ASTM A418 / A418M - 10

    Standard Practice for Ultrasonic Examination of Turbine and Generator Steel Rotor Forgings

    Active Standard ASTM A418 / A418M | Developed by Subcommittee: A01.06

    Book of Standards Volume: 01.05


    Buy Standard (PDF)
    8 pages
    $42.00
    Buy Standard (Print)
    8 pages
    $42.00
    Buy Standard + Redline (PDF)
    16 pages
    $50.40

    Historical (view previous versions of standard)


    ASTM A418 / A418M

    Significance and Use

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

    The acceptance criteria shall be clearly stated as order requirements.

    1. Scope

    1.1 This practice for ultrasonic examination covers turbine and generator steel rotor forgings covered by Specifications A469/A469M, A470/A470M, A768/A768M, and A940/A940M. This standard shall be used for contact testing only.

    1.2 This practice describes a basic procedure of ultrasonically inspecting turbine and generator rotor forgings. It does not restrict the use of other ultrasonic methods such as reference block calibrations when required by the applicable procurement documents nor is it intended to restrict the use of new and improved ultrasonic test equipment and methods as they are developed.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    A469/A469M Specification for Vacuum-Treated Steel Forgings for Generator Rotors

    A470/A470M Specification for Vacuum-Treated Carbon and Alloy Steel Forgings for Turbine Rotors and Shafts

    A768/A768M Specification for Vacuum-Treated 12 % Chromium Alloy Steel Forgings for Turbine Rotors and Shafts

    A940/A940M Specification for Vacuum Treated Steel Forgings, Alloy, Differentially Heat Treated, for Turbine Rotors

    E317 Practice for Evaluating Performance Characteristics of Ultrasonic Pulse-Echo Testing Instruments and Systems without the Use of Electronic Measurement Instruments

    E1065 Guide for Evaluating Characteristics of Ultrasonic Search Units

    Other Standards

    RecommendedPracticeN Personnel Qualification and Certification in Nondestructive Testing Available from American Society for Nondestructive Testing, PO Box 28518, 1711 Arlingate Lane, Columbus, OH 43228.


    ICS Code

    ICS Number Code 77.040.20 (Non-destructive testing of metals); 77.140.85 (Iron and steel forgings)

    UNSPSC Code

    UNSPSC Code 31132100(Steel forgings)


    DOI: 10.1520/A0418_A0418M-10

    ASTM International is a member of CrossRef.

    ASTM A418 / A418M

    Citing ASTM Standards
    Back to Top