ASTM A388/A388M - 23
Standard Practice for Ultrasonic Examination of Steel Forgings
| Aviso: | Las normas ASTM en lectura se visualizan a través del área decliente. Los archivos no se pueden descargar |
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| Fecha edición: |
2023-11-01
Anulada
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| Fecha de anulación: | 2023-11-01 |
| Idiomas disponibles: | Inglés |
| Resumen: | This practice covers the examination procedures for the contact, pulse-echo ultrasonic examination of heavy steel forgings by the straight and angle-beam techniques. An ultrasonic, pulsed, reflection type of instrument shall be used and shall provide linear presentation for at least 75% of the screen height. The 5% linearity referred to is descriptive of the screen presentation of amplitude. The electronic apparatus shall contain an attenuator, search units, transducers, couplants, reference blocks, and DGS scales. The forging shall be machined to provide cylindrical surfaces for radial examination in the case of round forgings. The ends of the forgings shall be machined perpendicular to the axis of the forging for the axial examination. Faces of disk and rectangular forgings shall be machined flat and parallel to one another. The procedures to be performed are as follows: ultrasonic examination of the forgings; straight-beam examination with establishment of the instrument sensitivity and calibration either by the reflection, reference-block technique, or DGS method; and angle-beam examination used for rings and hollow forgings. |
| Keywords: | angle beam examination; back-reflection; DGS; reference-block; straight beam examination; ultrasonic; |
| Scope: | 1.1 This practice2 covers the examination procedures for the contact, pulse-echo ultrasonic examination of steel forgings by the straight and angle-beam techniques. The straight beam techniques include utilization of the DGS (Distance Gain-Size) method. See Appendix X3. 1.2 This practice is to be used whenever the inquiry, contract, order, or specification states that forgings are to be subject to ultrasonic examination in accordance with Practice A388/A388M. 1.3 Supplementary requirements of an optional nature are provided for use at the option of the purchaser. The supplementary requirements shall apply only when specified individually by the purchaser in the purchase order or contract. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.5 This practice and the applicable material specifications are expressed in both inch-pound units and SI units. However, unless the order specifies the applicable “M” specification designation [SI units], the material shall be furnished to inch-pound units. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. |
| ICS: | 77.040.20 - Ensayos no destructivos de metales, 77.140.85 - Piezas forjadas |
| CTN: | A01.06 - A01.06 |
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Otras Relaciones |
Es referenciada por A0711_A0711M-17R22 Es referenciada por A600 - 92a(2024) Es referenciada por A960/A960M - 25a Es referenciada por A1099/A1099M - 20(2025) Es referenciada por A508/A508M - 23a Es referenciada por A372/A372M - 20(2025) Es referenciada por A788/A788M - 25a Es referenciada por A707/A707M - 25 Es referenciada por A0837_A0837M-17R22 Es referenciada por A0729_A0729M-17R22 Es referenciada por A1049_A1049M-18R23 Es referenciada por A0504_A0504M-18R23 Es referenciada por A0668_A0668M-23 Es referenciada por A0859_A0859M-23 Es referenciada por A745/A745M - 24 Es referenciada por A182/A182M - 26 Es referenciada por A471/A471M - 19(2024) Es referenciada por A503/A503M - 25 Es referenciada por A686 - 92(2024) Es referenciada por A765/A765M - 24 |
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