GB 40CrNi2MoA Structural and constructional steels

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

Data updates

Latest Update: 2020-10
Total number of updates: 1
Update History

This material has 30 properties — only a subset is shown here.

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GB 40CrNi2MoA Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.38 – 0.43
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
0.70 – 0.90
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

GB/T 38809: 2020 / General specification for low alloy ultra-high strength steels

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GB 40CrNi2MoA 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 30 properties — only a subset is shown here.

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GB 40CrNi2MoA Heat Treatments

  • Heat treatment 1: Heated at 900° C ± 10° C, for 1h ± 0.1h, air cooling;
    Heated at 850° C ± 20° C, for 1h ± 0.1h, oil quenching;
    Heated at 560° C ± 10° C, for 2h ± 0.2h, air cooling.
    Heat treatment 2: Heated at 900° C ± 10° C, for 1h ± 0.1h, air cooling.
    Heated at 840° C ± 10° C, for 1h ± 0.1h, oil quenching;
    First time heated at 220° C ± 20°C, for 2h ± 0.2h, air cooling;
    Second time heated at 220° C ± 20°C, for 2h ± 0.2h, air cooling.

GB 40CrNi2MoA Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
≥ 1080 MPa
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Brinell Hardness (HB)
≤ 269
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Elongation, A
≥ 6 %
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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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Yield Strength, Rp0.2
val1
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MPa
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  • 6Cross References
  • 9Composition
  • 10Mechanical Properties
  • 3Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • 1Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • -Total Suppliers