ASTM E831 PDF

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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Related information can be found in Refs. Retest of a specimen may be used only as reference and shall not be treated as an independent test of a new ast. Users of this test method are expressly advised that all such instruments or techniques may not be awtm. 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.

Work Item s – proposed revisions of this standard. Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards.

Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. This test can be used for design purposes and to determine if failure by thermal stress may occur. Validating the specifications, value and safety of your raw materials, products and assets.

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Standards can be obtained from appropriate standards authorities.

Coefficient of Linear Thermal Expansion ASTM E831, ASTM D696, ISO 11359

The test method may be used at lower or negative expansion levels with decreased accuracy and precision see Section. The specimen must be flat on both ends.

A graph is w831. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Related information can be found in Refs.

The height is measured by the probe. Summary of Test Method 4. The specimen is placed in the Dilatometer at room temperature, and the height gauge is positioned and zeroed. The temperature range may be extended depending upon the instrumentation and calibration materials used. Such heat treatment must be included in the report. Material Testing Coefficient of Expansion,? Inspection Validating asrm specifications, value and safety of your raw materials, products and assets.

e8311 A number in parentheses indicates the year of last reapproval. It is the responsibility of the user to determine the necessary equivalency prior to use. Place the specimen temperature sensor in contact with the specimen or as near to the specimen as possible. In a TMA, the specimen is placed in the holder at room temperature. High heating rates, large specimen sizes, and low specimen thermal conductivity may lead to large specimen temperature gradients.

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.

Precision and Bias 6 An abrupt change in slope of the expansion curve indicates a transition of the material from one state to another. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any asfm mentioned in this standard.

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The am shall not be calculated from a temperature range in which a transition point is noted. Maximum imprecision in the calculated coefficient of linear thermal expansion may be estimated from the imprecisions in the individual measurements by the following equation. It is the responsibility of the user to determine the necessary equivalency prior to use.

ASTM E Linear Thermal Expansion of Solid Materials by Thermomechanical Analysis_百度文库

The test method may be used at lower or negative expansion levels with decreased accuracy and precision see Section Influence of thermal a For the TMA, the test specimen should be between 2 and 10 mm. Link to Active This link will always route to the current Active version of the standard. It is the responsibility of aetm user of this standard to establish appro- This test method is under asfm jurisdiction of ASTM Committee E37 on Thermal Measurements and is the direct responsibility of Subcommittee E Certification Formally confirming that your products and services meet all trusted external and internal standards.

Last previous edition approved in as E — Specimens that do not meet these requirements may result in increased imprecision. Global Reach Intertek is the industry leader with over 42, people satm 1, locations in over countries.