PROPRIETARY Uddeholm Skolvar Tool steels

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

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PROPRIETARY Uddeholm Skolvar Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.7
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
5.0
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
0.45
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

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PROPRIETARY Uddeholm Skolvar Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 210 GPa
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Density
7.72 — 8 kg/dm³
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Poisson Coefficient
0.27 — 0.3
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This material has 12 properties — only a subset is shown here.

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PROPRIETARY Uddeholm Skolvar Heat Treatments

  • Soft Annealing
    Protect the steel and heat through to 850°C (1560°F). Then cool in furnace at 10°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 500°C (930°F), then freely in air.
    Hardening
    Preheating temperature: 600 - 650°C (1110 - 1200°F) and 850 - 900°C (1560 - 1650°F). Austenitizing temperature: 1050 - 1150°C (1920 - 2100°F), normally 1050°C (1920°F) or 1130°C (2066°F). Holding time: 30 minutes (<1100°C) or 10 minutes (≥1100°C). Protect the tool against decarburization and oxidation during austenitizing.
    Quenching Media
    High speed gas/circulating atmosphere, vacuum furnace (high speed gas with sufficient overpressure). Temper the tool as soon as its temperature reaches 50 - 70°C (120 - 160°F). To obtain the optimum properties for the tool, the cooling rate should be as fast as possible with regards to acceptable distortion.
    Tempering
    Choose the tempering temperature according to the hardness required. Temper at least twice with intermittent cooling to room temperature. High temperature tempering >525°C (980°F) is recommended whenever possible.
  • Austenitizing temperature 1050°C (1922°F). Holding time 30 minutes.

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  • -Cross References
  • 6Composition
  • -Mechanical Properties
  • 3Physical Properties
  • 3Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
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