ASTM B618/B618M-18e1
(Specification)Standard Specification for Aluminum-Alloy Investment Castings
Standard Specification for Aluminum-Alloy Investment Castings
ABSTRACT
This specification covers aluminum-alloy investment castings. Unless otherwise specified, only aluminum alloy conforming to the requirements shall be used in the remelting furnace from which molten metal is taken for pouring directly into castings. The castings shall conform to the chemical composition requirements specified. The determination of chemical composition shall be made in accordance with suitable chemical (test methods E 34), or spectrochemical (test methods E 607 and E 1251) methods. Unless otherwise specified, only aluminum alloy conforming to the requirements shall be used in the remelting furnace from which molten metal is taken for pouring directly into castings. Foundry control shall consist of examination of castings by radiographic or other approved methods for determining internal discontinuities until the gating, pouring, and other foundry practices have been established to produce castings meeting the required quality standards. The tensile properties shall be determined in accordance with test methods B 557 and B 557M. Heat treatment of castings shall be performed in accordance with practice B 917/B 917M.
SCOPE
1.1 This specification covers aluminum-alloy investment castings designated as shown in Table 1.
1.2 This specification is for aluminum-alloy investment castings used in general purpose applications. It may not address the mechanical properties integrity testing and verification required for highly loaded or safety critical applications.
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 nonconformance 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.
General Information
Relations
Standards Content (Sample)
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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Designation: B618/B618M −18
Standard Specification for
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Aluminum-Alloy Investment Castings
This standard is issued under the fixed designation B618/B618M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber 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 U.S. Department of Defense.
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ε NOTE—Footnote C of Table 3 was revised editorially in August 2018.
1. Scope* 2. Referenced Documents
1.1 This specification covers aluminum-alloy investment
2.1 The following documents of the issue in effect on the
castings designated as shown in Table 1.
date of purchase form a part of this specification to the extent
referenced herein:
1.2 This specification is for aluminum-alloy investment
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castings used in general purpose applications. It may not
2.2 ASTM Standards:
address the mechanical properties integrity testing and verifi-
B179Specification for Aluminum Alloys in Ingot and Mol-
cationrequiredforhighlyloadedorsafetycriticalapplications.
ten Forms for Castings from All Casting Processes
1.3 Alloy and temper designations are in accordance with B275PracticeforCodificationofCertainZinc,TinandLead
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Die Castings (Withdrawn 2020)
ANSI H35.1/H35.1(M).
B557Test Methods for Tension Testing Wrought and Cast
1.4 Unless the order specifies the “M” specification
Aluminum- and Magnesium-Alloy Products
designation, the material shall be furnished to the inch-pound
B557MTest Methods forTensionTestingWrought and Cast
units.
Aluminum- and Magnesium-Alloy Products (Metric)
1.5 For acceptance criteria for inclusion of new aluminum
B660Practices for Packaging/Packing of Aluminum and
and aluminum alloys and their properties in this specification,
Magnesium Products
see Annex A1 and Annex A2.
B666/B666MPractice for Identification Marking of Alumi-
num and Magnesium Products
1.6 Units—The values stated in either SI units or inch-
B881Terminology Relating toAluminum- and Magnesium-
pound units are to be regarded separately as standard. The
Alloy Products
values stated in each system may not be exact equivalents;
B917/B917MPractice for Heat Treatment of Aluminum-
therefore,eachsystemshallbeusedindependentlyoftheother.
Alloy Castings From All Processes
Combining values from the two systems may result in noncon-
B985Practice for SamplingAluminum Ingots, Billets, Cast-
formance with the standard.
ings and Finished or Semi-Finished Wrought Aluminum
1.7 This standard does not purport to address all of the
Products for Compositional Analysis
safety concerns, if any, associated with its use. It is the
D3951Practice for Commercial Packaging
responsibility of the user of this standard to establish appro-
E29Practice for Using Significant Digits in Test Data to
priate safety, health, and environmental practices and deter-
Determine Conformance with Specifications
mine the applicability of regulatory limitations prior to use.
E34Test Methods for Chemical Analysis of Aluminum and
1.8 This international standard was developed in accor-
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Aluminum-Base Alloys (Withdrawn 2017)
dance with internationally recognized principles on standard-
E94Guide for Radiographic Examination Using Industrial
ization established in the Decision on Principles for the
Radiographic Film
Development of International Standards, Guides and Recom-
E155Reference Radiographs for Inspection of Aluminum
mendations issued by the World Trade Organization Technical
and Magnesium Castings
Barriers to Trade (TBT) Committee.
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This specification is under the jurisdiction ofASTM 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 May 2018. Originally the ASTM website.
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approved in 1977. Last previous edition approved in 2014 as B618/B618M–14. The last approved version of this historical standard is referenced on
DOI: 10.1520/B0618_B0618M-18E01. 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, West Conshohocken, PA 19428-2959. United States
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B618/B618M − 18
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A,B,C,D
TABLE 1 Chemical Composition Requirements
E
Others
Al.
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