PROPRIETARY ExELL 420 SMDQ Tool steels

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

Data updates

Latest Update: 2018-07
Total number of updates: 2
Update History
2018-06

This material has 39 properties — only a subset is shown here.

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PROPRIETARY ExELL 420 SMDQ Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.38
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
13.75
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
0.45
UNIT
%
CAS NUMBER
7439-96-5
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 ExELL 420 SMDQ Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 210 GPa
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Thermal Conductivity
val1
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W/(m∙°C)
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Density
val1
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kg/dm³
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Heat Capacity
val1
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J/(kg∙°C)
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Poisson Coefficient
val1
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This material has 39 properties — only a subset is shown here.

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PROPRIETARY ExELL 420 SMDQ Heat Treatments

  • Stress relieving: After rough machining of an annealed component, heat the part to 1200°F (649°C), equalize and hold 1-2 hours. Furnace cool to 900°F (482°C) and then air cool to room temperature.
    Annealing: With a protective atmosphere or vacuum furnace, heat slowly to 1450°F (788°C). Equalize and hold one hour per inch of thickness. Furnace cool 20°F (11°C)/hr to 1200°F (649°C) and equalize. Air cool to room temperature. Hardness - 229 HB max. Protect against decarburization and oxidation during austenitizing.
    Preheating: Heat to 1200°F (649°C) and equalize, continue heating to 1550°F (843°C) and equalize. Complete heating to hardening temperature.
    Hardening: Typical austenitizing range is 1870-1920°F (1021-1049°C). Hardening temperature can be adjusted to develop maximum hardness. A hardening temperature of 1870-1880°F (1021-1027°C) is normally used for most applications while 1910-1920°F (1043-1049°C) can be used for maximum hardness.
    Hardening temperature: 1870°F (1021 C°), hold time 30 min, as quenched hardness 56 ± 2 HRC.
    Hardening temperature: 1910°F (1043 C°), hold time 30 min, as quenched hardness 57 ± 2 HRC.
    Quenching: Should be performed as rapidly as possible without promoting excessive movement or cracking. Typical quenching media include: High speed gas with sufficient positive pressure in vacuum furnace; Circulate air/atmosphere; Excellent steel cleanliness; Martempering bath or fluidized bed at 480-1020°F (249-549°C), then air cool at room temp; Warm oil.
    Tempering: Temper immediately after quenching to about 150°F (66°C).Temper a minimum of two times with intermediate cooling to room temperature. Choose the tempering temperature to develop required hardness. (However, tempering at 480°F (249°C) is recommended for the optimum balance of hardness, toughness, corrosion resistance and dimensional stability). Should be heated to the desired tempering temperature and held a minimum of two hours. Air cool to room temperature.

PROPRIETARY ExELL 420 SMDQ Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
1447.9 — 1758.2 MPa
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Yield Strength, Rp0.2
1275.5 — 1482.4 MPa
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Rockwell Hardness (HR)
40 — 52
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  • 5Cross References
  • 5Composition
  • 12Mechanical Properties
  • 15Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • 1Total Suppliers