ASTM_B_618_-_B_618M_-_14.pdf

Designation:B618/B618M14Standard Specification forAluminum-Alloy Investment Castings1This standard is issued under the fixed designation B618/B618M;the number immediately following the designation indicates the yearof 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 investmentcastings designated as shown in Table 1.1.2 This specification is for aluminum-alloy investmentcastings used in general purpose applications.It may notaddress the mechanical properties integrity testing and verifi-cation required for highly loaded or safety critical applications.1.3 Alloy and temper designations are in accordance withANSI H35.1/H35.1(M).The equivalent Unified NumberingSystem alloy designations are in accordance with PracticeE527.1.4 Unless the order specifies the“M”specificationdesignation,the material shall be furnished to the inch-poundunits.1.5 For acceptance criteria for inclusion of new aluminumand aluminum alloys and their properties in this specification,see Annex A1 and Annex A2.1.6 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard.Thevalues 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 noncon-formance with the standard.1.7 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 The following documents of the issue in effect on thedate of purchase form a part of this specification to the extentreferenced herein:2.2 ASTM Standards:2B179 Specification for Aluminum Alloys in Ingot and Mol-ten Forms for Castings from All Casting ProcessesB275 Practice for Codification of Certain Zinc,Tin and LeadDie CastingsB557 Test Methods for Tension Testing Wrought and CastAluminum-and Magnesium-Alloy ProductsB557M Test Methods for Tension Testing Wrought and CastAluminum-and Magnesium-Alloy Products(Metric)B660 Practices for Packaging/Packing of Aluminum andMagnesium ProductsB881 Terminology Relating to Aluminum-and Magnesium-Alloy ProductsB917/B917M Practice for Heat Treatment of Aluminum-Alloy Castings from All ProcessesB985 Practice for Sampling Aluminum Ingots,Billets,Cast-ings and Finished or Semi-Finished Wrought AluminumProducts for Compositional AnalysisD3951 Practice for Commercial PackagingE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE34 Test Methods for Chemical Analysis of Aluminum andAluminum-Base AlloysE94 Guide for Radiographic ExaminationE155 Reference Radiographs for Inspection of Aluminumand Magnesium CastingsE165 Practice for Liquid Penetrant Examination for GeneralIndustryE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)E607 Test Method for Atomic Emission SpectrometricAnalysis Aluminum Alloys by the Point to Plane Tech-nique Nitrogen Atmosphere(Withdrawn 2011)3E716 Practices for Sampling and Sample Preparation ofAluminum and Aluminum Alloys for Determination ofChemical Composition by Spectrochemical Analysis1This specification is under the jurisdiction of ASTM Committee B07 on LightMetals and Alloys and is the direct responsibility of Subcommittee B07.01 onAluminum Alloy Ingots and Castings.Current edition approved Oct.1,2014.Published October 2014.Originallyapproved in 1977.Last previous edition approved in 2011 as B618/B618M 11a.DOI:10.1520/B0618_B0618M-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 TABLE 1 Chemical Composition RequirementsNOTE1When single units are shown,these indicate the maximum amounts permitted.NOTE2Analysis shall be made for the elements for which limits are shown in this table.NOTE3The following applies to all specified limits in this table:For purposes of acceptance and rejection,an observed value or a calculated value obtained from analysis should be roundedoff to the nearest unit in the last right-hand place of figures used in expressing the specified limit(Practice E29).AlloyComposition,%ANSIAUNSSiliconIronCopperMan-ganeseMag-nesium