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.
|Genre:||Health and Food|
|Published (Last):||3 September 2012|
|PDF File Size:||10.46 Mb|
|ePub File Size:||9.76 Mb|
|Price:||Free* [*Free Regsitration Required]|
Based on the signals-to-noise ratio of the response pattern of the casting, a frequency in the range from 0.
They may be as cast, blasted, ground, or machined. Procedure B requires calibration using a back wall reflection from a series of solid asfm blocks. NOTE 2—For block sizes over 3 in.
The Largest Open Access Portal of Nondestructive Testing (NDT)
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Ultrasonic examination and radiography are not directly comparable. Still other instruments do not have calibrated gains or attenuators. The instrument to be used for examination shall be the ultrasonic, pulsed, reflection type.
It also provides supplementary requirements for angle beam testing. Adjust the gain of the instrument until the back re? NOTE 2—The attenuator or calibrated gain control may be used to change the signal amplitude during examination to permit small amplitude signals s609 be more readily detected. Draw a curve through these marks on the screen or on suitable graph paper. Linearity shall be determined in accordance with Practice E or equivalent electronic means. If a procedure is not speci?
Calibration shall be executed by either flat-bottomed hole or back-wall reflection. This abstract is a brief summary of the a09 standard. Next, select the test block whose overall length, C Fig.
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. Grid numbers shall be stenciled on the casting for record purposes and for grid area identity.
Search units shall have a frequency of 0. 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 astn by the longitudinal-beam technique.
The supplementary requirements shall apply only when specified individually by the purchaser in the purchase order or contract. NOTE 1—Ultrasonic examination and radiography are not directly comparable.
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. Historical Version s – view previous versions of standard.
Surfaces that do not meet the requirements of The supplementary requirements shall apply only when speci? Other instruments have decibel calibrated attenuators, in which case the required decibel must be removed. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you asfm attend. 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.
In order to accomplish this,? Additional supplemental blocks for testing thickness greater than 10 in.
ASTM A609/A609M – 12(2018)
In order to avoid time loss in production, acceptance inspection of cast surfaces may be done prior to machining. Machined surfaces shall be acceptance inspected as soon as possible after machining. The boundary limits of the indication shall be determined by marking a sufficient number of marks on the casting surfaces where the ultrasonic signal equals one half the reference amplitude, 0.
Therefore, it is impractical to specify an ultrasonic quality level that would be universally applicable to such a diversity of products. Current edition approved May 1, 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.
A question on ASTM A
The area of the location, for the purpose of this evaluation, shall be considered the area that is con? If they are not, the wstm having the largest single indication shall be removed. NOTE 4—Counter bore shall be 1?