GB/T 8364-2008Test methods of thermal flexure of thermostat metals (English PDF)
热双金属热弯曲试验方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
August 19, 2008
Implementation date
April 1, 2009
Scope
GB/T 8364-2008 is the English-translated version of 热双金属热弯曲试验方法.
GB/T 8364-2008 specifies the basic principles, the measuring device, the preparation of the specimen and its requirements, the test procedure and the calculation of the results, the test report and the error and accuracy for measuring the thermal flexure of thermostat metals, which the draft calls thermal bimetal.
Clause 1 states that the standard brings together three test methods, which the draft names in its own wording as the thermal bimetal than bending test, the thermal bimetal temperature curvature test and the thermal bimetal bending constant test, and gives the range of each: the first applies to measuring the than bending performance of thermal bimetal strip of 0.60 mm to 1.25 mm thickness over the temperature range 20 degrees C to 130 degrees C, the second to the temperature curvature of straight thermal bimetal strip of 0.30 mm to 1.25 mm thickness and of spiral thermal bimetal of less than 0.30 mm thickness, and the third to the flat bending constant of thermal bimetal strip specimens of 0.25 mm to 1.20 mm thickness over a measured temperature range from room temperature to 100 degrees C. Clause 2, Normative references, cites GB/T 4461 and JB/T 9551.
Clause 3, Thermal bimetallic than bending test method, states in 3.1 that the method uses a cantilever arrangement in which the specimen, the specimen holder, the displacement measuring rod and an electrical contact indicator form a closed loop, so that the displacement of the free end of the specimen, that is its deflection, can be measured as the curvature of the thermal bimetal changes with temperature, and opens its terms and definitions at 3.2.1 with curvature, R-1, described through a narrow strip of thickness delta and length L flat at temperature T0 and bent to radii R1 and R2 at temperatures T1 and T2.
The draft breaks off inside 3.2.1, before the other two test methods and before the appendices, so the page shows nothing further of the body.
The foreword states that the standard merges GB/T 8364-2003, GB/T 5987-1986 and GB/T 5985-2003 into one document and changes the title, that the reference to GB/T 2900.4 and the definition of thermal bimetal were deleted, that the note in 4.4.8 was removed, that the terms common to the three former methods were presented in unified form, that the sum of Y values in Appendix E and the corresponding other results were corrected, and that Appendix A is a normative appendix while Appendix B, Appendix C, Appendix D and Appendix E are informative.
The foreword also states that the standard was proposed by the China Iron and Steel Association and is under the jurisdiction of the National Steel Standardization Technical Committee, and it names GB/T 5985-1986, GB/T 5985-2003, GB/T 5987-1986, GB/T 8364-1987 and GB/T 8364-2003 among the editions previously replaced.
It replaces GB/T 5985-2003, GB/T 5987-1986 and GB/T 8364-2003, was issued on 2008-08-19 and has applied since 2009-04-01.
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Document preview — GB/T 8364-2008
National Standard of the People's Republic of China
- ICS
- 77.040.99
- Classification
- H 21
- Replacing
- GB/T 8364-2003
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword
- 1 Scope
- 2 Normative references
- 3 Thermal bimetallic than bending test method
Foreword
This standard replaces GB/T 8364-2003 "hot bimetallic than bending test method", GB/T 5987-1986 "hot bimetallic temperature curvature test Test methods "and GB/T 5985-2003" thermal bimetal bending constant measurement method. " This standard and GB/T 8364-2003, GB/T 5987-1986 and GB/T 5985-2003 compared to the main changes are as follows.
--- The GB/T 8364-2003, GB/T 5987-1986 and GB/T 5985-2003 three standards into one standard, and The standard name be changed to "heat the bimetal thermal bend test method";
--- The scope of the "hot metal temperature double curvature test method for measuring the thickness of greater than or equal to 0.3mm straight bimetallic strip hot Spiral heat and thickness of less than 0.30mm bimetallic temperature curvature "with" hot bimetallic temperature test method is suitable for measuring the curvature Given thickness of 0.30mm ~ 1.25mm straight bimetal strip heat and thickness of less than 0.30mm spiral heat bimetallic temperature Camber ";
--- Delete references to normative documents GB/T 2900.4;
--- 4.4.8 Remove the "Notes";
--- Delete "hot bimetallic" is defined;
--- Original three test methods on the same terms "temperature measuring device", "bath", "measuring", "Sample preparation and requirements", "test Inspection report "unified presentation;
--- Correct Appendix E Sigma Y values, other results for the corresponding corrections;
--- Unified standard in all significant digits.
Appendix A of this standard is a normative appendix, Appendix B, Appendix C, Appendix D and Appendix E are informative appendices. The standard proposed by China Iron and Steel Association.
1 Scope
This standard specifies the measurement of thermal bimetallic than bending, temperature and curvature constant bending the basic principles of the measuring device, and requirements for preparing the sample, Test procedures and the results of calculations, test reports and accuracy errors. This standard includes a bimetallic than bending, bending curvature and constant temperature test method.
Thermal bimetal bend test than that applied to a thickness of 0.60mm ~ 1.25mm, temperature range 20 °C ~ 130 °C heat the bimetal strip Material than the bending performance measurements. Thermal bimetal flexivity Test methods for the determination of the thickness of 0.30mm ~ 1.25mm straight strip hot Bimetallic and thickness of less than 0.30mm spiral heat bimetallic temperature curvature. Thermal bimetallic constant bending test method for measuring thickness Degree of 0.25mm ~ 1.20mm, the measured temperature range from room temperature to 100 °C heat the bimetal strip specimen flat curved constant.
2 Normative references
The following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard.
GB/T 4461 heat the bimetal strip
JB/T 9551 heat bimetal spiral element heat deflection test method
3 Thermal bimetallic than bending test method
3.1 Measuring principle
Thermal bimetal bending test method than using a cantilever method. From the specimen, specimen holder, displacement measuring rod and electrical contact indicator composition A closed loop (see Fig. 2). According to the basic characteristics of the curvature of the bimetal thermal changes with temperature, the sample displacement measuring rod as close The switching circuit to measure the displacement of the free end of the specimen - deflection changes.
3.2 Terms and Definitions
3.2.1 Curvature
R-1
Thickness delta, a length L of hot narrow strip bimetal at a temperature T0, the flat state, the free end of the centerline position M0. When the temperature is T1 and T2 when the bending radius of curvature R1 and R2, the free end of the centerline, respectively M1 and M2,
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 16 pages — is available in the English PDF.
Referenced standards
Similar standards
Editions of GB/T 8364
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 8364-2008 | Test methods of thermal flexure of thermostat metals | current edition | Current |
| GB/T 8364-2003 | Test methods of thermal flexure of thermostat metals | previous edition | Superseded |
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