GB 38CrMoAlA Structural and constructional steels

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

Data updates

Latest Update: 2022-03
Total number of updates: 3
Update History
2015-08 2014-10

This material has 171 properties — only a subset is shown here.

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GB 38CrMoAlA Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
0.70 – 1.10
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
C
VALUE
0.35 – 0.42
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
1.35 – 1.65
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
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

GB/T 3079: 1993 / Alloy structure steel wires

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GB 38CrMoAlA 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
val1
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Coefficient of Thermal Expansion (CTE)
val1
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10-6/°C
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Thermal Conductivity
37.67 W/(m∙°C)
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This material has 171 properties — only a subset is shown here.

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GB 38CrMoAlA Heat Treatments

  • Quenching at 930-950°C / water or oil cooling; tempering at 600-670°C / water or oil cooling.
  • Tempered at 930-960°C, air-cooled at 650-680°C; Quenched and tempered (1) and (2): Heated at 930-950°C (oil or warm water quenched) and tempered at 600-670°C (oil or water cooled);

GB 38CrMoAlA Mechanical Properties

Temperature

PROPERTY / VALUE
Yield Strength, Rp0.2
val1
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MPa
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Tensile Strength
930 MPa
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Elongation, A
15 %
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Reduction of Area
val1
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%
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Brinell Hardness (HB)
≤ 269
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  • 69 Cross References
  • 10 Composition
  • 20 Mechanical Properties
  • 12 Physical Properties
  • 2 Heat Treatment
  • - Metallography
  • - Machinability
  • 4 Stress-Strain
  • - Formability
  • - Fatigue
  • - Fracture
  • - Creep
  • - Joints
  • - Coatings
  • - Dimensions
  • - Tribology
  • - Corrosion
  • - Ageing
  • - Weatherability
  • - Irradiation
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