PROPRIETARY LESCALLOY 4340 VAC-ARC Structural and constructional steels

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

Data updates

Latest Update: 2025-03
Total number of updates: 1
Update History

This material has 54 properties — only a subset is shown here.

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PROPRIETARY LESCALLOY 4340 VAC-ARC Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
≤ 0.4000
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
≤ 0.8000
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
≤ 0.7500
UNIT
%
CAS NUMBER
7439-96-5
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
CRITERIA
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3

Timken Steel Corporation, Product Data Sheets,

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PROPRIETARY LESCALLOY 4340 VAC-ARC Physical Properties


Temperature

PROPERTY / VALUE
Modulus of Elasticity
190 — 210 GPa
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Thermal Conductivity
37.48 W/(m∙°C)
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Density
7.67 — 7.86 kg/dm³
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Heat Capacity
val1
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J/(kg∙°C)
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Poisson Coefficient
val1
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This material has 54 properties — only a subset is shown here.

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PROPRIETARY LESCALLOY 4340 VAC-ARC Heat Treatments


  • Normalize: 871-927°C (1600-1700°F), air cool;
    Austenitize: 802-857°C (1475-1575°F), oil quench;
    Temper: 204-649°C (400-1200°F), depending on desired strength. Temper between 204-260°C (400-500°F) to obtain tensile strengths above 1793 MPa.

PROPRIETARY LESCALLOY 4340 VAC-ARC Mechanical Properties


Temperature

PROPERTY / VALUE
Tensile Strength
1140 — 1905 MPa
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Elongation, A
8 — 18 %
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Reduction of Area
val1
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%
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Yield Strength, Rp0.2
1035 — 1530 MPa
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PROPRIETARY LESCALLOY 4340 VAC-ARC International Equivalent Materials


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MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
STANDARD
PROPRIETARY
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
Composition 100%

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  • 6Cross References

  • 18Composition
  • 12Mechanical Properties
  • 13Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability

  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep

  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology

  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation

  • 4Total Suppliers