GB/T 8492-2024 English PDF (GB/T8492-2024)

GB/T 8492-2024: Heat-resistant cast steels and alloys for general applications
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GB/T 8492-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.80
CCS J 31
Replacing GB/T 8492-2014
Heat-Resistant Cast Steels and Alloys for General
Applications
(ISO 11973:2023, MOD)
ISSUED ON: APRIL 25, 2024
IMPLEMENTED ON: APRIL 25, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 8
4 General Delivery Conditions ... 8
5 Manufacturing Process ... 8
6 Technical Requirements ... 9
7 Test Methods ... 15
8 Inspection Rules ... 17
9 Marking, Quality Certificate, Packaging, Storage and Transportation ... 18
Appendix A (Informative) Structural Changes between this Document and ISO
11973:2023 ... 20
Appendix B (Informative) Technical Differences and Their Causes between
This Document and ISO 11973:2023 ... 21
Appendix C (Informative) Designation Comparison between This Document
and ISO11973:2023 and UNS ... 23
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1: Rules for the Structure and Drafting of Standardizing Documents.
This Document replaced GB/T 8492-2014 Heat-Resistant Steel and Alloy Castings for General
Applications. Compared with GB/T 8492-2014, the major technical changes of this Document
are as follows besides the structural adjustments and editorial modifications:
a) Add the definitions of "major defect" and "welding groove for cast defect" (see Clause 3
of this Edition);
b) Add general delivery conditions (see Clause 4 of this Edition);
c) Add manufacturing process (see Clause 5 of this Edition);
d) Change the requirements for welding (see 5.4 of this Edition; 3.9 and Appendix A of the
2014 Edition);
e) Change the chemical compositions of some designations (see Table 1 of this Edition;
Table 1 of the 2014 Edition);
f) Change the internal quality requirements (see 6.4 of this Edition; 3.7 of the 2014 Edition);
g) Change the provisions of single casting test blocks (see 7.2.1.2 of this Edition; 4.2.1.2 of
the 2014 Edition);
h) Change the marking, quality certificate, packaging, storage and transportation (see Clause
9 of this Edition; Clause 6 of the 2014 Edition);
i) Delete "inspection procedures" and "inspection locations" (see 5.1 and 5.2 of the 2014
Edition).
This Document modified and adopted ISO 11973:2023 Heat-Resistant Cast Steels and Alloys
for General Applications.
Compared with ISO 11973:2023, this Document made more structural adjustments. See
Appendix A for a comparison of changes in the structure numbers between the two documents.
Compared with ISO 11973:2023, this Document has many technical differences, which are
marked with a vertical single line (|) in the outer margin of the relevant clauses. A list of these
technical differences and their causes is given in Appendix B.
This Document also made the following editorial modifications:
--- Change the designations in ISO 11973:2023; and replace it with the corresponding
Heat-Resistant Cast Steels and Alloys for General
Applications
1 Scope
This Document specifies the manufacturing, technical requirements, test methods, inspection
rules and marking, quality certificates, packaging, storage and transportation of heat-resistant
steels and alloy castings for general applications.
This Document is applicable to heat-resistant steels and alloy castings for general applications
used under high-temperature working conditions. Other types of heat-resistant steels and alloy
castings can also be implemented as a reference.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 223.3 Methods for chemical analysis of iron, steel and alloy - The diantipyryl
methane phosphomolybdate gravimetric method for the determination of phosphorus
content
GB/T 223.11 Iron, steel and alloy - Determination of chromium content - Visual titration
or potentiometric titration method
GB/T 223.20 Methods for chemical analysis of iron steel and alloy - The Potentiometric
titration method for the determination of cobalt content
GB/T 223.21 Methods for chemical analysis of iron steel and alloy - The 5-Cl-PADAB
spectrophotometric method for the determination of cobalt content
GB/T 223.22 Methods for chemical analysis of iron, steel and alloy - The nitroso-R-salt
spectrophotometric method for the determination of cobalt content
GB/T 223.23 Iron, Steel and Alloy-Determination of Nickel Content - The
Dimethylglyoxime Spectrophotometric Method
7.2.1.3 The sampling position of the attached casting test blocks shall be determined by the
purchaser; and the shape and size of the test blocks shall be determined by the supplier. If heat
treatment is required, the attached casting test blocks are allowed to be cut with appropriate
gaps before heat treatment, but a 10 mm to 30 mm gap shall be left to connect to the main body.
The test blocks shall not be separated from the castings before the final performance heat
treatment of the castings.
7.2.2 Tensile properties
The tensile test at room temperature shall be carried out in accordance with the provisions of
GB/T 228.1; the tensile test at high temperature shall be carried out in accordance with the
provisions of GB/T 228.2.
7.2.3 Brinell hardness
The Brinell hardness test shall be carried out in accordance with the provisions of GB/T 231.1.
7.3 Surface quality
7.3.1 Surface roughness test of castings shall be carried out in accordance with the provisions
of GB/T 15056.
7.3.2 Visual inspection of surface quality of sand castings shall be carried out in accordance
with the provisions of GB/T 39428.
7.3.3 Penetrant test of castings shall be carried out in accordance with GB/T 9443.
7.3.4 Magnetic particle test of castings shall be carried out in accordance with the provisions of
GB/T 9444.
7.4 Internal quality
7.4.1 Radiographic test of castings shall be carried out in accordance with the provisions of
GB/T 5677.
7.4.2 Ultrasonic test of castings shall be carried out in accordance with the provisions of GB/T
7233.1.
7.5 Geometry and size
For the test of casting geometry and size, testing tools, gauges or templates of corresponding
accuracy shall be selected. 3-coordinate measuring instruments, 3D scanners or scribing test
may also be used.
8 Inspection Rules
8.1 Inspection batches
Inspection batches are divided as follows.
a) By furnace: Castings with the same smelting furnace and the same heat treatment furnace
are considered as one batch.
b) By quantity: Castings with a certain quantity or weight of the same material designation
cast from multiple smelting furnaces and subjected to the same heat treatment process under
stable smelting process are considered as one batch.
c) By workpiece: Some castings with special requirements are considered as one batch for
one or several pieces.
8.2 Chemical composition
The supplier shall conduct chemical composition analysis on the selected batches; the purchaser
shall conduct chemical composition analysis on the product batches.
8.3 Mechanical properties
8.3.1 For the tensile property test, one tensile specimen shall be taken from each batch.
8.3.2 Test results that do not meet the requirements due to the following reasons are invalid:
a) Improper specimen installation or malfunction of the testing machine;
b) The tensile specimen breaks outside the gauge length;
c) Improper specimen processing;
d) The specimen has casting defects.
At this time, the mechanical property test shall be repeated in accordance with the provisions
of 8.3.1.
8.3.3 The test location and frequency of the Brinell hardness test shall be carried out according
to the requirements of the purchaser.
8.4 Reinspection
8.4.1 When the mechanical property test results do not meet the requirements and are not caused
by the reasons listed in 8.3.2, the supplier may reinspect.
8.4.2 Take two spare tensile specimens from the same batch for testing. If both test results meet
GB/T 8492-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.80
CCS J 31
Replacing GB/T 8492-2014
Heat-Resistant Cast Steels and Alloys for General
Applications
(ISO 11973:2023, MOD)
ISSUED ON: APRIL 25, 2024
IMPLEMENTED ON: APRIL 25, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 8
4 General Delivery Conditions ... 8
5 Manufacturing Process ... 8
6 Technical Requirements ... 9
7 Test Methods ... 15
8 Inspection Rules ... 17
9 Marking, Quality Certificate, Packaging, Storage and Transportation ... 18
Appendix A (Informative) Structural Changes between this Document and ISO
11973:2023 ... 20
Appendix B (Informative) Technical Differences and Their Causes between
This Document and ISO 11973:2023 ... 21
Appendix C (Informative) Designation Comparison between This Document
and ISO11973:2023 and UNS ... 23
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1: Rules for the Structure and Drafting of Standardizing Documents.
This Document replaced GB/T 8492-2014 Heat-Resistant Steel and Alloy Castings for General
Applications. Compared with GB/T 8492-2014, the major technical changes of this Document
are as follows besides the structural adjustments and editorial modifications:
a) Add the definitions of "major defect" and "welding groove for cast defect" (see Clause 3
of this Edition);
b) Add general delivery conditions (see Clause 4 of this Edition);
c) Add manufacturing process (see Clause 5 of this Edition);
d) Change the requirements for welding (see 5.4 of this Edition; 3.9 and Appendix A of the
2014 Edition);
e) Change the chemical compositions of some designations (see Table 1 of this Edition;
Table 1 of the 2014 Edition);
f) Change the internal quality requirements (see 6.4 of this Edition; 3.7 of the 2014 Edition);
g) Change the provisions of single casting test blocks (see 7.2.1.2 of this Edition; 4.2.1.2 of
the 2014 Edition);
h) Change the marking, quality certificate, packaging, storage and transportation (see Clause
9 of this Edition; Clause 6 of the 2014 Edition);
i) Delete "inspection procedures" and "inspection locations" (see 5.1 and 5.2 of the 2014
Edition).
This Document modified and adopted ISO 11973:2023 Heat-Resistant Cast Steels and Alloys
for General Applications.
Compared with ISO 11973:2023, this Document made more structural adjustments. See
Appendix A for a comparison of changes in the structure numbers between the two documents.
Compared with ISO 11973:2023, this Document has many technical differences, which are
marked with a vertical single line (|) in the outer margin of the relevant clauses. A list of these
technical differences and their causes is given in Appendix B.
This Document also made the following editorial modifications:
--- Change the designations in ISO 11973:2023; and replace it with the corresponding
Heat-Resistant Cast Steels and Alloys for General
Applications
1 Scope
This Document specifies the manufacturing, technical requirements, test methods, inspection
rules and marking, quality certificates, packaging, storage and transportation of heat-resistant
steels and alloy castings for general applications.
This Document is applicable to heat-resistant steels and alloy castings for general applications
used under high-temperature working conditions. Other types of heat-resistant steels and alloy
castings can also be implemented as a reference.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 222 Permissible tolerances for chemical composition of steel products
GB/T 223.3 Methods for chemical analysis of iron, steel and alloy - The diantipyryl
methane phosphomolybdate gravimetric method for the determination of phosphorus
content
GB/T 223.11 Iron, steel and alloy - Determination of chromium content - Visual titration
or potentiometric titration method
GB/T 223.20 Methods for chemical analysis of iron steel and alloy - The Potentiometric
titration method for the determination of cobalt content
GB/T 223.21 Methods for chemical analysis of iron steel and alloy - The 5-Cl-PADAB
spectrophotometric method for the determination of cobalt content
GB/T 223.22 Methods for chemical analysis of iron, steel and alloy - The nitroso-R-salt
spectrophotometric method for the determination of cobalt content
GB/T 223.23 Iron, Steel and Alloy-Determination of Nickel Content - The
Dimethylglyoxime Spectrophotometric Method
7.2.1.3 The sampling position of the attached casting test blocks shall be determined by the
purchaser; and the shape and size of the test blocks shall be determined by the supplier. If heat
treatment is required, the attached casting test blocks are allowed to be cut with appropriate
gaps before heat treatment, but a 10 mm to 30 mm gap shall be left to connect to the main body.
The test blocks shall not be separated from the castings before the final performance heat
treatment of the castings.
7.2.2 Tensile properties
The tensile test at...