ASTM-A939 › Historical Revision Information
Standard Practice for Ultrasonic Examination from Bored Surfaces of Cylindrical Forgings
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Scope
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.
Significance and 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.
Keywords
bore inspection; bored turbine rotor; forgings; ultrasonic examination; ICS Number Code 77.140.85 (Iron and steel forgings)
To find similar documents by ASTM Volume:
01.05 (Steel--Bars, Forgings, Bearing, Chain, Tool)
To find similar documents by classification:
77.140.85 (Iron and steel forgings)
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Document Number
ASTM-A939-07
Revision Level
2007 EDITION
Status
Superseded
Modification Type
Revision with Title Change
Publication Date
May 1, 2007
Document Type
Test Method
Page Count
2 pages
Committee Number
A01.06