ASTM B618/B618M-18
(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. (A) When single units are shown, they indicate the maximum amounts permitted.(B) Analysis shall be made for the elements for which limits are shown in this table.(C) The following applies to all specified limits in this table: For purposes of determining conformance to these limits, an observed value or a calculated value obtained from analysis shall be rounded to the nearest unit in the last right-hand place of figures used in expressing the specified limit in accordance with the rounding-off method of Practice E29.(D) In case of discrepancy between the values listed in Table 1 and those listed in the “Designations and Composition Limits for Aluminum Alloys in the Form of Castings and Ingot (known as the ‘Pink Sheets’),” the composition limits registered with the Aluminum Association and published in the “Pink Sheets” shall be considered the controlling composition.(E) “Others” includes listed elements for which no specific limit is shown as well as unlisted metallic elements. The producer may analyze samples for trace elements not specified in the specification. However, such analysis is not required and may not cover all metallic “Others” elements. Should any analysis by the producer or the purchaser establish that an “Others” element exceeds the limit of “Each” or that the aggregate of several “Others” elements exceeds the limit of “Total,” the material shall be considered nonconforming.(F) Other Elements—Total shall be the sum of unspecified metallic elements 0.010 % or more, rounded to the second decimal before determining the sum.(G) If iron exceeds 0.45 %, manganese content shall not be less than one half of the iron content.(H) The Aluminum Association ruling on the number of decimal places to which Mg percent is expressed is exempted for some long standing alloys. See A2.2.6.(I) 710.0 formerly A712.0, 712.0 formerly D712.0, 851.0 formerly A850.0, 852.0 formerly B850.0.(J) For a cross reference of current and former alloy designations see the Aluminum Association’s “Designations and Chemical Composition Limits for Aluminum Alloys in the Form of Castings and Ingot (The Pink Sheets).”
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 ...
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Designation: B618/B618M −18
Standard Specification for
1
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.
1. Scope* 2. Referenced Documents
2.1 The following documents of the issue in effect on the
1.1 This specification covers aluminum-alloy investment
date of purchase form a part of this specification to the extent
castings designated as shown in Table 1.
referenced herein:
1.2 This specification is for aluminum-alloy investment
2
2.2 ASTM Standards:
castings used in general purpose applications. It may not
B179Specification for Aluminum Alloys in Ingot and Mol-
address the mechanical properties integrity testing and verifi-
ten Forms for Castings from All Casting Processes
cationrequiredforhighlyloadedorsafetycriticalapplications.
B275PracticeforCodificationofCertainZinc,TinandLead
1.3 Alloy and temper designations are in accordance with
Die Castings
ANSI H35.1/H35.1(M).
B557Test Methods for Tension Testing Wrought and Cast
Aluminum- and Magnesium-Alloy Products
1.4 Unless the order specifies the “M” specification
B557MTest Methods forTensionTestingWrought and Cast
designation, the material shall be furnished to the inch-pound
Aluminum- and Magnesium-Alloy Products (Metric)
units.
B660Practices for Packaging/Packing of Aluminum and
1.5 For acceptance criteria for inclusion of new aluminum
Magnesium Products
and aluminum alloys and their properties in this specification,
B666/B666MPractice for Identification Marking of Alumi-
see Annex A1 and Annex A2.
num and Magnesium Products
B881Terminology Relating toAluminum- and Magnesium-
1.6 Units—The values stated in either SI units or inch-
Alloy Products
pound units are to be regarded separately as standard. The
B917/B917MPractice for Heat Treatment of Aluminum-
values stated in each system may not be exact equivalents;
Alloy Castings from All Processes
therefore,eachsystemshallbeusedindependentlyoftheother.
B985Practice for SamplingAluminum Ingots, Billets, Cast-
Combining values from the two systems may result in noncon-
ings and Finished or Semi-Finished Wrought Aluminum
formance with the standard.
Products for Compositional Analysis
1.7 This standard does not purport to address all of the
D3951Practice for Commercial Packaging
safety concerns, if any, associated with its use. It is the
E29Practice for Using Significant Digits in Test Data to
responsibility of the user of this standard to establish appro-
Determine Conformance with Specifications
priate safety, health, and environmental practices and deter-
E34Test Methods for Chemical Analysis of Aluminum and
3
mine the applicability of regulatory limitations prior to use.
Aluminum-Base Alloys (Withdrawn 2017)
1.8 This international standard was developed in accor- E94Guide for Radiographic Examination Using Industrial
Radiographic Film
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the E155Reference Radiographs for Inspection of Aluminum
Development of International Standards, Guides and Recom- and Magnesium Castings
mendations issued by the World Trade Organization Technical E165Practice for Liquid Penetrant Examination for General
Barriers to Trade (TBT) Committee. Industry
E607 Test Method for Atomic Emission Spectrometric
1 2
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.
3
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-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, 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.
J
Desig Si Fe Cu Mn Mg Cr Ni Zn Ti Ag Be Pb Sn Zr FNs
F
Min.
Each Total
201.0 0.10 0.15 4.0–5.2 0.20–0.50 0.15–0.55 . . . . . . . . . 0.15
...
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: B618/B618M − 14 B618/B618M − 18
Standard Specification for
1
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. 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 U.S. Department of Defense.
1. 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). 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 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 safety, health, and healthenvironmental 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.
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 2014May 2018. Originally approved in 1977. Last previous edition approved in 20112014 as
B618/B618M – 11a.B618/B618M – 14. DOI: 10.1520/B0618_B0618M-14.10.1520/B0618_B0618M-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
---------------------- Page: 1 ----------------------
B618/B618M − 18
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TABLE 1 Chemical Composition Requirements
NOTE 1—When single units are shown, these indicate the maximum amounts permitted.
NOTE 2—Analysis shall be ma
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