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ASTM-A991:2004 Edition

ASTM-A991:2004 Edition

$35.75

A991/A991M-98(2004) Standard Test Method for Conducting Temperature Uniformity Surveys of Furnaces Used to Heat Treat Steel Products

Published By Publication Date Number of Pages
ASTM 2004 4
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1.1 This test method covers the procedures used to conduct a temperature uniformity survey on a furnace used to heat treat steel products. 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. Survey documentation requirements, and the procedure used to subsequently establish the furnace working zone, are defined in this test method.

1.2 This test method covers heat treat furnaces in any of the following categories:

1.2.1 Continuous or semi-continuous conveyance furnaces,

1.2.2 Batch furnaces, and

1.2.3 Salt or liquid baths and fluidized beds.

1.3 This test method only applies when specified in the product specification or the purchase order.

1.4 Controlling a heat treatment of steel products using thermocouples attached to the extremities of each load is an alternative to performing a furnace survey.

1.5 By mutual agreement between the purchaser and the supplier of heat treat services, more stringent and/or additional requirements may be specified. 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.

1.6 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, 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.

1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Terminology
2 Significance and Use
Furnace Survey Equipment
Requirements
Procedure
3 Documentation of Survey Results
Interpretation of Results and Establishment of the Working Zone
Heat Treatment in the Working Zone
Keywords

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