GB 20NiCrMoA Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels
Country / Standard: China / GB
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This material has 21 properties — only a subset is shown here.

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GB 20NiCrMoA Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
0.020 – 0.050
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
C
VALUE
0.17 – 0.23
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
0.35 – 0.65
UNIT
%
CAS NUMBER
7440-47-3
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 10560: 2008 / Steels for welded round link chains for mines

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GB 20NiCrMoA 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 21 properties — only a subset is shown here.

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GB 20NiCrMoA Heat Treatments

  • Quenching at 880°C, water cooling; Tempered at 430°C, water or oil cooling.

GB 20NiCrMoA Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
≥ 1180 MPa
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Brinell Hardness (HB)
220 — 260
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Elongation, A
≥ 10 %
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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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  • 1Cross References
  • 9Composition
  • 6Mechanical Properties
  • 3Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • 1Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
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