ASTM B594-06
(Practice)Standard Practice for Ultrasonic Inspection of Aluminum-Alloy Wrought Products for Aerospace Applications
Standard Practice for Ultrasonic Inspection of Aluminum-Alloy Wrought Products for Aerospace Applications
SIGNIFICANCE AND USE
A number of factors such as the condition of the entry and back surfaces of the inspected part, the inclination of the ultrasonic beam with respect to the entry surface, and variations in the performance characteristics of the test system may cause significant differences in amplitudes of discontinuity indications and back reflections. These factors can seriously impair the reliability and the quantitative value of the ultrasonic test outlined in this practice.
Accurate evaluations of discontinuity size are also significantly affected by variations in search unit characteristics and by irregularities in discontinuity surfaces which can influence reflectivity. For these reasons, the discontinuity sizes that may be implied by the ultrasonic comparisons outlined in this practice must be regarded as “apparent” or “estimated” in recognition of the limited quantitative value of the measurement.
Because numerous interacting variables in a test system can adversely influence the results of an ultrasonic inspection, the actual quantitative effects of detected discontinuities upon the mechanical properties of the inspected product are difficult to establish. Although this practice provides a reliable control of product quality during manufacture, it is not applicable as an exclusive indicator of the ultimate quality and performance of components fabricated from the inspected products covered by this practice.
SCOPE
1.1 This practice covers the requirements for pulse-echo ultrasonic inspection and includes criteria used to define applicable quality levels of aluminum-alloy wrought products for aerospace applications when performance of the ultrasonic test by the producer is specified, or when ultrasonic inspection is performed by the purchaser upon receipt.
1.2 This practice is not applicable if plastic deformation is introduced into the material after delivery.
1.3 The ultrasonic test described in this practice is employed to detect internal discontinuities oriented in a direction parallel to, or nearly parallel to, the surface of the product. The test is performed either by the immersion method or the contact method using pulsed longitudinal waves which are transmitted and received by a search unit containing either a single crystal or a combination of electrically interconnected multiple crystals. Ultrasonic tests employing either the through-transmission or the angle-beam techniques are not included. Note 1Ultrasonic tests employing angle-beam techniques require special reference blocks, search units, and scanning procedures and are subject to negotiation between the purchaser and the seller when such tests are required by the contract or purchase order.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversions to SI units which are provided for information only and are not considered standard.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Standards Content (Sample)
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Designation: B594 – 06
Standard Practice for
Ultrasonic Inspection of Aluminum-Alloy Wrought Products
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for Aerospace Applications
This standard is issued under the fixed designation B594; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* 2. Referenced Documents
1.1 This practice covers the requirements for pulse-echo 2.1 The following documents of the issue in effect on date
ultrasonic inspection and includes criteria used to define of material purchase form a part of this practice to the extent
applicable quality levels of aluminum-alloy wrought products referenced herein:
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for aerospace applications when performance of the ultrasonic 2.2 ASTM Standards:
test by the producer is specified, or when ultrasonic inspection B881 TerminologyRelatingtoAluminum-andMagnesium-
is performed by the purchaser upon receipt. Alloy Products
1.2 This practice is not applicable if plastic deformation is E114 Practice for Ultrasonic Pulse-Echo Straight-Beam Ex-
introduced into the material after delivery. amination by the Contact Method
1.3 Theultrasonictestdescribedinthispracticeisemployed E127 Practice for Fabricating and Checking Aluminum
to detect internal discontinuities oriented in a direction parallel Alloy Ultrasonic Standard Reference Blocks
to, or nearly parallel to, the surface of the product. The test is E214 Practice for Immersed Ultrasonic Testing by the
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performed either by the immersion method or the contact Reflection Method Using Pulsed Longitudinal Waves
method using pulsed longitudinal waves which are transmitted E317 Practice for Evaluating Performance Characteristics
and received by a search unit containing either a single crystal of Ultrasonic Pulse-Echo Testing Instruments and Systems
or a combination of electrically interconnected multiple crys- without the Use of Electronic Measurement Instruments
tals.Ultrasonictestsemployingeitherthethrough-transmission 2.3 American Society for Nondestructive Testing Standard:
or the angle-beam techniques are not included. ASNT Recommended Practice for Nondestructive Testing
Personnel Qualification and Certification—Ultrasonic
NOTE 1—Ultrasonic tests employing angle-beam techniques require
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Testing Method, SNT-TC-1A
special reference blocks, search units, and scanning procedures and are
2.4 National Aerospace Standard:
subjecttonegotiationbetweenthepurchaserandthesellerwhensuchtests
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are required by the contract or purchase order. NAS-410 Certification of Inspection Personnel
1.4 The values stated in inch-pound units are to be regarded
3. Terminology
asthestandard.Thevaluesgiveninparenthesesaremathemati-
3.1 Definitions—Refer to Terminology B881 for definitions
cal conversions to SI units which are provided for information
of product terms used in this practice.
only and are not considered standard.
1.5 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 appro-
priate safety and health practices and determine the applica-
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
bility of regulatory limitations prior to use.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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This practice is under the jurisdiction of ASTM Committee B07 on Light Withdrawn. The last approved version of this historical standard is referenced
Metals and Alloys and is the direct responsibility of Subcommittee B07.03 on on www.astm.org.
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Aluminum Alloy Wrought Products. AvailablefromAmericanSocietyforNondestructiveTesting(ASNT),P.O.Box
Current edition approved Nov. 1, 2006. Published December 2006. Originally 28518, 1711 Arlingate Ln., Columbus, OH 43228-0518, http://www.asnt.org.
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approved in 1974. Last previous edition approved in 2002 as B594 – 02. DOI: Available fromAerospace IndustriesAssociation ofAmerica, Inc. (AIA), 1000
10.1520/B0594-06. WilsonBlvd.,Suite1700,Arlington,VA22209-3928,http://www.aia-aerospace.org.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B594 – 06
4. Summary of Practice 6.1.2 Engineering Drawings—When ultrasonic inspection
is specified for alloys, section thicknesses, and weights outside
4.1 The product is inspected
...
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