PROPRIETARY CarTech M7 Tool Steel Tool steels

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

Data updates

Latest Update: 2025-03
Total number of updates: 1
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This material has 23 properties — only a subset is shown here.

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PROPRIETARY CarTech M7 Tool Steel Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
1.00
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
4.00
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Fe
VALUE
Balance
UNIT
%
CAS NUMBER
7439-89-6
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

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PROPRIETARY CarTech M7 Tool Steel 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 23 properties — only a subset is shown here.

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PROPRIETARY CarTech M7 Tool Steel Heat Treatments

  • Annealing: Pack in a suitable container with clean cast iron borings. Heat uniformly to 830-857°C (1525-1575°F) and cool slowly in the furnace to 593°C (1100°F) at a rate of 11-22°C (20-40°F) per hour. To relieve machining stresses for greater accuracy in hardening, first rough machine, then anneal below the critical 677-704°C (1250-1300°F) and cool slowly. Finish machine parts after cooling.
    Hardening: from neutral salt baths or properly adjusted controlled atmosphere furnaces. A dew point of -12°C (+10°F) is suggested for a high-heat furnace when using controlled atmosphere. First, preheat to 760-816°C (1400-1500°F), then transfer to a superheating furnace with a temperature maintained at 1177-1218°C (2150-2225°F). When neutral salt baths are used for hardening, the temperature should be dropped 14°C (25°F) as compared to other furnace temperatures. Quench in oil, ensuring that the tools are cooled below 93°C (200°F) before tempering (cool enough to hold in your hand). Small sizes under about 25.4 mm in diameter or delicate sections may be hardened by cooling in still air. It is also acceptable to quench in molten salt at temperatures of 538-593°C (1000-1100°F), equalizing for 5 minutes per 25.4 mm followed by air cooling.
    Tempering: Be sure to allow sufficient time for the tools to reach the proper temperature and then start timing the tempering operation. Tools should be tempered immediately after the completion of the quench. For best results with most tools, a range of 538-649°C (1000-1200°F) is suitable. For cutting tools, double or triple temper at 538-566°C (1000-1050°F) where maximum wear resistance is desired.

PROPRIETARY CarTech M7 Tool Steel Mechanical Properties

Temperature

PROPERTY / VALUE
Brinell Hardness (HB)
240
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Rockwell Hardness (HR)
59 — 66
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  • 2Cross 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