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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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.

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.

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

Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. All other conditions described in 6. 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.

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

Use of representative material to simulate product during survey is permitted. Details of this procedure shall be as agreed to between purchaser and supplier. Survey documentation requirements, and the procedure used to subsequently establish the furnace working zone, are de?

Interpretation of Results and Establishment of the Working Zone 9. Heat Treatment in the Working Zone 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. A superscript epsilon e indicates an editorial change since the last revision or reapproval.

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Furnace Survey Equipment 5. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? AMS Pyrometry3 3. Link to Active This link will always route to the current Active version of the standard.

For proposed working zones greater than, or equal to, 12 in. A major furnace modi?

ASTM A991/A991M – 17

Combining values from the two systems may result in non-conformance with the standard. It provides validation of temperature uniformity by a series of tests rather than a single test. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. 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.

Place them at the outer extremities, the center of the proposed working zone, and in areas of suspected variability in the proposed working zone. Results of the application of this test method shall be expressed as a variation from a temperature set point.

Originally approved in Survey documentation requirements, and the procedure used to subsequently establish the furnace working zone, are defined in this test method. The rate of conveyance shall be representative of normal operating conditions.

This method is used to determine the capability of the furnace to meet the permissible temperature variation speci? In each test, determine the temperature variation pattern at one or more of the test locations. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

Examples of these surveying techniques are listed 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. The working zone may be comprised of one or more heating zones in the furnace.

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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.

Documentation of Survey Results 8. A number in parentheses indicates the year of last asttm. Starting time and chart speed shall be marked on the original temperature charts, 8. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Attach survey test sensors to, or set them in the load. 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.

Calibration to such national standards shall be done at least once every two years. Historical Version s – view previous versions of standard. Current edition approved Oct. 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. This method is used to determine the capability of the furnace to meet the permissible temperature variation specified in the applicable product specification, or as agreed to by the purchaser and supplier of heat treat services.

Within the text, the SI units are shown in brackets.