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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NOTE 3—It has been found with some materials that this level of? Standard Test Method f Certification Formally confirming that your products and services meet all trusted external and internal standards. The temperature range may be extended depending upon the instrumentation and calibration materials used.

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

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. This test method uses a smaller specimen and substantially different apparatus than Test Methods E and D The temperature range may be extended depending upon the instrumentation and calibration materials used.

Material Testing Coefficient of Expansion,? The observed expansion must be corrected for the difference in expansion between the specimen holder and probe obtained from a blank run in which no sample or a specimen of the material of construction of the probe is run.

E Terminology Relating to Thermophysical Properties. The last approved version of this historical standard is referenced on www. Where some heat or mechanical treatment is applied to the specimen prior to test, this should be noted in the report.

The temperature range may be extended depending upon the instrumentation and calibration materials used. Alternatively, a dilatometer can be used. Such heat treatment must be included in the report. Your comments asfm invited either for revision of this standard or for additional standards and s831 be addressed to ASTM International Headquarters.

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Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Related information can be found in Refs. For the TMA, the test specimen should be between 2 and 10 mm.

This test can be used for design purposes and to determine if failure by thermal stress astn occur. The height is measured by the probe. Need help or have a question? The test method may be used at lower or negative expansion levels with decreased accuracy and precision see Section This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?

High heating aatm, large specimen sizes, and low specimen thermal conductivity may lead to large specimen temperature gradients. Depending on the compressibility of the specimen and the temperature range to be investigated, a force of between 1 and mN 0. In a TMA, the specimen is placed in the holder at room temperature. Linear Thermal Expansion is used to determine the rate at which a material expands as a function of temperature.

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. Maximum imprecision in the calculated coefficient of linear thermal expansion may be estimated from the imprecisions in the individual f831 by the following equation.

The actual incremental force, mass, or stress above adtm required to make contact with zero force shall be noted in the report.

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Users of this test method are expressly advised that all such instruments or techniques may not be equivalent. The coefficient of linear thermal expansion can be calculated from these recorded data.

NOTE 7—For best results, specimen temperature gradients should be small. Users of this test method are expressly advised that all such instruments or techniques may not be equivalent.

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

Active view current version of standard. E — 06 ambient temperature, accompanying a unit change in temperature identi? Retest of a specimen may be used only as reference and shall not be treated as an independent test of a new specimen. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

A graph is produced. The measured DL for the specimen should normally be corrected for this instrument baseline, especially for low expansion specimens. Due to copyright restrictions, we are not able to provide copies of standards.

Place the specimen temperature sensor in contact with the specimen or as near to the specimen as possible. The effects of specimen temperature gradients may w831 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. The test method may be used at lower or negative expansion levels with decreased accuracy and precision see Section.