GJB 30CrMnSiNi2A 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 41 properties — only a subset is shown here.

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GJB 30CrMnSiNi2A Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
C
VALUE
0.2700 – 0.3400
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
0.9000 – 1.2000
UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Mn
VALUE
1.0000 – 1.3000
UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Ni
VALUE
val1
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UNIT
%
CAS NUMBER
7440-02-0
CRITERIA
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3

GJB 1951: 1994 / Specification for quality structural steel bars for aviation

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GJB 30CrMnSiNi2A 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 41 properties — only a subset is shown here.

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GJB 30CrMnSiNi2A Heat Treatments


  • First heated at 890 to 900°C, cooling in oil and tempering at 200 to 300°C than air cooling. Heated again up to 890 to 900°C, isothermal nitrated at 210-280°C/1h, air cooling.

GJB 30CrMnSiNi2A Mechanical Properties


Temperature

PROPERTY / VALUE
Tensile Strength
≥ 1520 MPa
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Brinell Hardness (HB)
156 — 255
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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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GJB 30CrMnSiNi2A International Equivalent Materials


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MATERIAL
STANDARD
COUNTRY / PRODUCER
EQUIVALENCE CATEGORY
MATERIAL
STANDARD
GOST
COUNTRY / PRODUCER
Russia
EQUIVALENCE CATEGORY
Composition 100%

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  • 2Cross References

  • 17Composition
  • 17Mechanical Properties
  • 3Physical Properties
  • 1Heat Treatment
  • -Metallography
  • -Machinability

  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep

  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology

  • -Corrosion
  • -Ageing
  • -Weatherability
  • -Irradiation

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