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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Work Item s – proposed revisions of this standard. Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Note 1 Users of this test method are expressly advised that all such instruments or techniques may not be equivalent.

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. Atm can be obtained from appropriate standards authorities.

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. The coefficient of linear thermal expansion is calculated between the desired temperature ranges.

The refrigerant used for cooling shall not come into direct contact with the specimen. Maximum imprecision in the calculated coefficient of linear thermal expansion may be estimated from the imprecisions in the individual measurements by the following equation. The temperature range may be extended depending upon the instrumentation and calibration materials used. An abrupt change in slope of the expansion curve indicates a transition of the material from one state to another.

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The temperature range may be extended depending upon the instrumentation and calibration materials used. NOTE 7—For best results, specimen temperature gradients should be small. Unless effects of moisture are to be studied, use of dry purge gas is recommended and is essential for operation at subambient temperatures. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?

Whether your business is local or global, we can ensure your products meet quality, health, environmental, safety, and social accountability standards for virtually any market around the world. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

The coefficient of linear thermal expansion can be calculated from these recorded data.

Coefficient of Linear Thermal Expansion ASTM E, ASTM D, ISO

Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

Active view current version of standard. The specimen is placed in the Dilatometer at room temperature, and the height gauge is positioned and zeroed. Need help or have a question? Lateral dimensions shall not exceed 10 mm. Where some heat or mechanical treatment is applied to the specimen prior to test, axtm should asmt noted in the report.

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A number in parentheses ast the year of last reapproval. Certification Formally confirming that your products and services meet all trusted external and internal standards. Other heating rates may be used but shall be noted in the report. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

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

Specimens that do not meet these requirements may result in increased imprecision. Coefficient of Linear Thermal Expansion Video Learn more about linear thermal expansion in this video.

Last previous edition approved in as E — No further reproductions authorized. 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. It is the responsibility of the user to determine the aatm equivalency prior to use. The furnace is raised and the temperature is brought to 20 degrees below the lowest temperature of interest.