This standard is issued under the fixed designation A /A M; the number 1 This practice is under the jurisdiction of ASTM Committee A01 on Steel. ASTM AAM_冶金/矿山/地质_工程科技_专业资料。ASTM A AM 碳钢、低合金钢和马氏体不锈钢铸件超声波检验操作. the original A /A M practice and requires calibration using a ASTM Standards: Procedure—When this procedure is to be applied to an inquiry.
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The area of the location, for the purpose of this evaluation, shall be considered the area that is con? Machined surfaces shall be acceptance inspected as soon as possible after machining. ASTM does not give any warranty express or implied or asrm any representation that the contents of this abstract are accurate, complete or up to date.
Nominal Production Material Thickness tin. If gain is added and back echo is achieved without indication percent amplitude exceeding the 0.
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B Each indication that equals or exceeds the 0. Procedure B requires calibration using a back wall reflection from a series of solid calibration blocks. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Whenever no discernible surface tracing is possible, each indication which equals or exceeds the 0. Repair welds may be inspected before the postweld heat treatment.
Draw a curve through these marks on the screen or on suitable graph paper. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. This test method deals with the procedures for the standard practice of performing pulse-echo ultrasonic examination of heat-treated carbon, low-alloy, and martensitic stainless steel castings by the longitudinal-beam technique.
NOTE 1—Ultrasonic examination and radiography are not directly comparable. They require external attenuators. Current edition approved May 1, Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
Additional Transducer Evaluation Your comments will receive careful consideration at a meeting of the astj technical committee, which you may attend.
The point of marking shall be the center of the search unit. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to axtm its use and application. NOTE 2—For block sizes over 3 in.
ASTM A609/A609M – 12(2018)
Linearity shall be determined in accordance with Practice E or equivalent electronic means. NOTE 2— Areas shall be measured from the center of the search unit. Where the distance between indications is less than the lowest dimension of the largest indication in the group, the cluster shall be repair welded. NOTE 2— The 3? The maximum signal amplitude for the asmt blocks used shall peak at approximately three-fourths of the screen height above the sweep by use a60 the attenuator.
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Permission rights to photocopy the standard may also be secured from the ASTM website www. Based on the signals-to-noise ratio of the response pattern of the casting, a frequency in the range from 0.
Originally approved in A number in parentheses indicates the year of last reapproval. Increase the inspection sensitivity by a factor of three times 10 dB gain with the calibrated attenuator.
NOTE 3—Hole shall be plugged following checking for ultrasonic response.
Search units shall have a frequency of 0. Ultrasonic Testing Quality Level 1 2 3 4 5 6 7 Area, in. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. NOTE 3—In certain castings, because of very long test distances or curvature of the test surface, the casting surface area over which a given discontinuity is detected may be considerably larger or smaller than the actual area of the discontinuity in the casting; in such cases a graphic plot that incorporates a consideration of beam asfm should be used for realistic evaluation of the discontinuity.
Next, select the test block whose overall length, C Fig. It also provides supplementary requirements for angle beam testing.
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. Clustered indications shall not exceed the limits of the quality level designated a6099 the customer purchase order in Table 4. NOTE 2—The attenuator or calibrated gain control may be used to change the signal amplitude during examination to permit small amplitude signals to be more readily detected.
Grid numbers shall be stenciled on a09 casting for record purposes and for grid area identity. At some locations within the limits of the indication, the signal may be less than the reference line, but nevertheless still present such that it may be judged as a continuous, signal indication.
Therefore, it is impractical to specify an ultrasonic quality level that would be universally applicable to such a diversity of products. The same couplant shall be used for calibrations and examinations. All other types of rejectable indications shall be completely removed.