ASTM A991 PDF

ASTM A – Designation: A /A M – 98 (Reapproved ) Standard Test Method for Conducti. Purchase your copy of ASTM A/AM – 17 as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards. This standard is issued under the fixed designation A/AM; the number This test method is under the jurisdiction of ASTM Committee A01 on Steel, 2.

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A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval.

This method is used to determine the capability of the furnace to meet the permissible temperature variation speci? Survey documentation requirements, and the procedure used to subsequently establish the furnace working zone, are de? The acceptance of any such additional requirements shall be dependent on negotiations with the supplier and must be included in the order as agreed upon by the purchaser and supplier.

Within the aztm, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system is to be used independently of the other, without combining values in any way.

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.

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Current edition approved Oct. Originally approved in AMS Pyrometry3 3. Regardless of heat treat furnace type, or processing cycle, it may be necessary for users to know the temperature uniformity in the furnace and whether the material is processed in a zone within the furnace that is capable of meeting the applicable permissible temperature variation requirements.

Furnace Survey Equipment 5. Calibration to such national standards shall be done adtm least once every two years. Use of representative material to w991 product during survey is permitted. A major furnace modi? All other conditions described in 6. Place them at the outer extremities, the center of the proposed working zone, and in areas of suspected variability in the proposed working zone.

ASTM International – Standard References for ASTM A / AM – 17

Attach survey test sensors to, or set them in the load. For proposed working zones greater than, or equal to, 12 in. The rate of conveyance shall be representative of normal operating conditions.

Examples of these surveying techniques are listed below. Details of this procedure shall be as agreed to between purchaser and supplier. It provides validation of temperature uniformity by a series of tests rather than a single test.

In each test, determine the temperature variation pattern at one or more of the test locations.

ASTM A991/A991M – 17

Documentation of Survey Results 8. Starting time and chart speed shall be marked on the original temperature charts, 8. Interpretation of Results and Establishment of the Working Zone 9. Results of the application of this test method shall be expressed as a variation from a temperature set point. The working zone may be comprised of one or more heating zones in the furnace.

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Heat Treatment in the Working Zone Users of this standard are expressly advised that determination of the validity of any such patent axtm, and the risk of infringement of such rights, are entirely their own responsibility.

This standard is subject to revision at atsm time by the responsible technical committee and must be reviewed every?

Your comments are invited aa991 for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. 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. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

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