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ASTM A939-07

Current Revision

Standard Test Method for Ultrasonic Examination from Bored Surfaces of Cylindrical Forgings

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1.1 This practice covers a basic procedure of ultrasonically inspecting cylindrical forgings with bores from the bore surface.

1.2 This practice applies to the manual testing mode. It does not restrict the use of other testing modes, such as mechanized or automated.

1.3 This practice applies to cylindrical forgings having bore sizes equal to or greater than 2.5 in. (63.5 mm).

1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversion to SI units that are provided for information only and are not considered standard.

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.


This practice shall be used when ultrasonic inspection from the bore surface is required by the order or specification for inspection purposes in which the acceptance of the forging is based on limitations of the number, amplitude, or location of discontinuities or a combination thereof, which leads to ultrasonic indications.

The acceptance criteria shall be stated clearly as order requirements.

This practice specifies dual search units, which depending on the angle, are sensitive only to 2 to 3 in. into the metal from the bore surface.

SDO ASTM: ASTM International
Document Number A939
Publication Date May 1, 2007
Language en - English
Page Count 2
Revision Level 07
Supercedes
Committee A01.06
Publish Date Document Id Type View
May 1, 2007 A0939-07 Revision
Sept. 10, 1996 A0939-96 Revision
May 1, 2012 A0939-07R12 Reaffirmation
March 1, 2006 A0939-96R06 Reaffirmation
Sept. 10, 1996 A0939-96R01 Reaffirmation