GJB 18Cr2Ni4WA Structural and constructional steels

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

Data updates

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

This material has 127 properties — only a subset is shown here.

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GJB 18Cr2Ni4WA Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.1300 – 0.1900
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
1.3500 – 1.6500
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
CRITERIA
W
VALUE
val1
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UNIT
%
CAS NUMBER
7440-33-7

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

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GJB 18Cr2Ni4WA 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 127 properties — only a subset is shown here.

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GJB 18Cr2Ni4WA Heat Treatments

  • First quenching at 940-960°C and Second quenching at 850-860°C / air cooling, tempering at 150-170°C / air cooling.
    First quenching at 940-960°C / air cooling and Second quenching at 860-870°C / oil cooling, tempering at 525-575°C / air cooling.
  • Double quenching: at 940 to 960°C and at 850-870°C, cooling in air; Tempering at 170 to 200°C, cooling in air; For trans. direction heat treatment: quenching and tempering is: 880 ± 10°C, air cooling; 660 ± 10°C, air cooling.

GJB 18Cr2Ni4WA Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
≥ 925 MPa
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Brinell Hardness (HB)
197 — 415
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Elongation, A
≥ 5 %
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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
  • 36Composition
  • 79Mechanical Properties
  • 3Physical Properties
  • 3Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation
  • -Total Suppliers