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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Clustered indications shall not exceed the limits of the quality level designated by the customer purchase order in Table 4. Rejectable conditions are as follows and when any of the conditions listed below are found, the indications shall be removed and repair welded to the applicable process speci?
If it is not, obtain the best compromise between this block and the largest block of the series of 3 blocks being used for calibration. In order to accomplish this,?
If gain is added and back echo is achieved axtm indication percent amplitude exceeding the 0.
NOTE 2—For block sizes over 3 in. To 6a09 delineate the indication, draw a line around the outer boundary of the center of the number of marks to form the indication area.
They require external attenuators. Permission rights to photocopy the standard may also be secured from the ASTM website www. Draw a curve through these marks on the screen or on suitable graph paper. Additional Transducer Evaluation Repair welds may be inspected before the postweld heat treatment. The area of the location, for the purpose of this evaluation, shall be considered the area that is con?
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. 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 asstm casting; in such cases a graphic plot that incorporates a consideration of beam spread should be used for realistic evaluation of the discontinuity.
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Ultrasonic Testing Quality Level 1 2 3 4 5 6 7 Area, in. Signal evaluation is made by returning the attenuator or calibrated gain control to its original setting. Additional supplemental blocks for testing thickness greater than 10 in. NOTE 2— Areas shall be measured from the center of the search unit. Based on the signals-to-noise ratio of the response pattern of the casting, a frequency in the range from 0.
When grids are laid out on the casting surface and they encompass different quality levels, each speci? The side-drilled hole used for the 1? The point of marking shall be the center of the search unit. 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.
Calibration shall be executed by either flat-bottomed hole or back-wall reflection. 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. C The indications within a cluster with the cumulative areas traced shall be dispersed in a minimum surface area of the casting equal to 36 in.
BoxArlingate Ln. Transducers shall be utilized at a69 rated frequencies. A method should be available to equalize signal response at different depths.
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. Link to Active This link will always route to the current Active version of the standard.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. NOTE 1—Ultrasonic examination and radiography are not directly comparable. Place the search unit on the casting at the transfer point and adjust the instrument gain until the back re? An isolated indication may be de?
Machined surfaces shall be acceptance inspected as soon as possible after machining.
Historical Version s – view previous versions of standard. The same search unit used for calibration shall be used to inspect the casting.
A question on ASTM A
The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Ultrasonic examination and radiography are not directly comparable. In order to avoid time loss in production, acceptance inspection of cast surfaces may be done prior to machining.
Use a machined calibration block for machined surfaces. It also provides supplementary requirements for angle beam testing. If a procedure is not speci? Whenever no discernible surface tracing is possible, each indication which equals or exceeds the 0.
The supplementary requirements shall apply only when specified individually by the purchaser in the purchase order or contract. Ultrasonic acceptance or rejection criteria for individual castings 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. This will be the reference line for reporting discontinuity amplitudes.
ASTM A609/A609M – 12(2018)
This standard has been approved for use by agencies of the Department of Defense. Referenced Zstm purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
When section thicknesses over 15 in. The same couplant shall be used for calibrations and examinations. ASTM does not give any warranty express or implied or make any ashm that the contents of this abstract are accurate, complete or up to date. Still other instruments do not have calibrated gains or attenuators.
Approved May 1, The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.