SAE 6539 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels
Country / Standard: United States / SAE

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SAE 6539 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.32 – 0.40
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
1.60 – 2.00
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cu
VALUE
≤ 0.20
UNIT
%
CAS NUMBER
7440-50-8
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
Ni
VALUE
val1
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UNIT
%
CAS NUMBER
7440-02-0
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

SAE AMS 6539A: 2018 / Steel Bars, Forgings, and Tubing 1.7Cr - 3.8Ni - 0.3Mo (0.32 - 0.38 C) Aircraft-Quality

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SAE 6539 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 65 properties — only a subset is shown here.

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SAE 6539 Heat Treatments


  • Specimens extracted from the product for both tempering temperatures after being austenitized by heating to 1607°F ± 25°F (875°C ± 14°C), holding at heat for a time commensurate with section thickness, heating equipment, and procedure used.
    Specimens to be tempered at 392°F (210°C) shall be air quenched to below 90°F (32°C), cooled to -100°F (-73°C) or colder, holding at that temperature for not less than 2 hours and warmed in air to room temperature.
    Specimens to be tempered at 1040°F (560°C) shall be air quenched to below 90°F (32°C). All specimens shall be tempered for 2 hours minimum.

SAE 6539 Mechanical Properties


Temperature

PROPERTY / VALUE
Tensile Strength
≥ 980 MPa
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Brinell Hardness (HB)
≤ 310
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Elongation, A
≥ 8 %
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Grain Size
val1
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Impact Energy
val1
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J
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Yield Strength, Rp0.2
val1
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MPa
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SAE 6539 International Equivalent Materials


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MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
STANDARD
UNS
COUNTRY / PRODUCER
United States
EQUIVALENCE CATEGORY
Official

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  • 1Cross References

  • 9Composition
  • 15Mechanical Properties
  • 3Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability

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

  • -Joints
  • -Coatings
  • 36Dimensions
  • -Tribology

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

  • -Total Suppliers