ASTM A939-96

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

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

1.3 This test method 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 the standard. The values given in parentheses are for information only.

1.5 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.