GJB 12CrNi3A Structural and constructional steels

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

Data updates

Latest Update: 2016-11
Total number of updates: 1
Update History

This material has 104 properties — only a subset is shown here.

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GJB 12CrNi3A Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.1100 – 0.1700
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
0.6000 – 0.9000
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Cu
VALUE
≤ 0.2500
UNIT
%
CAS NUMBER
7440-50-8
CRITERIA
Mn
VALUE
val1
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UNIT
%
CAS NUMBER
7439-96-5
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

GJB 1220A: 2008 / Specification for alloy structure steel bar for artillery parts

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GJB 12CrNi3A 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 104 properties — only a subset is shown here.

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GJB 12CrNi3A Heat Treatments

  • First quenching at 850°C to 870°C and Second quenching at 780-810°C / oil cooling; tempering at 150-170°C / air cooling.
  • Double quenching: at 850 to 870°C and at 760 to 810°C, cooling in oil; Tempering at 150 to 200°C, cooling in air.

GJB 12CrNi3A Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
≥ 885 MPa
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Brinell Hardness (HB)
143 — 388
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Elongation, A
≥ 10 %
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Impact Strength
val1
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kJ/m²
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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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Impact Energy
val1
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J
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  • 4Cross References
  • 33Composition
  • 60Mechanical Properties
  • 3Physical Properties
  • 4Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
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