properties for the tool, the cooling rate should be fast, but not at a level that gives excessive distortion or cracks.); Tempering: Choose the tempering temperature according to the hardness. Temper minimum twice with intermediate cooling to room temperature. Holding time at temperature minimum 2 h.

PROPRIETARY Uddeholm Hotvar Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
2100 — 2300 MPa
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Brinell Hardness (HB)
210
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Rockwell Hardness (HR)
val1
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Yield Strength, Rp0.2
1800 — 1850 MPa
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  • -Cross References
  • 6Composition
  • 10Mechanical Properties
  • 14Physical Properties
  • 6Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • 2Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • 4Total Suppliers