NMX B-082 M7 Tool steels

Material group: Ferrous Alloys / Tool steels
Country / Standard: Mexico / NMX

Data updates

Latest Update: 2022-04
Total number of updates: 2
Update History
2017-08

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

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NMX B-082 M7 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.9700 – 1.0500
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
3.5000 – 4.0000
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cu+Ni
VALUE
≤ 0.7500
UNIT
%
CAS NUMBER
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
P
VALUE
val1
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UNIT
%
CAS NUMBER
7723-14-0
CRITERIA
S
VALUE
val1
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UNIT
%
CAS NUMBER
7704-34-9
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

NMX-B-082: 1990 / Tool steel bars

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NMX B-082 M7 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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NMX B-082 M7 Heat Treatments

  • Preheating temperature at 730 to 840°C;
    Austenization temperature in salt bath at 1205°C or in controlled atmosphere oven at 1215°C, one minute for each millimeter of thickness. Cooling medium in air, oil or molten salts. The temperature limit must be ± 5°C. If the sample is austenised in salts, it must be immersed in the salt bath for at least 5 minutes. If it is austenized in a controlled atmosphere oven, the sample should remain at the austenization temperature for 5 to 15 minutes.
    Tempered temperature at 550°C, The annealing at 550°C is in two cycles of 2h each, with intermediate cooling at room temperature. The tempering at 540°C is in three cycles of 2h each, with cooling to room temperature. Two temperings are recommended, for a minimum of two hours, for every 25mm of section, at the same temperature. .

NMX B-082 M7 Mechanical Properties

Temperature

PROPERTY / VALUE
Brinell Hardness (HB)
≤ 269
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Rockwell Hardness (HR)
≥ 65
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  • 6Cross References
  • 10Composition
  • 2Mechanical Properties
  • 3Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • -Total Suppliers