ASTM B686/B686M-18
(Specification)Standard Specification for Aluminum Alloy Castings, High-Strength
Standard Specification for Aluminum Alloy Castings, High-Strength
ABSTRACT
This specification covers aluminum-alloy high-strength castings in the following designations: A12010, A03540, A33550, A13560, and A13570. 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. Castings shall be classified by inspection classes: Class 1, Class 2, Class 3, and Class 4 and shall be specified as Grade A, Grade B, Grade C, or Grade D based on radiographic quality. Requirements for the casting process, chemical composition analysis, preproduction sample, radiographic soundness and mechanical property control (including foundry control and acceptance procedure), heat treatment, tensile testing, and dimensions are detailed. The castings shall conform to the chemical composition prescribed for silicon, iron, copper, manganese, magnesium, zinc, titanium, and aluminum, and to the specified mechanical properties such as tensile strength, yield strength and elongation.
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 Alloy and temper designations are in accordance with ANSI H35.1/H35.1 (M).
1.4 Unless the order specifies the “M” specification designation, the material shall be furnished to the inch-pound units.
1.5 For acceptance criteria for inclusion of new aluminum and aluminum alloys and their properties in this specification, see Annex A1 and Annex A2.
1.6 Units—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.
1.7 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.
1.8 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.
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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.
Designation: B686/B686M −18
Standard Specification for
1
Aluminum Alloy Castings, High-Strength
This standard is issued under the fixed designation B686/B686M; 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.
2
1. Scope* 2.2 ASTM Standards:
B179 Specification for Aluminum Alloys in Ingot and Mol-
1.1 This specification covers aluminum-alloy high-strength
ten Forms for Castings from All Casting Processes
castings designated as shown in Table 1.
B275 PracticeforCodificationofCertainZinc,TinandLead
1.2 Castings covered by this specification are intended for 3
Die Castings (Withdrawn 2020)
use in airframe, missile, and other critical applications where
B557 Test Methods for Tension Testing Wrought and Cast
high strength, ductility, and sound castings are required.
Aluminum- and Magnesium-Alloy Products
B557M Test Methods for Tension Testing Wrought and Cast
1.3 Alloy and temper designations are in accordance with
ANSI H35.1/H35.1 (M). Aluminum- and Magnesium-Alloy Products (Metric)
B660 Practices for Packaging/Packing of Aluminum and
1.4 Unless the order specifies the “M” specification
Magnesium Products
designation, the material shall be furnished to the inch-pound
B666/B666M Practice for Identification Marking of Alumi-
units.
num and Magnesium Products
1.5 For acceptance criteria for inclusion of new aluminum
B881 Terminology Relating toAluminum- and Magnesium-
and aluminum alloys and their properties in this specification,
Alloy Products
see Annex A1 and Annex A2.
B917/B917M Practice for Heat Treatment of Aluminum-
Alloy Castings From All Processes
1.6 Units—The values stated in either SI units or inch-
B985 Practice for SamplingAluminum Ingots, Billets, Cast-
pound units are to be regarded separately as standard. The
ings and Finished or Semi-Finished Wrought Aluminum
values stated in each system may not be exact equivalents;
Products for Compositional Analysis
therefore,eachsystemshallbeusedindependentlyoftheother.
D3951 Practice for Commercial Packaging
Combining values from the two systems may result in non-
E29 Practice for Using Significant Digits in Test Data to
conformance with the standard.
Determine Conformance with Specifications
1.7 This standard does not purport to address all of the
E34 Test Methods for Chemical Analysis of Aluminum and
safety concerns, if any, associated with its use. It is the
3
Aluminum-Base Alloys (Withdrawn 2017)
responsibility of the user of this standard to establish appro-
E94 Guide for Radiographic Examination Using Industrial
priate safety, health, and environmental practices and deter-
Radiographic Film
mine the applicability of regulatory limitations prior to use.
E155 Reference Radiographs for Inspection of Aluminum
1.8 This international standard was developed in accor-
and Magnesium Castings
dance with internationally recognized principles on standard-
E165 Practice for Liquid Penetrant Testing for General
ization established in the Decision on Principles for the
Industry
Development of International Standards, Guides and Recom-
E607 Test Method for Atomic Emission Spectrometric
mendations issued by the World Trade Organization Technical
Analysis Aluminum Alloys by the Point to Plane Tech-
Barriers to Trade (TBT) Committee.
3
nique Nitrogen Atmosphere (Withdrawn 2011)
2. Referenced Documents
E716 Practices for Sampling and Sample Preparation of
Aluminum and Aluminum Alloys for Determination of
2.1 The following documents of the issue in effect on the
Chemical Composition by Spark Atomic Emission Spec-
date of purchase form a part of this specification to the extent
trometry
referenced herein:
1 2
This specification is under the jurisdiction of ASTM Committee B07 on Light For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Metals and Alloys and is the direct responsibility of Subcommittee B07.01 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Aluminum Alloy Ingots and Castings. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved May 15, 2018. Published June 2018. Originally the ASTM website.
3
approved in 1981. Last previous edition approved in 2014 as B686/B686M – 14. The last approved version of this historical standard is referenced on
DOI: 10.1520/B0686_B0686M-18. www.astm.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700,
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM 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/B686M − 14 B686/B686M − 18
Standard Specification for
1
Aluminum Alloy Castings, High-Strength
This standard is issued under the fixed designation B686/B686M; 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.
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.
1.3 Alloy and temper designations are in accordance with ANSI H35.1/H35.1 (M). The equivalent Unified Numbering System
alloy designations are in accordance with Practice E527.
1.4 Unless the order specifies the “M” specification designation, the material shall be furnished to the inch-pound units.
1.5 For acceptance criteria for inclusion of new aluminum and aluminum alloys and their properties in this specification, see
Annex A1 and Annex A2.
1.6 Units—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.
1.7 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 safety, health, and healthenvironmental practices and determine the
applicability of regularregulatory limitations prior to use.
1.8 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.
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:
B179 Specification for Aluminum Alloys in Ingot and Molten Forms for Castings from All Casting Processes
B275 Practice for Codification of Certain Zinc, Tin and Lead Die Castings
B557 Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
B557M Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products (Metric)
B660 Practices for Packaging/Packing of Aluminum and Magnesium Products
B666/B666M Practice for Identification Marking of Aluminum and Magnesium Products
B881 Terminology Relating to Aluminum- and Magnesium-Alloy Products
B917/B917M Practice for Heat Treatment of Aluminum-Alloy Castings from All Processes
B985 Practice for Sampling Aluminum Ingots, Billets, Castings and Finished or Semi-Finished Wrought Aluminum Products for
Compositional Analysis
D3951 Practice for Commercial Packaging
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
1
This specification is under the jurisdiction of ASTM Committee B07 on Light Metals and Alloys and is the direct responsibility of Subcommittee B07.01 on Aluminum
Alloy Ingots and Castings.
Current edition approved Oct. 1, 2014May 15, 2018. Published October 2014June 2018. Originally approved in 1981. Last previous edition approved in 20112014 as
B686/B686M – 11.B686/B686M – 14. DOI: 10.1520/B0686_B0686M-14.10.1520/B0686_B0686M-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 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.
*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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B686/B686M − 18
TABLE 1 Chemical Composition Limits
NOTE 1—When single units are shown, they indicate the maximum amounts permitted.
NOTE 2—Analysis shall be made for the elements for which limits are shown in this table.
NOTE 3—The following applies to all specified limits in this table: For purpose
...
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