GB/T 5482-2023Metallic materials—Dynamic tear test method (English PDF)
金属材料 动态撕裂试验方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
August 6, 2023
Implementation date
March 1, 2024
Scope
GB/T 5482-2023 is the English-translated version of 金属材料 动态撕裂试验方法.
GB/T 5482-2023 is the Chinese national dynamic tear test method for metallic materials.
It specifies the specimens and their preparation, the testing machine, the test procedure, the calculation of the shear section ratio, the processing of results and the test report, and defines the shear section ratio as the fibrous fracture area as a percentage of the original cross-section at the notch.
Its contents list adds appendices on sampling welded joint specimens, on specimens 25 mm thick or more, and on pressing and measuring the notch. Clause 1 makes it suitable for measuring the dynamic tear energy and shear section ratio of metallic materials or welded joint specimens with a Rockwell hardness value less than 36 HRC.
It replaces GB/T 5482-2007, was issued on 6 August 2023 and has applied since 1 March 2024.
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Document preview — GB/T 5482-2023
National Standard of the People's Republic of China
- ICS
- 77.040.10
- Classification
- H 22
- Replacing
- GB/T 5482-2007
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- PrefaceI
- 1 Scope
- 2 Normative reference documents
- 3 Terms and Definitions
- 4 Samples and their preparation
- 5 Testing machine
- 6 Test procedure
- 7 Calculation of shear section ratio
- 8 Test result processing
- 9 test report
- Appendix A (Normative) Sampling Method for Welded Joint Samples
- Appendix B (informative) Dynamic tear specimens with a thickness greater than or equal to 25mm and their requirements for testing machines
- Appendix C (informative) Pressing of the notched top of the specimen
- Appendix D (informative) Measurement of specimen notch pressing depth
- Reference
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.
This document replaces GB/T 5482-2007 "Dynamic Tear Test Method for Metallic Materials". Compared with GB/T 5482-2007, except for the structure In addition to adjustments and editorial changes, the main technical changes are as follows.
a) Change the term "fiber section ratio" to "shear section ratio" (see 3.4, 2007 version of 3.4);
b) Added processing accuracy requirements for specimens using end positioning tests (see 4.2.1);
c) The regulations on the reading resolution of testing machines have been changed, and the reading resolution of testing machines with a maximum impact energy value of 3000J and above has been added. Regulations (see Table 3, Table 2 of the 2007 edition);
d) The test process has been changed and improved (see 6.1, 6.2, 6.1, 6.3 of the 2007 edition);
e) Delete the requirements for temperature measurement instruments (see 6.2 of the 2007 edition);
f) The requirement for the number of specimens is deleted (see 6.6 of the 2007 edition);
g) Added a computer-aided method for measuring shear section ratio (see 7.1.2).
1 Scope
This document specifies the specimens for dynamic tear testing of metallic materials and their preparation, testing machines, testing procedures, calculation of shear section ratio, and testing Results processing and test reporting.
This document is suitable for measuring the dynamic tearing energy and shear fracture of metallic materials or welded joint samples with a Rockwell hardness value less than 36HRC. face rate.
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.
GB/T 2975 Sampling location and sample preparation for mechanical property testing of steel and steel products
GB/T 3808 Inspection of Pendulum Impact Testing Machine
JJG145 Pendulum Impact Testing Machine Calibration Regulations
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Dynamic tear test
On the impact testing machine, the dynamic tearing specimen in the state of a simply supported beam is punched once, and its energy absorption and shear section ratio are measured. test.
3.2 Dynamic tear energy
The energy absorbed by the sample during the dynamic tear test is used to characterize the ability of a metal material of a specific thickness to resist dynamic tearing.
3.3 fracture surface
The fracture surface of the dynamic tear specimen after punching.
Note. Macroscopically, the fracture surface of the sample generally has a crystalline, fibrous (including shear lip) or mixed morphology.
3.4 shear section ratio
The percentage of the ratio of the fibrous fracture area to the original cross-sectional area at the notch of the specimen.
4 Samples and their preparation
4.1 Sampling
4.1.1 The cutting position and direction of the sample blank should comply with the requirements for impact specimens in GB/T 2975 or relevant product technical requirements and specifications.
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Similar standards
Editions of GB/T 5482
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 5482-2023 | Metallic materials—Dynamic tear test method | current edition | Current |
| GB/T 5482-2007 | Metallic materials—Dynamic tear test method | previous edition | Superseded |
This page sells the current edition, GB/T 5482-2023. Earlier editions are listed for reference only.
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