PROPRIETARY WM T-75 Tool steels

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

Data updates

Latest Update: 2018-06
Total number of updates: 1
Update History

This material has 31 properties — only a subset is shown here.

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PROPRIETARY WM T-75 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.35
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Co
VALUE
3.00
UNIT
%
CAS NUMBER
7440-48-4
CRITERIA
Cr
VALUE
3.50
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
val1
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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 WM T-75 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 31 properties — only a subset is shown here.

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PROPRIETARY WM T-75 Heat Treatments

  • Forging:Heating for forging must be done slowly and uniformly. Soak through at 1900- 2050°F (1038-1121°C), and stop work when the temperature drops below 1650°F (899°C). After forging, cool slowly in lime, mica, dry ashes, or a furnace. Should always be annealed after forging.
    Annealing:Heat slowly to 1550- 1650°F (843-899°C), hold until the entire mass is heated through and cool slowly in the furnace (40°F (22°C) per hour) to about 1000°F (538°C), after which the cooling rate may be increased. Suitable precautions must be taken to prevent excessive carburization or decarburization.
    Strain relieving:When desirable to relieve the strains of machining, heat slowly to 1100-1250°F (593-676°C), allow to equalize, and then cool in air.
    Preheat for hardening:Warm slightly before charging into the preheat furnace, which should be operating at 1400-1500°F (760-816°C).
    Hardening:It is a steel which has medium hardenability and the use of interrupted oil quenching is recommended to obtain optimum properties. The use of a salt bath, controlled atmosphere, or vacuum furnace is desirable to prevent decarburization. If this equipment is not available, pack hardening in spent pitch coke is suggested. The recommended austenitizing temperature range is 1850° to 1950°F (1010-1066°C). At the lower end of the range, the toughness of the steel will be maximized. At the higher end of the range, the elevated-temperature strength and thermal fatigue resistance will be maximized. For pressurized gas quenching in a vacuum furnace, the quench rate of the work piece to 1000°F (538°C) must be a minimum of 50°F (10°C) per minute.
    Tempering:Typical tempering temperatures are 1050-1150°F (566-621°C), but may be varied depending upon the size of the work piece. Double tempering is mandatory, and triple tempering is recommended. Typical tempered hardnesses are given below for two austenitizing temperatures.

PROPRIETARY WM T-75 Mechanical Properties

Temperature

PROPERTY / VALUE
Rockwell Hardness (HR)
33 — 59
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  • 1Cross References
  • 7Composition
  • 14Mechanical Properties
  • 7Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • 1Total Suppliers