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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A question on ASTM A
Other couplants may be used when agreed upon between the purchaser and supplier. Ultrasonic examination and radiography are not directly comparable.
Still other instruments do not have calibrated gains or attenuators.
It is not necessary that the ultrasonic signal exceed the amplitude reference line over the entire area. NOTE 4—Counter bore shall be 1? NOTE 2—For block sizes over 3 in. This standard has been approved for use by agencies of the Department of Defense. The instrument to be used for examination shall be the ultrasonic, pulsed, reflection type. The point of marking shall be the a6009 of the search unit.
It also provides supplementary requirements for angle beam testing.
The area of the location, for the purpose of this evaluation, shall be considered the area that is con? 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. Asrm completely delineate the indication, draw a line around the outer boundary of the center of the number of marks to form the indication area.
Personnel and equipment qualifications, materials preparation, casting and test conditions, data recording methods, and the acceptance standards for both types of testing procedure are all detailed thoroughly.
This abstract is a brief summary of the referenced standard. BoxArlingate Ln. NOTE 3—Hole shall be plugged following checking for ultrasonic response. C The indications within a cluster with the cumulative areas traced shall be dispersed in a wstm surface area of the casting equal to 36 in.
Machined surfaces shall be acceptance inspected as soon as possible after machining. The same couplant shall be used for calibrations and examinations. When section thicknesses over 15 in. Transducers shall be utilized at their rated frequencies. Linearity shall be determined in accordance with Practice E or equivalent electronic means.
For a material thickness greater than 3 in. Repair welds may be inspected before the postweld heat treatment.
Procedure B requires calibration using a back wall reflection from a series of solid calibration blocks. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete qstm up to date. This will be the reference line for reporting discontinuity amplitudes. Other instruments have decibel calibrated attenuators, in which case the required decibel must be removed.
Link to Active This link will always route to the current Active version of the standard. Ultrasonic acceptance or rejection criteria for individual qstm should be based on a realistic appraisal of service requirements and the quality that can normally be obtained in production of the particular type of casting. NOTE 5—In certain castings, because of very long metal path distances or curvature of the examination surfaces, the surface area over which a given discontinuity is detected may be considerably larger or smaller than the a6009 area of the discontinuity in the casting; in such cases, other criteria that incorporate a consideration of beam angles or zstm spread must be used for realistic evaluation of the discontinuity.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. The supplementary requirements shall apply only when specified individually by the purchaser a60 the purchase order or contract.
ASTM A609/A609M – 12(2018)
Next, select the test block whose overall length, C Fig. Clustered indications shall not exceed the limits of the quality level designated by the customer purchase order in Table 4. All other types of rejectable indications shall be completely removed. When grids are laid out on the casting surface and they encompass different quality levels, each speci? It is the asttm of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Additional Transducer Evaluation Therefore, it is impractical to ast an ultrasonic quality level a6099 would be universally applicable to such a diversity of products. NOTE 2— The 3? They require external attenuators. Increase the inspection sensitivity by a factor of three times 10 satm gain with the calibrated attenuator. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. NOTE 1—Ultrasonic examination and radiography are not directly comparable.
If gain is added and back echo is achieved without indication percent amplitude exceeding the 0. Current edition approved May 1, An isolated indication may be de? Block fabricated with a 2-in.