ASTM B686-02a

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Designation: B 686 – 02a
Standard Specification for
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Aluminum Alloy Castings, High-Strength
This standard is issued under the fixed designation B 686; 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 (e) 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 * E 29 Practice for Using Significant Digits in Test Data to
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Determine Conformance with Specifications
1.1 This specification covers aluminum-alloy high-strength
E 34 Test Methods for Chemical Analysis of Aluminum and
castings designated as shown in Table 1.
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Aluminum-Base Alloys
1.2 Castings covered by this specification are intended for
E 88 Practice for Sampling Nonferrous Metals and Alloys
use in airframe, missile, and other critical applications where
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in Cast Form for Determination of Chemical Composition
high strength, ductility, and sound castings are required.
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E 94 Guide for Radiographic Examination
1.3 For acceptance criteria for inclusion of new aluminum
E 155 Reference Radiographs for Examination of Alumi-
and aluminum alloys and their properties in this specification,
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num and Magnesium Castings
see Annex A1 and Annex A2.
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E 165 Test Method for Liquid Penetrant Examination
1.4 The values stated in either inch-pound units or SI units
E 227 Test Method for Optical Emission Spectrometric
are to be regarded separately as standard. Within the text, the
Analysis of Aluminum and Aluminum Alloys by the
SI units are shown in brackets.The values stated in each system
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Point-to-Plane Technique
are not exact equivalents; therefore, each system shall be used
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E 527 Practice for Numbering Metals and Alloys (UNS)
independently of the other. Combining values from the two
E 607 Test Method for Optical Emission Spectrometric
systems may result in nonconformance with the standard.
Analysis of Aluminum and Aluminum Alloys by the
1.5 This standard does not purport to address all of the
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Point-to-Plane Technique, Nitrogen Atmosphere
safety concerns, if any, associated with its use. It is the
E 716 Practices for Sampling Aluminum and Aluminum
responsibility of the user of this standard to establish appro-
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Alloys for Spectrochemical Analysis
priate safety and health practices and determine the applicabil-
E 1251 Test Method for Optical Emission Spectrometric
ity of regular limitations prior to use.
Analysis of Aluminum and Aluminum Alloys by the Argon
2. Referenced Documents
Atmosphere, Point-to-Plane, Unipolar Self-Initiating Ca-
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pacitor Discharge
2.1 The following documents of the issue in effect on the
IEEE/ASTM SI 10 Standard for Use of the International
date of purchase form a part of this specification to the extent
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System of Units (SI): The Modern Metric System
referenced herein:
2.3 ANSI Standards:
2.2 ASTM Standards:
H35.1 Alloy and Temper Designation Systems for Alumi-
B 179 Specification for Aluminum Alloys in Ingot and
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num
Molten Forms for Castings from All Casting Processes
Z1.4 Sampling Procedures and Tables for Inspection by
B 557 Test Methods for Tension Testing Wrought and Cast
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2
Attributes
Aluminum- and Magnesium-Alloy Products
2.4 Military Standards:
B 660 Practices for Packaging/Packing of Aluminum and
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MIL-STD-129 Marking for Shipment and Storage
Magnesium Products
2.5 Federal Standard:
B 917/B 917M Practice for Heat treating Aluminum-Alloy
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Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
Castings from All Processes
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D 3951 Practice for Commercial Packaging
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Annual Book of ASTM Standards, Vol 14.02.
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This specification is under the jurisdiction of ASTM Committee B07 on Light Annual Book of ASTM Standards, Vol 03.05.
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Metals and Alloys and is the direct responsibility of Subcommittee B07.01 on Annual Book of ASTM Standards, Vol 03.03.
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Aluminum Alloy Ingots and Castings. Annual Book of ASTM Standards, Vol 01.01.
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Current edition approved Oct. 10, 2002. Published January 2003. Originally Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
published as B 686 – 81. Last previous edition B 686 – 99. 4th Floor, New York, NY 10036.
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Annual Book of ASTM Standards, Vol 02.02. Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700
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Annual Book of ASTM Standards, Vol 15.09. Robbins Ave., Philadelphia, PA 19111-5098 Attn: NPODS.
*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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