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.
|Published (Last):||25 May 2011|
|PDF File Size:||15.45 Mb|
|ePub File Size:||10.24 Mb|
|Price:||Free* [*Free Regsitration Required]|
The stenciled grid number shall appear in the upper right hand corner of the grid. It is not necessary that the ultrasonic signal exceed the amplitude reference line over the entire area. Whenever no discernible surface tracing is possible, each indication which equals or exceeds the 0.
All other types of rejectable indications shall be completely removed. 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 actual area of the discontinuity in the casting; in such cases, other criteria that incorporate a consideration of beam angles or beam spread must be used for realistic evaluation of the discontinuity.
In order to avoid time loss in production, acceptance inspection of cast surfaces may be done prior to machining.
Current edition approved May 1, 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. Historical Version s – view previous versions of satm. Draw a rectangle or other regular shape through the indication in order to form a690 polygon from which the area may be easily computed.
If they are not, the cluster having the largest single indication shall be removed. Combining values from the two systems may result in nonconformance with the standard. 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. Additional supplemental blocks ashm testing thickness greater than 10 in. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
Combining values from the two systems may result in non-conformance with the standard. This standard is subject to revision at any time by the responsible technical committee and must ashm reviewed every?
Calibration shall be executed by either flat-bottomed hole or back-wall reflection. Rejectable conditions are as follows and when any of the conditions listed below are found, the indications shall be removed and repair welded to satm applicable process speci?
NOTE 1—Ultrasonic examination and radiography are not directly comparable. A number in parentheses indicates the year of last reapproval. Surfaces that do not meet the requirements of 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.
Ultrasonic Testing Quality Level 1 2 3 4 5 6 7 Area, in. A method should be available to equalize signal response at different depths. Repair welds may be inspected before the postweld heat treatment.
This examination technique is intended to complement Guide E94 in the detection of discontinuities. To completely delineate the indication, draw a line around the outer boundary of the center of the number of marks to form the indication area. They may be as cast, blasted, ground, or machined.
The instrument to be used for examination shall be the ultrasonic, pulsed, reflection type. Grid numbers shall be stenciled on the casting for record purposes and for grid area identity. Approved May 1, This will be the reference line for reporting discontinuity amplitudes. ICS Number Code If the reason for loss of back re?
A question on ASTM A
Based on the signals-to-noise ratio of the response pattern of the casting, a frequency in the range from 0. They require external attenuators. The maximum a6609 amplitude for the test blocks used shall peak at approximately three-fourths of the screen height above the sweep by use of the attenuator.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. When grids are laid out on the casting surface and they encompass different quality levels, each speci? Draw a line, using overlays or electronic markers, on the instrument screen, parallel to the sweep line, through the peak of the 1.
The Largest Open Access Portal of Nondestructive Testing (NDT)
The side-drilled hole used for the 1? Machined surfaces shall be acceptance inspected as soon as possible after machining. It also provides supplementary requirements for angle beam testing. NOTE 4—Counter bore shall be 1?
ASTM A609/A609M – 12(2018)
Asym comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Other couplants may be used when agreed upon between the purchaser and supplier.
NOTE 2— Areas shall be measured from the center of the search unit. 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. If a procedure is not speci?