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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Link to Active This link will always route to the current Active version of the standard. Unless effects of moisture are to be studied, use of dry purge gas is recommended and is essential for operation at subambient temperatures.

Other lengths may be used, but shall be noted in the report. Precision and Bias 6 Send us a request Wilton UK: NOTE 3—It has been found with some materials that this level of? Specimens that do not meet these requirements may result in increased imprecision.

An abrupt change in slope of the expansion curve indicates a transition of the material from one state to another. Other heating rates may be used but shall be noted in the report. Current zstm approved March 15, Due to copyright restrictions, we are not able to provide copies of standards.

The measured DL for the specimen should normally be corrected for this instrument baseline, especially for low expansion specimens. The furnace is raised and the temperature is brought to 20 degrees below the lowest temperature of interest.

The specimen is placed in the Dilatometer at room temperature, and the height gauge is positioned and zeroed. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

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Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. 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.

High heating rates, large specimen sizes, and low specimen thermal conductivity may lead to large specimen temperature gradients. It is the responsibility of the user of this standard to establish appro- This test method is under the jurisdiction of ASTM Committee E37 on Thermal Measurements and is the direct responsibility of Subcommittee E This test method uses a smaller specimen and substantially different apparatus than Test Methods E and D A graph is produced.

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

Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. NOTE 6—Normally, the expansion increases with the increase in temperature as shown in the schematic diagram of Fig.

The height is measured by the probe. Depending on the compressibility of the specimen and the temperature range to be e8311, a force of between 1 and mN 0.

Maximum imprecision in the calculated coefficient of linear thermal expansion may be estimated from the imprecisions in the individual measurements by the following equation. Users of this test method are expressly advised that all such instruments or techniques s831 not be equivalent. Standards can be obtained from appropriate standards authorities. No further satm authorized. E Terminology Relating to Thermophysical Properties.

NOTE 4—Some materials, particularly composites, may require heat treatment to condition the specimen prior to test to relieve stresses or distortions.

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

Link to Active This link will always route to the current Active version of the standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Certification Formally confirming that your products and services meet all trusted external and internal standards. Active view current version of standard. The test method may be used at lower or negative expansion levels with decreased accuracy and precision see Section The test method may be used at lower or negative expansion levels with decreased accuracy and precision see Section.

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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. The temperature range may be extended depending upon the instrumentation and calibration materials used. Work Item s – proposed revisions of this standard. Auditing Consulting Sourcing Training. Formally confirming that your products and services meet all trusted external and internal standards.

It is the responsibility of the user to determine the necessary equivalency prior to use. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Note 1 Users of this test method are expressly advised that all such instruments or techniques may not be equivalent.

The refrigerant used for cooling shall not come into direct contact with the specimen. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.