Standard Test Method for
Ultrasonic Examination from Bored Surfaces of Cylindrical
This standard is issued under the fixed designation A 939; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
click below Astm A 939 – 96 (Reapproved 2001) pdf free download
click here Astm A 938 – 97 (Reapproved 2003) pdf free download