PROPRIETARY CarTech M4 Tool steels

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

Data updates

Latest Update: 2019-09
Total number of updates: 1
Update History

This material has 47 properties — only a subset is shown here.

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PROPRIETARY CarTech M4 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
1.30
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
4.50
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

Carpenter Technology Corporation, Product Data Sheets,

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PROPRIETARY CarTech M4 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 47 properties — only a subset is shown here.

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PROPRIETARY CarTech M4 Heat Treatments

  • Normalizing: Normalizing is not recommended.

    Annealing: Pack in a suitable container with clean cast iron borings. Heat uniformly to 843-871°C (1550-1600°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 (from 677-704°C (1250-1300°F)) and cool slowly. Finish machine parts after cooling.

    Hardening: Steel should be heat treated from neutral salt baths or properly adjusted controlled atmosphere furnaces. A dew point of -12°C (+10°F) is suggested for the 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 1204-1218°C (2200-2225°F). When neutral salt baths are used for hardening, the temperature should be dropped 14°C (25°F) as compared to other furnace temperatures. If the usual controls over temperature and atmosphere are employed, there should be no difficulty with decarburization. Quench in oil, ensuring that 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 inch 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.

    Forging: Preheat very slowly to 760-816°C (1400-1500°F), then increase furnace temperature to full heat of 1121°C (2050°F). Do not forge under 927°C (1700°F); reheat as often as necessary. Forgings should be cooled slowly in lime or ashes. Cool to at least 204°C (400°F) before reheating to anneal.

PROPRIETARY CarTech M4 Mechanical Properties

Temperature

PROPERTY / VALUE
Brinell Hardness (HB)
207 — 248
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Rockwell Hardness (HR)
59 — 66
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PROPRIETARY CarTech M4 International Equivalent Materials

Showing 9 of 11 results.

MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
M4
STANDARD
SAE
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
M-4
STANDARD
AISI
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
Carpenter Four Star
STANDARD
PROPRIETARY
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
Implicit
MATERIAL
A 600 M4
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
A 600 T11304
STANDARD
ASTM
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Implicit
MATERIAL
M4
STANDARD
IRAM
COUNTRY / PRODUCER
Argentina
EQUIVALENCE CATEGORY
Implicit
MATERIAL
STARK
STANDARD
PROPRIETARY
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
Implicit
MATERIAL
Evoloop M4
STANDARD
PROPRIETARY
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
Implicit
MATERIAL
M4
STANDARD
PROPRIETARY
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
Implicit

Equivalence categories reflect chemical-composition and mechanical-property comparison — always verify suitability against the governing specification for your application.

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  • 11Cross References
  • 8Composition
  • 16Mechanical Properties
  • 3Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • 8Total Suppliers