ASTM A 508 Grade 3 Class 1 Structural and constructional steels

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

Data updates

Latest Update: 2023-07
Total number of updates: 4
Update History
2018-04 2018-03 2014-11

This material has 45 properties — only a subset is shown here.

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ASTM A 508 Grade 3 Class 1 Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
≤ 0.030
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
B
VALUE
≤ 0.003
UNIT
%
CAS NUMBER
7440-42-8
CRITERIA
C
VALUE
≤ 0.25
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Ca
VALUE
val1
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UNIT
%
CAS NUMBER
7440-70-2
CRITERIA
Cr
VALUE
val1
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UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cu
VALUE
val1
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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
Nb
VALUE
val1
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UNIT
%
CAS NUMBER
7440-03-1
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
CRITERIA
Ti
VALUE
val1
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UNIT
%
CAS NUMBER
7440-32-6
CRITERIA
V
VALUE
val1
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UNIT
%
CAS NUMBER
7440-62-2

A508/A508M: 2023 / Standard Specification for Quenched and Tempered Vacuum-Treated Carbon and Alloy Steel Forgings for Pressure Vessels

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ASTM A 508 Grade 3 Class 1 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 45 properties — only a subset is shown here.

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ASTM A 508 Grade 3 Class 1 Heat Treatments

  • Preliminary Heat Treatment: After forging and before reheating, the forgings shall be cooled to provide substantially complete transformation of austenite. Preliminary heat treatment may be applied to improve machinability and to enhance subsequent heat treatments
    Heat Treatment for Mechanical Properties: The forgings shall be heated to a temperature which produces an austenitic structure and then quenched in a suitable liquid medium by spraying or immersion. Quenching shall be followed by tempering at a subcritical temperature and holding at this temperature for a minimum time of one-half hour per inch of maximum section thickness. Except when is specified that the minimum tempering temperature shall be 635°C (1175°F), and the simulated post weld heat treatment temperature shall not exceed 620°C (1150°F), the minimum tempering temperature shall be: 650°C (1200°F).
    A multiple stage austenitizing procedure may be used whereby the forging is first fully austenitized and liquid quenched, followed by reheating within the intercritical temperature range to partially reaustenitize and again liquid quenched.

ASTM A 508 Grade 3 Class 1 Mechanical Properties

Temperature

PROPERTY / VALUE
Yield Strength, Rp0.2
345 MPa
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Tensile Strength
550 — 725 MPa
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Elongation, A
18 %
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Reduction of Area
val1
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%
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Impact Energy
val1
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J
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  • 14 Cross References
  • 15 Composition
  • 5 Mechanical Properties
  • 3 Physical Properties
  • 1 Heat Treatment
  • - Metallography
  • - Machinability
  • - Stress-Strain
  • - Formability
  • 1 Fatigue
  • - Fracture
  • 2 Creep
  • - Joints
  • - Coatings
  • - Dimensions
  • - Tribology
  • - Corrosion
  • - Ageing
  • - Weatherability
  • - Irradiation
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