PROPRIETARY WM M-42 Tool steels

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

Data updates

Latest Update: 2018-05
Total number of updates: 1
Update History

This material has 22 properties — only a subset is shown here.

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PROPRIETARY WM M-42 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
1.10
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Co
VALUE
8.00
UNIT
%
CAS NUMBER
7440-48-4
CRITERIA
Cr
VALUE
3.75
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
CRITERIA
W
VALUE
val1
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UNIT
%
CAS NUMBER
7440-33-7

Ellwood Specialty Steel, Product Data Sheets,

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PROPRIETARY WM M-42 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 22 properties — only a subset is shown here.

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PROPRIETARY WM M-42 Heat Treatments

  • Forging: Heating for forging must be done slowly and uniformly, with care being taken not to put cold steel into a hot furnace. Soak through at 1700-1800°F and then heat to 1900-2050°F for initial forging. Do not forge below 1650-1700°F, and when forging is completed, cool slowly in lime, mica, dry ashes or furnace.
    Annealing: Heat slowly to 1525-1550°F, hold until the entire mass is heated through, and cool slowly in the furnace (30°F per hour) to about 1000°F, 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 1150-1250°F, allow to equalize, and then cool in still air.
    Preheat for hardening: Warm slightly before charging into the preheat furnace, which should be operating at about 1450-1550°F.
    Hardening: After thorough preheating, transfer to the hardening furnace, (salt bath or controlled atmosphere furnace recommended) operating at 2150-2200°F, depending on the degree of hardening required for application, and the size of the tool. It is important that the temperature be accurately controlled to avoid overheating.
    Quenching: Quench in oil or a molten salt bath operating at 1000- 1075°F. In the case of oil quenching, it is usually good practice to interrupt the quench by removing the tool after it has cooled to 900-1000°F, and continue the cooling in still air. Where a salt quench is employed, the tool should be held only long enough to equalize at the bath temperature, and then should be removed and cooled in air. Any necessary straightening should be done while cooling in the range of 850-450°F. tools should be allowed to cool to 150°F, or to where they can be held in the bare hand, and then tempered immediately.
    Tempering: Multiple tempering is absolutely necessary. Triple tempering will generally suffice, but if the hardening temperature has been on the high side, a fourth temper should be used to insure transformation of retained austenite and to achieve maximum toughness. The typical response to tempering is shown in the following chart.

PROPRIETARY WM M-42 Mechanical Properties

Temperature

PROPERTY / VALUE
Rockwell Hardness (HR)
59.2 — 69.5
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  • 1Cross References
  • 8Composition
  • 8Mechanical Properties
  • 3Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • 1Total Suppliers