ASTM E831 PDF
Coefficient of Linear Thermal Expansion by TMA or Dilatometer ASTM E, ASTM D, ISO Scope: Linear Thermal Expansion is used to determine . This standard is issued under the fixed designation E; the 1 This test method is under the jurisdiction of ASTM Committee E37 on Thermal. ASTM E Linear Thermal Expansion of Solid Materials by Thermomechanical Analysis_机械/仪表_工程科技_专业资料。Designation: E
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Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. An abrupt change in slope of the expansion curve indicates a transition of the material from one state to another.
E Terminology Relating to Thermophysical Properties. Inspection Validating the specifications, value and safety of your raw materials, products and assets. A graph is produced. The temperature range may be extended depending upon the instrumentation and calibration materials used. Linear Thermal Expansion is used to determine the rate at which a material expands as a function of temperature.
The coefficient of linear thermal expansion is calculated between the desired temperature ranges. NOTE 5—Direct readout of zero position and specimen length using the analyzer sensing element, where available, with a sufficient range has been found to be an accurate means of length determination.
Such heat treatment must be included in the report. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Summary of Test Method 4. E8831 specimen is heated at a specified rate, often ten degrees a minute, over the desired temperature range.
Through our network of over 43, people in 1, laboratories and offices in countries, Intertek provides quality and safety solutions to a wide range of industries around the world. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. The coefficient of linear thermal expansion can be calculated from these recorded data.
Users of this test method are expressly advised that all such instruments or techniques may not be equivalent. Testing Evaluating how your products and services meet and sstm quality, safety, sustainability and performance standards. Work Item s – proposed revisions of this standard. The temperature range may be extended depending upon the instrumentation and calibration materials used.
In a TMA, the specimen is placed in the holder at room temperature.
Coefficient of Linear Thermal Expansion ASTM E, ASTM D, ISO
Maximum imprecision in the calculated coefficient of linear thermal expansion may be estimated from the imprecisions in asym individual measurements by the following equation. Note 1 Users of this test method are expressly advised that all such instruments or techniques may not be equivalent.
Material Testing Coefficient of Expansion,? A number in parentheses indicates the year of last reapproval. Active view current version of standard. The effects of specimen temperature gradients may be compensated for by correction found through the use of suitable reference materials whose size and thermal conductivity are close to that of the test specimen.
Coefficient of Linear Thermal Expansion ASTM E831, ASTM D696, ISO 11359
Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Retest of a specimen may be used only as reference and shall not be treated as e813 independent test of a new specimen. Users of this test method are expressly advised that all such instruments or techniques may not be equivalent. For the dilatometer, the test sample should be approximately The specimen is placed in the Dilatometer at room temperature, and the height gauge is positioned and zeroed.
Where some heat or mechanical treatment is applied to the specimen prior to test, this should be noted in the report. Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards.
It is the responsibility of the user to determine the necessary equivalency prior to use. E Terminology Relating to Thermophysical Properties. The test method may be used qstm lower or negative expansion levels with decreased accuracy and precision see Section Coefficient of Linear Thermal Expansion Video Learn more about linear thermal expansion in this video. Unless effects of moisture are to be studied, use of dry purge gas is recommended and is essential for operation at subambient temperatures.
E — 06 is adequate. Related information can be found in E813. Place the specimen temperature sensor in contact with the specimen or as near to the specimen as possible. Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. It is the responsibility of the user of this standard to establish appropriate safety and aztm practices and determine the applicability of regulatory limitations prior ast, use. Other lengths may be used, but shall be noted in the report.
ASTM E Linear Thermal Expansion of Solid Materials by Thermomechanical Analysis_百度文库
NOTE 1—Users of this test method are expressly advised that all such instruments or techniques may not be equivalent.
This test method uses a smaller adtm and substantially different apparatus than Test Methods E and D NOTE 4—Some materials, particularly composites, may require heat treatment to condition the specimen prior to test to relieve stresses or distortions.
For the TMA, the test specimen should be between 2 and 10 mm. Last previous edition approved in as E — No further reproductions authorized.
Formally confirming that your products and services meet all trusted external and internal standards. Link to Active This link will always route to the current Active version of the standard. The furnace is raised and the temperature is brought to 20 degrees below the lowest temperature of interest.