GB ZG12Cr9Mo2CoNiVNbNB Cast steels

Material group: Ferrous Alloys / Cast steels
Country / Standard: China / GB

Data updates

Latest Update: 2025-08
Total number of updates: 2
Update History
2020-05

This material has 49 properties — only a subset is shown here.

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GB ZG12Cr9Mo2CoNiVNbNB Chemical Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
≤ 0.02
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
B
VALUE
0.008 – 0.011
UNIT
%
CAS NUMBER
7440-42-8
CRITERIA
C
VALUE
0.10 – 0.14
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Co
VALUE
val1
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UNIT
%
CAS NUMBER
7440-48-4
CRITERIA
Cr
VALUE
val1
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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
N
VALUE
val1
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UNIT
%
CAS NUMBER
7727-37-9; 17778-88-0
CRITERIA
Nb
VALUE
val1
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UNIT
%
CAS NUMBER
7440-03-1
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
Ti
VALUE
val1
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UNIT
%
CAS NUMBER
7440-32-6
CRITERIA
V
VALUE
val1
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UNIT
%
CAS NUMBER
7440-62-2

GB/T 16253: 2019 / Steel castings for pressure purposes

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GB ZG12Cr9Mo2CoNiVNbNB Physical Properties

Temperature

PROPERTY / VALUE
Service Temperature
≤ 620 °C
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This material has 49 properties — only a subset is shown here.

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GB ZG12Cr9Mo2CoNiVNbNB Heat Treatments

  • Quenched and tempered (+QT): Quenched at 1040 to 1130°C and Tempered at 700 to 750°C + 700 to 750°C
  • Normalized or quenched at 1040-1130°C; Tempered at 720-750°C + 720-750°C (The second tempering temperature should not be higher than the first tempering temperature).

    The holding time for normalizing or quenching heating should be calculated based on the maximum wall thickness of the casting loaded in the furnace. When the thickness is less than or equal to 25 mm, the holding time shall not be less than 1 hour. For every 25 mm increase in wall thickness, the holding time shall increase by 1 hour.

GB ZG12Cr9Mo2CoNiVNbNB Mechanical Properties

Temperature

PROPERTY / VALUE
Tensile Strength
630 — 750 MPa
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Elongation, A
≥ 15 %
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Impact Energy
val1
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J
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Yield Strength, Rp0.2
≥ 500 MPa
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  • -Cross References
  • 30Composition
  • 16Mechanical Properties
  • 1Physical Properties
  • 2Heat Treatment
  • -Metallography
  • -Machinability
  • -Stress-Strain
  • -Formability
  • -Fatigue
  • -Fracture
  • -Creep
  • -Joints
  • -Coatings
  • -Dimensions
  • -Tribology
  • -Corrosion
  • -Ageing
  • -Weatherability
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