1、Designation: B86 11Standard Specification forZinc and Zinc-Aluminum (ZA) Alloy Foundry and DieCastings1This standard is issued under the fixed designation B86; the number immediately following the designation indicates the year of originaladoption or, in the case of revision, the year of last revisi
2、on. A number in parentheses indicates the year of last reapproval. A superscriptepsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specification covers commercial zinc, zinc
3、-aluminum castings and continuous cast bar stock, as designatedand specified in Table 1. Seven alloy compositions are speci-fied and designated as follows:Common Traditional ASTMAUNSAlloy 3 Zamak 3 AG 40ABZ33520Alloy 7 Zamak 7 AG 40B Z33523Alloy 5 Zamak 5 AC 41ABZ35531Alloy 2 Zamak 2 AC 43A Z35541ZA
4、-8 ZA-8 . Z35636ZA-12 ZA-12 . Z35631ZA-27 ZA-27 . Z35841_ASee Table 1, Footnote C.BSAE Specification, Nos. 903 and 925 conform to the requirements for alloysAG40A and AC41A, respectively.1.2 Zinc Alloys Z33520, Z33523, Z35531, and Z35541 areused primarily in the manufacture of pressure die castings.
5、Zinc-Aluminum Alloys Z35636, Z35631, and Z35841 are usedin the manufacture of both foundry and pressure die castings.These alloys are also fabricated into continuous cast bar stockused for prototyping and screw machine stock.1.3 The values stated in inch-pound units are to be regardedas standard. Th
6、e values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 Systems of nomenclature used to designate zinc andzinc-aluminum (ZA) alloys used for casting are described inAppendix X1.1.5 This standard does not purport
7、to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to become familiarwith all hazards including those identified in the appropriateMaterial Safety Data Sheet (MSDS) for this product/materialas provided by the manufacturer, to e
8、stablish appropriatesafety and health practices, and determine the applicability ofregulatory limitations prior to use.2. Referenced Documents2.1 The following documents of the issue in effect on dateof order acceptance form a part of this specification to theextent referenced herein:2.2 ASTM Standa
9、rds:2B240 Specification for Zinc and Zinc-Aluminum (ZA) Al-loys in Ingot Form for Foundry and Die CastingsB275 Practice for Codification of Certain Nonferrous Met-als and Alloys, Cast and WroughtB557 Test Methods for Tension Testing Wrought and CastAluminum- and Magnesium-Alloy ProductsB899 Terminol
10、ogy Relating to Non-ferrous Metals andAlloysB949 Specification for General Requirements for Zinc andZinc Alloy ProductsE8 Test Methods for Tension Testing of Metallic MaterialsE23 Test Methods for Notched Bar Impact Testing ofMetallic MaterialsE29 Practice for Using Significant Digits in Test Data t
11、oDetermine Conformance with SpecificationsE88 Practice for Sampling Nonferrous Metals and Alloys inCast Form for Determination of Chemical CompositionE527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)E536 Test Methods for Chemical Analysis of Zinc and ZincAlloysE634 P
12、ractice for Sampling of Zinc and Zinc Alloys forOptical Emission Spectrometric Analysis2.3 North American Die Casting Association (NADCA):3NADCA Product Specification Standards for Die Castings1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is t
13、he direct responsibility of SubcommitteeB02.04 on Zinc and Cadmium.Current edition approved June 1, 2011. Published July 2011. Originally approvedin 1931. Last previous edition approved in 2010 as B86 - 10a. DOI: 10.1520/B0086-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org,
14、orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from North American Die Casting, Assn., 2000 5th Ave., RiverGrove, IL 60171, http:/www.diecasting.org.1*A Summary of Cha
15、nges 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.2.4 Federal Standard:4Fed. Std. No. 123 Marking for Shipment (Civil Agencies)2.5 Military Standard:4MIL-STD-129 Marking for Shipment and
16、Storage (MilitaryAgencies)2.6 Military Specification:4MIL-P-116 Methods of Preservation2.7 ISO Standards:5ISO 301 Zinc Alloy Ingots Intended for CastingISO 15201 Zinc and Zinc alloysCastingsSpecificationsISO 3815-1 Zinc and zinc alloysPart 1: Analysis of solidsamples by optical emission spectrometry
17、ISO 3815-2 Zinc and zinc alloysPart 2: Analysis byinductively coupled plasma optical emission spectrometry3. Terminology3.1 Terms shall be defined in accordance with TerminologyB899.3.2 Definitions of Terms Specific to This Standard:3.2.1 continuous casting, na casting technique in which acast is co
18、ntinuously withdrawn through the bottom of the moldas it solidifies, so that its length is not determined by molddimensions; used chiefly to produce semifinished mill productssuch as billets, blooms, ingots, slabs, and tubes; also known asconcast.3.2.2 die casting, na casting process in which molten
19、metal is injected under high velocity and pressure into a metaldie and solidified, also a product produced by such a process.Alternately known as pressure die casting.3.2.3 foundry casting, nmetal object produced by intro-ducing molten metal by gravity into a mold of any type andallowing it to solid
20、ify.3.2.4 permanent mold casting, nmetal object produced byintroducing molten metal by gravity or low pressure into amold constructed of durable material, usually iron or steel, andallowing it to solidify. When a graphite mold is used theprocess is known as graphite permanent mold casting.3.2.5 sand
21、 casting, nmetal object produced by introduc-ing molten metal by gravity into a sand mold and allowing it tosolidify.3.2.6 semipermanent mold casting, npermanent moldcasting which is made using an expendable core such as sand.4. Ordering Information4.1 Orders for die castings shall include the follo
22、wing basicinformation in addition to the requirements listed in Specifi-cation B949:4.1.1 Alloy (Table 1), and4.1.2 Drawing of casting, when required, giving all neces-sary dimensions and showing latest revisions and allowancesfor matching, if any. Location of ejector pin marks or partinglines shall
23、 be at the option of the producer, unless specificallydesignated on the drawing.4.2 Additional tests, options, and special inspection require-ments as provided as follows should be justified only on thebasis of need. These shall be specified in the contract or4Available from Standardization Document
24、s Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.5Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.TABLE 1 Chemical RequirementsElementAlloy 3A,B,C,DZamak 3(A
25、G40A)Z33520Alloy 7A,B,C,D,EZamak 7(AG40B)Z33523Alloy 5A,B,C,DZamak 5(AC41A)Z35531Alloy 2A,C,DZamak(AC43A)Z35541 ZA-8A,C,FZA-8Z35636ZA-12A,C,FZA-12Z35631ZA-2A,C,FZA-27Z35841Aluminum 3.7-4.3 3.7-4.3 3.7-4.3 3.7-4.3 8.0-8.8 10.5-11.5 25.0-28.0Magnesium 0.02-0.06G0.005-0.020 0.02-0.06G0.02-0.06 0.01-0.0
26、3 0.01-0.03 0.01-0.02Copper 0.1 maxH0.1 maxE0.7-1.2 2.6-3.3 0.8-1.3 0.5-1.2 2.0-2.5Iron, max 0.05 0.05 0.05 0.05 0.075 0.075 0.075Lead, max 0.005 0.003 0.005 0.005 0.006 0.006 0.006Cadmium, max 0.004 0.002 0.004 0.004 0.006 0.006 0.006Tin, max 0.002 0.001 0.002 0.002 0.003 0.003 0.003Nickel . . . 0.
27、005-0.020 . . . . . . . . . . . . . . .ZincIremainder remainder remainder remainder remainder remainder remainderAFor purposes of acceptance and rejection, the observed value or calculated value obtained from analysis should be rounded to the nearest unit in the last right-handplace of figures, used
28、 in expressing the specified limit, in accordance with the rounding procedure prescribed in Practice E29.BZinc alloy castings may contain nickel, chromium, silicon, and manganese in amounts of 0.02, 0.02, 0.035, and 0.06 %, respectively. No harmful effects have ever beennoted due to the presence of
29、these elements in these concentrations and, therefore, analyses are not required for these elements, with the exception of nickel analysisfor Z33522.CASTM alloy designations were established in accordance with Practice B275. The UNS designations were established in accordance with Practice E527. The
30、 last digitof a UNS number differentiates between alloys of similar composition. The UNS designations for ingot and casting versions of an alloy were not assigned in the samesequence for all alloys.DWhen this material is required to conform to ISO 301, the chemical limits for thallium and indium eac
31、h shall not exceed 0.001 %.EFor the majority of commercial applications, a copper content up to 0.25 % will not adversely affect the serviceability of these die castings and should not serve asa basis for rejection, unless otherwise specified in the contract or purchase order between the producer an
32、d user.FZinc-aluminum ingot for foundry and pressure die casting may contain chrome, manganese, or nickel in amounts of up to 0.01 % each or 0.03 % total. No harmfuleffects have ever been noted due to the presence of these elements in up to these concentrations and, therefore, analyses are not requi
33、red for these elements.GMagnesium may be as low as 0.015 % provided that the lead, cadmium, and tin do not exceed 0.003, 0.003, and 0.001 %, respectively.HFor the majority of commercial applications, a copper content of up to 0.7 % will not adversely affect the serviceability of die castings and sho
34、uld not serve as a basisfor rejection, unless otherwise specified in the contract or purchase order between the producer and user, such as to meet the requirements of ISO 15201.IDetermined arithmetically by difference. Corrected editorially.B86112purchase order, as additional procedures and extended
35、 deliverytime may be involved.4.2.1 Chemical analysis (6.1.1),4.2.2 Quality assurance (Section 15),4.2.3 Special proof tests or mechanical properties (Section7),4.2.4 General quality options for internal soundness or forfinish (Section 14),4.2.5 Source inspection (Section 9),4.2.6 Certification (Sec
36、tion 11),4.2.7 Marking for identification (Section 12), and4.2.8 Special packaging (Section 13).5. Material5.1 The metal used in the manufacture of die castings shallbe zinc alloy of a specified chemical composition conformingto the requirements of Specification B240.6. Chemical Requirements6.1 Limi
37、tsThe casting shall conform to the requirementsas to chemical composition prescribed in Table 1. Confor-mance shall be determined by the producer by analyzingsamples taken at the time that castings are made. If theproducer has determined the chemical composition of the metalduring the course of manu
38、facture, he shall not be required tosample and analyze the finished product.NOTE 1The chemical compositions prescribed in Table 1 (not includ-ing the footnotes) for Alloys 3, 5, 2, ZA-8, ZA-12, and ZA-27 conform tothe prescribed chemical compositions in ISO 15201.6.1.1 When a detailed chemical analy
39、sis is required with ashipment, it shall be called for in the contract or purchase order.6.1.2 If the producers or suppliers method of compositioncontrol is acceptable, sampling for chemical composition maybe waived at the discretion of the purchaser.6.2 Number of SamplesWhen required, samples for d
40、eter-mination of chemical composition shall be taken to representthe following:6.2.1 A sample shall be taken from each of two representa-tive castings selected from each lot defined in 15.2.6.3 Methods of SamplingSee appropriate sections withinSection 6 of Specification B949 for methods of sampling.
41、6.4 Method of AnalysisThe determination of chemicalcomposition shall be made in accordance with suitable analyti-cal methods. In case of dispute, the results secured by anapproved method (or combination of approved methods), or bya method agreed upon by both parties, shall be the basis ofacceptance.
42、6.4.1 Approved methods include: Test Methods E536,ISO 3815-1,orISO 3815-2.NOTE 2Test Methods E536 is directly applicable, in an unmodifiedform, only to alloys 3, 5, and 7. ISO 3815-1 and ISO 3815-2 are genericmethods applied to zinc and zinc alloys. Each of the methods may bemodified and formatted f
43、or the alloy to be assayed. An experiencedchemist, using suitable and/or traceable standards along with valid qualityassurance techniques, will be able to perform and validate the methodsand demonstrate acceptable precision and accuracy.7. Physical Properties, Mechanical Properties and Tests7.1 Unle
44、ss specified in the contract or purchase order, orspecified on the detail drawing, acceptance of castings underthis specification shall not depend on mechanical propertiesdetermined by tension or impact tests.7.1.1 Appendix X2 shows typical mechanical properties,determined on separately cast test ba
45、rs produced under care-fully controlled conditions.7.1.2 While these typical mechanical properties of sepa-rately cast test bars are useful for comparing the relativeproperties of various casting alloys, they should not be used toestablish design limits or acceptance criteria.7.1.3 If tension or imp
46、act tests are made on separately casttest bars, test specimens conforming to the dimensions shownin Test Methods B557 (the figure entitled, Standard TensionTest Specimen for Die Castings), Test Methods E8, (the figureentitled Standard Test Specimen for Cast Iron), and of TestMethods E23 (the figure
47、entitled, Charpy (Simple-Beam)Impact Test Specimens, Types A, B, and C) shall be used, andprocess operating variables shall be optimized for the specificmold or die being used.7.1.4 When specified in the contract or purchase order,castings shall withstand proof tests without failure as definedby agr
48、eement between the purchaser and the producer orsupplier.7.2 Appendix X3 shows typical physical properties of zincand zinc-aluminum (ZA) casting alloys and does not constitutea part of this specification but is provided for informationalpurposes only.8. Dimensions, Mass, and Permissible Variations8.
49、1 Permissible variations in dimensions shall be within thelimits specified on the drawings or in the contract or purchaseorder.8.1.1 For die castings, any dimensions for which a toleranceis not specified shall be in accordance with NADCA ProductSpecification Standards for Die Castings.8.2 Dimensional tolerance deviations waived by the pur-chaser shall be confirmed in writing to the producer or supplier.9. Source Inspection9.1 See Section 9 of Specification B949.10. Rejection and Rehearing10.1 See Specification B949, Sections 8.1 through 8.3.11. Certifica
