ASTM B686/B686M-07
(Specification)Standard Specification for Aluminum Alloy Castings, High-Strength
Standard Specification for Aluminum Alloy Castings, High-Strength
SCOPE
1.1 This specification covers aluminum-alloy high-strength castings designated as shown in Table 1.
1.2 Castings covered by this specification are intended for use in airframe, missile, and other critical applications where high strength, ductility, and sound castings are required.
1.3 Unless the order specifies the "M" specification designation, the material shall be furnished to the inch-pound units.
1.4 For acceptance criteria for inclusion of new aluminum and aluminum alloys and their properties in this specification, see Annex A1 and Annex A2.
1.5 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 nonconformance with the standard.
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 and health practices and determine the applicability of regular limitations prior to use.
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Designation: B 686/B 686M – 07
Standard Specification for
1
Aluminum Alloy Castings, High-Strength
This standard is issued under the fixed designation B 686/B 686M; 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* B 275 Practice for Codification of Certain Nonferrous Met-
als and Alloys, Cast and Wrought
1.1 This specification covers aluminum-alloy high-strength
B 557 Test Methods for Tension Testing Wrought and Cast
castings designated as shown in Table 1.
Aluminum- and Magnesium-Alloy Products
1.2 Castings covered by this specification are intended for
B 557M Test Methods for Tension Testing Wrought and
use in airframe, missile, and other critical applications where
Cast Aluminum- and Magnesium-Alloy Products [Metric]
high strength, ductility, and sound castings are required.
B 660 Practices for Packaging/Packing of Aluminum and
1.3 Alloy and temper designations are in accordance with
Magnesium Products
ANSI H35.1/H35.1 (M). The equivalent Unified Numbering
B 881 Terminology Relating to Aluminum- and
System alloy designations are in accordance with Practice
Magnesium-Alloy Products
E 527.
B 917/B 917M Practice for Heat Treatment of Aluminum-
1.4 Unless the order specifies the “M” specification desig-
Alloy Castings from All Processes
nation, the material shall be furnished to the inch-pound units.
D 3951 Practice for Commercial Packaging
1.5 For acceptance criteria for inclusion of new aluminum
E29 Practice for Using Significant Digits in Test Data to
and aluminum alloys and their properties in this specification,
Determine Conformance with Specifications
see Annex A1 and Annex A2.
E34 Test Methods for ChemicalAnalysis ofAluminum and
1.6 The values stated in either SI units or inch-pound units
Aluminum-Base Alloys
are to be regarded separately as standard. The values stated in
E88 Practice for Sampling Nonferrous Metals and Alloys
each system may not be exact equivalents, therefore, each
in Cast Form for Determination of Chemical Composition
system shall be used independently of the other. Combining
E94 Guide for Radiographic Examination
values from the two systems may result in nonconformance
E 155 Reference Radiographs for Inspection of Aluminum
with the standard.
and Magnesium Castings
1.7 This standard does not purport to address all of the
E 165 Test Method for Liquid Penetrant Examination
safety concerns, if any, associated with its use. It is the
E 527 Practice for Numbering Metals and Alloys in the
responsibility of the user of this standard to establish appro-
Unified Numbering System (UNS)
priate safety and health practices and determine the applica-
E 607 Test Method for Atomic Emission Spectrometric
bility of regular limitations prior to use.
Analysis Aluminum Alloys by the Point to Plane Tech-
2. Referenced Documents
nique Nitrogen Atmosphere
E 716 Practices for Sampling Aluminum and Aluminum
2.1 The following documents of the issue in effect on the
Alloys for Spectrochemical Analysis
date of purchase form a part of this specification to the extent
E 1251 Test Method for Analysis of Aluminum and Alumi-
referenced herein:
2
num Alloys by Atomic Emission Spectrometry
2.2 ASTM Standards:
IEEE/ASTM SI 10 Standard for Use of the International
B 179 Specification for Aluminum Alloys in Ingot and
System of Units (SI): The Modern Metric System
Molten Forms for Castings from All Casting Processes
3
2.3 AMS Standard:
AMS 2771 Heat Treatment of Aluminum Alloy Castings
4
2.4 ANSI Standards:
1
This specification is under the jurisdiction of ASTM Committee B07 on Light
H35.1 / H35.1 (M) – 2006 Alloy and Temper Designation
Metals and Alloys and is the direct responsibility of Subcommittee B07.01 on
Aluminum Alloy Ingots and Castings.
Current edition approved Oct. 1, 2007. Published October 2007. Originally
approved in 1981. Last previous edition approved in 2003 as B 686 – 03.
2 3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Society of Automotive Engineers (SAE), 400 Commonwealth
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Dr., Warrendale, PA 15096-0001, http://www.sae.org.
4
Standards volume information, refer to the standard’s Document Summary page on Available from Aluminum Association, Inc., 1525 Wilson Blvd., Suite 600,
the ASTM website. Arlington, VA 22209, http://www.aluminum.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 19428-295
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:B686–03 Designation: B 686/B 686M – 07
Standard Specification for
1
Aluminum Alloy Castings, High-Strength
This standard is issued under the fixed designation B 686/B 686M; 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*
1.1 This specification covers aluminum-alloy high-strength castings designated as shown in Table 1.
1.2 Castings covered by this specification are intended for use in airframe, missile, and other critical applications where high
strength, ductility, and sound castings are required.
1.3For acceptance criteria for inclusion of new aluminum and aluminum alloys and their properties in this specification, see
1.3 Unless the order specifies the “M” specification designation, the material shall be furnished to the inch-pound units.
1.4 For acceptance criteria for inclusion of new aluminum and aluminum alloys and their properties in this specification, see
Annex A1 and Annex A2.
1.4The1.5 Thevaluesstatedineitherinch-poundSIunitsorSIinch-poundunitsaretoberegardedseparatelyasstandard.Within
the text, the SI units are shown in brackets.The The values stated in each system aremay not be exact equivalents;, therefore, each
system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the
standard.
1.51.6 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 and health practices and determine the applicability of regular
limitations prior to use.
2. Referenced Documents
2.1 The following documents of the issue in effect on the date of purchase form a part of this specification to the extent
referenced herein:
2
2.2 ASTM Standards:
B 179 Specification for Aluminum Alloys in Ingot and Molten Forms for Castings from All Casting Processes
B 275 Practice for Codification of Certain Nonferrous Metals and Alloys, Cast and Wrought
2
B 557Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products Test Methods for
Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
B 557M Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products [Metric]
2
B 660Practices for Packaging/Packing ofAluminum and Magnesium Products Practices for Packaging/Packing ofAluminum
and Magnesium Products
B 881 Terminology Relating to Aluminum- and Magnesium-Alloy Products
B 917/B 917M Practice for Heat treating Treatment of Aluminum-Alloy Castings from All Processes
D 3951 Practice for Commercial Packaging
E 29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E 34 Test Methods for Chemical Analysis of Aluminum and Aluminum-Base Alloys
E 88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
E 94 Guide for Radiographic Examination
E 155 Reference Radiographs for ExaminationInspection of Aluminum and Magnesium Castings
E 165 Test Method for Liquid Penetrant Examination
E 527 Practice for Numbering Metals andAlloys (UNS) Practice for Numbering Metals andAlloys in the Unified Numbering
System (UNS)
1
This specification is under the jurisdiction ofASTM Committee B07 on Light Metals andAlloys and is the direct responsibility of Subcommittee B07.01 onAluminum
Alloy Ingots and Castings.
Current edition approved Apr. 10, 2003. Published August 2003. Originally approved in 1981. Last previous edition approved in 2002 as B686–02a.
Current edition approved Oct. 1, 2007. Published October 2007. Originally approved in 1981. Last previous edition approved in 2003 as B 686 – 03.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
, Vol 02.02.volume information, refer to the standard’s Document Summary page on the ASTM website.
*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.
1
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B 686/B 686M – 07
TABLE 1 Chemical Composition Limits
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