ASTM B26 B26M-2018e1 Standard Specification for Aluminum-Alloy Sand Castings.pdf

1、Designation: B26/B26M 181Standard Specification forAluminum-Alloy Sand Castings1This standard is issued under the fixed designation B26/B26M; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in pa

2、rentheses indicates the year of last reapproval. Asuperscript 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.1NOTERevised Footnote B of Table 4 editorially in August 2018.1. Scope*1.

3、1 This specification2covers aluminum-alloy sand castingsdesignated as shown in Table 1.1.2 This specification is for aluminum-alloy sand castingsused in general purpose applications. It may not address themechanical properties, integrity testing, and verification re-quired for highly loaded or safet

4、y critical applications.1.3 Alloy and temper designations are in accordance withANSI H35.1/H35.1M.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 t

5、heir properties in this specification,see Annex A1 and Annex A2.1.6 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of the other. Combini

6、ngvalues from the two systems may result in nonconformancewith 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, health, and environmental pract

7、ices and deter-mine the applicability of regulatory limitations prior to use.1.8 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and

8、 Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 The following documents of the issue in effect on dateof material purchase form a part of this specification to theextent referenced herein:2.2 ASTM Standards:3B179 Specific

9、ation 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 Wroug

10、ht and CastAluminum- and Magnesium-Alloy Products (Metric)B660 Practices for Packaging/Packing of Aluminum andMagnesium ProductsB666/B666M Practice for Identification Marking of Alumi-num and Magnesium ProductsB881 Terminology Relating to Aluminum- and Magnesium-Alloy ProductsB917/B917M Practice for

11、 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 t

12、oDetermine Conformance with SpecificationsE34 Test Methods for Chemical Analysis of Aluminum andAluminum-Base Alloys (Withdrawn 2017)4E94/E94M Guide for Radiographic Examination Using In-dustrial Radiographic Film1This specification is under the jurisdiction of ASTM Committee B07 on LightMetals and

13、Alloys and is the direct responsibility of Subcommittee B07.01 onAluminum Alloy Ingots and Castings.Current edition approved May 15, 2018. Published June 2018. Originallyapproved in 1918. Last previous edition approved in 2014 as B26/B26M 141.DOI: 10.1520/B0026_B0026M-18E01.2For ASME Boiler and Pres

14、sure Vessel Code applications see related Specifi-cation SB-26/SB-26M in Section II of that Code.3For 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 Docum

15、ent Summary page onthe ASTM website.4The 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 StatesTh

16、is international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (

17、TBT) Committee.1E155 Reference Radiographs for Inspection of Aluminumand Magnesium CastingsE165/E165M Practice for Liquid Penetrant Examination forGeneral IndustryE607 Test Method for Atomic Emission SpectrometricAnalysis Aluminum Alloys by the Point to Plane Tech-nique Nitrogen Atmosphere (Withdraw

18、n 2011)4E716 Practices for Sampling and Sample Preparation ofAluminum and Aluminum Alloys for Determination ofChemical Composition by Spark Atomic Emission Spec-trometryE1251 Test Method for Analysis of Aluminum and Alumi-num Alloys by Spark Atomic Emission SpectrometryE2422 Digital Reference Images

19、 for Inspection of Alumi-num CastingsIEEE/ASTM SI 10 Standard for Use of the InternationalSystem of Units (SI): The Modern Metric System2.3 AMS Standard:5AMS 2771 Heat Treatment of Aluminum Alloy Castings2.4 American National Standards:6H35.1/H35.1(M) Alloy and Temper Designation System forAluminum2

20、.5 Military Standards:7MIL-STD-129 Marking for Shipment and StorageMIL-STD-276 Impregnation of Porous Nonferrous MetalCastingsNAVSEA Technical Publication S9074-AR-GIB-010/2782.6 Federal Standard:7Fed. Std. No. 123 Marking for Shipment (Civil Agencies)2.7 Aluminum Association Standard:6Designations

21、and Chemical Composition Limits for Alumi-num Alloys in the Form of Castings and Ingot (The PinkSheets)2.8 Other Standards:8EN 14242 Aluminum and Aluminum AlloysChemicalAnalysisInductively Coupled Plasma Optical EmissionSpectral Analysis3. Terminology3.1 Definitions:3.1.1 Refer to Terminology B881 f

22、or definitions of productterms used in this specification.3.2 Definitions of Terms Specific to This Standard:3.2.1 sand casting, na metal object produced by pouringmolten metal into a sand mold and allowing it to solidify.4. Ordering Information4.1 Orders for material under this specification shall

23、includethe following information (1.4 and 1.5):4.1.1 This specification designation (which includes thenumber, year, and revision letter, if applicable),NOTE 1For inch-pound application, specify Specification B26 and formetric application specify Specification B26M. Do not mix units.4.1.2 The quanti

24、ty in either pieces or pounds kilograms,4.1.3 Alloy (Section 7 and Table 1),4.1.4 Temper (Section 10 and Table 2), and4.1.5 Applicable drawing or part number,4.2 Additionally, orders for material to this specificationshall include the following information when required by thepurchaser:4.2.1 Whether

25、 chemical analysis and tensile property re-ports are required (Table 1 and Table 2),4.2.2 Whether castings or test bars, or both, may be artifi-cially aged for Alloys 705.0-T5, 707.0-T5, 712.0-T5, and713.0-T5 (10.2) and whether yield strength tests are requiredfor these alloys;4.2.3 Whether test spe

26、cimens cut from castings are requiredin addition to, or instead of, separately cast specimens (Sec-tions 10 and 13);4.2.4 Whether heat treatment is to be performed in accor-dance with AMS 2771 (see Section 15),4.2.5 Whether repairs are permissible (16.1),4.2.6 Whether inspection is required at the p

27、roducersworks (Section 18);4.2.7 Whether certification is required (21.1);4.2.8 Whether surface requirements shall be checkedagainst observational standards where such standards areestablished (19.1);4.2.9 Whether liquid penetrant inspection is required (19.2);4.2.10 Whether radiographic inspection

28、is required and, ifso, the radiographic grade of casting required (19.3, Table 3);4.2.11 Whether foundry control is required (Section 9); and4.2.12 Whether Practice B660 applies and, if so, the levelsof preservation, packaging, and packing required (24.4).5. Quality Assurance5.1 Unless otherwise spe

29、cified in the contract or purchaseorder, the producer shall be responsible for the performance ofall inspections and test requirements specified herein. Unlessdisapproved by the purchaser, the producer may use his own orany other suitable facilities for the performance of the inspec-tion and test re

30、quirements specified herein. The purchaser shallhave the right to perform any of the inspections and tests setforth in this specification where such inspections are deemednecessary to confirm that the material conforms to prescribedrequirements.6. Manufacture6.1 The responsibility of furnishing cast

31、ings that can be laidout and machined to the finished dimensions within thepermissible variations specified, as shown on the blueprints ordrawings, shall rest with the producer, except where patternequipment is furnished by the purchaser.7. Chemical Composition7.1 The Product shall conform to the ch

32、emical compositionlimits prescribed in Table 1. Conformance shall be determined5Available from Society of Automotive Engineers (SAE), 400 CommonwealthDr., Warrendale, PA 15096-0001, http:/www.sae.org.6Available from Aluminum Association, Inc., 1400 Crystal Drive Suite 430Arlington, VA 22202 http:/ww

33、w.aluminum.org.7Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.8Available from European Committee for Standardization (CEN), 36 rue deStassart, B-1050, Brussels, Belgium, http:/www.cenorm.be.B26

34、/B26M 1812TABLE1ChemicalCompositionLimitsA,B,C,DDesig.JSiFeCuMnMgCrNiZnTiAgBePbSnZr-FNsOTHERSEAlMin.EachTotalF201.00.100.154.05.20.200.500.150.55.0.150.350.401.0.0.050.10Rem.204.00.200.354.25.00.100.150.35.0.050.100.150.30.0.05.0.050.15Rem.242.00.71.03.54.50.351.21.80.251.72.30.350.25.0.050.15Rem.A2

35、42.00.60.83.74.50.101.21.70.150.251.82.30.100.070.20.0.050.15Rem.295.00.71.51.04.05.00.350.03.0.350.25.0.050.15Rem.319.05.56.51.03.04.00.500.10.0.351.00.25.0.50Rem.328.07.58.51.01.02.00.200.60.200.60.350.251.50.25.0.50Rem.355.04.55.50.6G1.01.50.50G0.400.60.25.0.350.25.0.050.15Rem.C355.04.55.50.201.0

36、1.50.100.400.6.0.100.20.0.050.15Rem.356.06.57.50.6G0.250.35G0.200.45.0.350.25.0.050.15Rem.A356.06.57.50.200.200.100.250.45.0.100.20.0.050.15Rem.443.04.56.00.80.60.500.050.25.0.500.25.0.35Rem.B443.04.56.00.80.150.350.05.0.350.25.0.050.15Rem.512.01.42.20.60.350.83.54.50.25.0.350.25.0.050.15Rem.514.00.

37、350.500.150.353.54.5.0.150.25.0.050.15Rem.520.00.250.300.250.159.510.6.0.150.25.0.050.15Rem.535.00.150.150.050.100.256.27.5.0.100.25.0.0030.007.0.005B.0.050.15Rem.705.00.200.80.200.400.61.41.80.200.40.2.73.30.25.0.050.15Rem.707.00.200.80.200.400.61.82.40.200.40.4.04.50.25.0.050.15Rem.710.0I0.150.500

38、.350.60.050.60.8.6.07.00.25.0.050.15Rem.712.0I0.300.500.250.100.500.65H0.400.6.5.06.50.150.25.0.050.20Rem.713.00.251.10.401.00.60.200.500.350.157.08.00.25.0.100.25Rem.771.00.150.150.100.100.81.00.060.20.6.57.50.100.20.0.050.15Rem.850.00.70.70.71.30.100.10.0.71.3.0.20.5.57.0.0.30Rem.851.0I2.03.00.70.

39、71.30.100.10.0.300.7.0.20.5.57.0.0.30Rem.852.0I0.400.71.72.30.100.60.9.0.91.5.0.20.5.57.0.0.30Rem.AWhensingleunitsareshown,theyindicatethemaximumamountspermitted.BAnalysisshallbemadefortheelementsforwhichlimitsareshowninthistable.CThefollowingappliestoallspecifiedlimitsinthistable:Forpurposesofdeter

40、miningconformancetotheselimits,anobservedvalueoracalculatedvalueobtainedfromanalysisshallberoundedtothenearestunitinthelastright-handplaceoffiguresusedinexpressingthespecifiedlimitinaccordancewiththerounding-offmethodofPracticeE29.DIncaseofdiscrepancybetweenthevalueslistedinTable1andthoselistedinthe

41、“DesignationsandCompositionLimitsforAluminumAlloysintheFormofCastingsandIngot(knownasthePinkSheets)”,thecompositionlimitsregisteredwiththeAluminumAssociationandpublishedinthe“PinkSheets”shouldshallbeconsideredthecontrollingcomposition.E“Others”includeslistedelementsforwhichnospecificlimitisshownaswe

42、llasunlistedmetallicelements.Theproducermayanalyzesamplesfortraceelementsnotspecifiedinthespecification.However,suchanalysisisnotrequiredandmaynotcoverallmetallic“Others”elements.Shouldanyanalysisbytheproducerorthepurchaserestablishthatan“Others”elementexceedsthelimitof“Each”orthattheaggregateofseve

43、ral“Others”elementsexceedsthelimitof“Total,”thematerialshallbeconsiderednonconforming.FOtherElementsTotalshallbethesumofunspecifiedmetallicelements0.010%ormore,roundedtotheseconddecimalbeforedeterminingthesum.GIfironexceeds0.45,manganesecontentshallnotbelessthanone-halfironcontent.HTheAluminumAssoci

44、ationrulingonthenumberofdecimalplacestowhichMgpercentisexpressedisexemptedforsomelongstandingalloys.SeeA2.2.6.I710.0formerlyA712.0,712.0formerlyD712.0,851.0formerlyA850.0,852.0formerlyB850.0.JForacrossreferenceofcurrentandformeralloydesignationsseetheAluminumAssociations“DesignationsandCompositionLi

45、mitsforAluminumAlloysintheFormofCastingsandIngot(knownasthePinkSheets)”.B26/B26M 1813by the producer by taking samples at the time castings arepoured in accordance with Practice E716 and analyzed inaccordance with Test Methods E607, E1251,orE34,orEN 14242. If the producer has determined the composit

46、ion ofthe material during casting, they shall not be required to sampleand analyze the finished product.7.1.1 A sample for determination of chemical compositionshall be taken to represent one of the following:7.1.2 Not more than 4000 lb 2000 kg of clean castings ora single casting poured from one fu

47、rnace.7.1.3 The maximum elapsed time between determinationsshall be established for each alloy, but in any case themaximum elapsed time shall not exceed 8 h.7.2 If it becomes necessary to analyze castings for confor-mance to chemical composition limits, the method used tosample castings for the determination of chemical compositionshall be in accordance with Practice B985. Analysis shall beperformed in accordance with Practice E716, Test MethodsE34, E607,orE1251, or EN 14242 (ICP met