PROPRIETARY AerMet 340 Alloy Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels
Country / Standard: PROPRIETARY

Data updates

Latest Update: 2016-01
Total number of updates: 3
Update History
2014-07 2014-06

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PROPRIETARY AerMet 340 Alloy Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.33
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Co
VALUE
15.60
UNIT
%
CAS NUMBER
7440-48-4
CRITERIA
Cr
VALUE
2.25
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Fe
VALUE
val1
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UNIT
%
CAS NUMBER
7439-89-6
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
Ni
VALUE
val1
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UNIT
%
CAS NUMBER
7440-02-0

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PROPRIETARY AerMet 340 Alloy Physical Properties

Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 210 GPa
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Density
7.67 — 7.86 kg/dm³
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Poisson Coefficient
0.27 — 0.3
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This material has 42 properties — only a subset is shown here.

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PROPRIETARY AerMet 340 Alloy Heat Treatments

  • Heat Treated: 968°C (1775°F) for 1 hour, air cool, -73°C (-100°F) for 1 hour, air warm, 482°C (900°F) for 2.5 hours, air cool, -73°C (-100°F) for 1 hour, air warm, 482°C (900°F) for 2.5 hours, air cool, -73°C (-100°F) for 1 hour, air warm. The solution treatment temperature range is 968°C ±14°C (1775°F ±25°F) for 1 hour. The solution temperature must be monitored by a thermocouple attached to the load. Water quenching is not recommended. The alloy must be cooled from the solution temperature to 66°C (150°F) within 1 to 2 hours to develop optimum properties. Individual sections larger than 5 cm (2 inches) in diameter or 2.5 cm (1 inch) thick (plate) must be quenched in oil to reach 66°C (150°F) in 1 to 2 hours. The cooling rate of the furnace load must be monitored by a thermocouple attached to the hottest spot in the load to ensure the 2-hour cool to 66°C (150°F) is achieved.
    Cold Treatment: Following cooling to room temperature, to obtain full toughness capability, the alloy should be cooled to -73°C (-100°F) and held for 1 hour. The parts can then be air warmed to room temperature. Prior to straightening, a low-temperature stress relief at 177–204°C (350–400°F) for 5 hours following the refrigeration operation will provide an optimal combination of ductility and yield strength for mechanical straightening.
    Age: The typical aging treatment for the alloy is a single age at 482°C ±6°C (900°F ±10°F) for 3–8 hours, followed by air cooling to room temperature. Parts made from the alloy should never be aged at a temperature below 468°C (875°F).

PROPRIETARY AerMet 340 Alloy Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
1393 — 2379 MPa
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Elongation, A
11 — 18 %
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Impact Energy
val1
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J
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Reduction of Area
val1
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%
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Rockwell Hardness (HR)
val1
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Yield Strength, Rp0.2
1069 — 2068 MPa
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  • -Cross References
  • 6Composition
  • 11Mechanical Properties
  • 21Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • 1Fatigue
  • 1Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • 1Total Suppliers