1、Designation: B86 11B86 13Standard 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
2、revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon () 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, zi
3、nc-aluminum castings and continuous cast bar stock, as designated andspecified in Table 1. Seven alloy compositions are specified and designated as follows:Common Traditional ASTMA UNSAlloy 3 Zamak 3 AG 40AB Z33520Alloy 7 Zamak 7 AG 40B Z33523Alloy 5 Zamak 5 AC 41AB Z35531Alloy 2 Zamak 2 AC 43A Z355
4、41ZA-8 ZA-8 . Z35636ZA-12 ZA-12 . Z35631ZA-27 ZA-27 . Z35841_Common Traditional ASTMA UNSAlloy 3 Zamak 3 AG 40AB Z33525Alloy 7 Zamak 7 AG 40B Z33527Alloy 5 Zamak 5 AC 41AB Z35533Alloy 2 Zamak 2 AC 43A Z35545ZA-8 ZA-8 . Z35638ZA-12 ZA-12 . Z35633ZA-27 ZA-27 . Z35841A See Table 1, Footnote C.B SAE Spe
5、cification, Nos. 903 and 925 conform to the requirements for alloys AG40A and AC41A, respectively.1.2 Zinc Alloys Z33520, Z33523, Z35531, and Z35541Z33525, Z33527, Z35533, and Z35545 are used primarily in themanufacture of pressure die castings. Zinc-Aluminum Alloys Z35636, Z35631,Z35638, Z35633, an
6、d Z35841 are used in themanufacture of both foundry and pressure die castings. These alloys are also fabricated into continuous cast bar stock used forprototyping and screw machine stock.1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mat
7、hematicalconversions to SI units that are provided for information only and are not considered standard.1.4 Systems of nomenclature used to designate zinc and zinc-aluminum (ZA) alloys used for casting are described in AppendixX1.1.5 This standard does not purport to address all of the safety concer
8、ns, if any, associated with its use. It is the responsibilityof the user of this standard to become familiar with all hazards including those identified in the appropriate Material Safety DataSheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and
9、health practices, anddetermine the applicability of regulatory limitations prior to use.1 This specification is under the jurisdiction of ASTM Committee B02 on Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee B02.04 on Zincand Cadmium.Current edition approved June 1, 201
10、1Feb. 1, 2013. Published July 2011March 2013. Originally approved in 1931. Last previous edition approved in 20102011 asB86 - 10a.B86 11. DOI: 10.1520/B0086-11.10.1520/B0086-13.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what ch
11、anges have been made to the previous version. Becauseit 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 versionof the standard as published by ASTM is to be considered the off
12、icial document.*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 States12. Referenced Documents2.1 The following documents of the issue in effect on date of order acceptance form
13、 a part of this specification to the extentreferenced herein:2.2 ASTM Standards:2B240 Specification for Zinc and Zinc-Aluminum (ZA) Alloys in Ingot Form for Foundry and Die CastingsB275 Practice for Codification of Certain Nonferrous Metals and Alloys, Cast and WroughtB557 Test Methods for Tension T
14、esting Wrought and Cast Aluminum- and Magnesium-Alloy ProductsB899 Terminology Relating to Non-ferrous Metals and AlloysB949 Specification for General Requirements for Zinc and Zinc Alloy ProductsE8 Test Methods for Tension Testing of Metallic MaterialsE23 Test Methods for Notched Bar Impact Testing
15、 of Metallic MaterialsE29 Practice for Using Significant Digits in Test Data to Determine Conformance with SpecificationsE88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical CompositionE527 Practice for Numbering Metals and Alloys in the Unified Numbering
16、 System (UNS)E536 Test Methods for Chemical Analysis of Zinc and Zinc AlloysE634 Practice for Sampling of Zinc and Zinc Alloys by Spark Atomic Emission Spectrometry2.3 North American Die Casting Association (NADCA):3NADCA Product Specification Standards for Die Castings2.4 Federal Standard:4Fed. Std
17、. No. 123 Marking for Shipment (Civil Agencies)2.5 Military Standard:4MIL-STD-129 Marking for Shipment and Storage (Military Agencies)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 alloysCastingsSp
18、ecifications2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 Available from North American Die Casting, Assn
19、., 2000 5th Ave., River Grove, IL 60171, http:/www.diecasting.org.4 Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.5 Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
20、 4th Floor, New York, NY 10036, http:/www.ansi.org.TABLE 1 Chemical Requirementscolwidth=“0.87in“/COLSPECElementAlloy 3A,B,C,DZamak 3(AG40A)Z33520Alloy 7A,B,C,D,EZamak 7(AG40B)Z33523Alloy 5A,B,C,DZamak 5(AC41A)Z35531Alloy 2A,C,DZamak 2(AC43A)Z35541 ZA-8A,C,FZA-8Z35636ZA-12A,C,FZA-12Z35631ZA-2ZA-27A,
21、C,FZA-27Z35841(Z33525) (Z33527) (Z35533) (Z35545) (Z35638) (Z35633) (Z35841)Aluminum 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 0.02-0.06G 0.005-0.020 0.02-0.06G 0.02-0.06 0.01-0.03 0.01-0.03 0.01-0.02Copper 0.1 maxH 0.1 maxE 0.7-1.2 2.6-3.3 0.8-1.3 0.5-1.2 2.0-2.5Iron, max
22、 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 . . . 0.005-0.020 . . . . . . . . . . . . . . .ZincI remainder remainder remainder remainder remaind
23、er remainder remainderA For 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 in expressing the specified limit, in accordance with the rounding procedure prescribed i
24、n Practice E29.B Zinc 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 these elements in these concentrations and, therefore, analyses are not required for thes
25、e elements, with the exception of nickel analysisfor Z33522.Z33527.C ASTM alloy designations were established in accordance with Practice B275. The UNS designations were established in accordance with Practice E527. The last digitof a UNS number differentiates between alloys of similar composition.
26、The UNS designations for ingot and casting versions of an alloy were not assigned in the samesequence for all alloys.D When this material is required to conform to ISO 301, the chemical limits for thallium and indium each shall not exceed 0.001 %.E For the majority of commercial applications, a copp
27、er content up to 0.25 % will not adversely affect the serviceability of these die castings and should not serve as a basisfor rejection, unless otherwise specified in the contract or purchase order between the producer and user.F Zinc-aluminum ingot for foundry and pressure die casting may contain c
28、hrome, manganese, or nickel in amounts of up to 0.01 % each or 0.03 % total. No harmful effectshave ever been noted due to the presence of these elements in up to these concentrations and, therefore, analyses are not required for these elements.G Magnesium may be as low as 0.015 % provided that the
29、lead, cadmium, and tin do not exceed 0.003, 0.003, and 0.001 %, respectively.H For the majority of commercial applications, a copper content of up to 0.7 % will not adversely affect the serviceability of die castings and should not serve as a basisfor rejection, unless otherwise specified in the con
30、tract or purchase order between the producer and user, such as to meet the requirements of ISO 15201.I Determined arithmetically by difference.B86 132ISO 3815-1 Zinc and zinc alloysPart 1: Analysis of solid samples by optical emission spectrometryISO 3815-2 Zinc and zinc alloysPart 2: Analysis by in
31、ductively coupled plasma optical emission spectrometry3. Terminology3.1 Terms shall be defined in accordance with Terminology B899.3.2 Definitions of Terms Specific to This Standard:3.2.1 continuous casting, na casting technique in which a cast is continuously withdrawn through the bottom of the mol
32、d asit solidifies, so that its length is not determined by mold dimensions; used chiefly to produce semifinished mill products such asbillets, blooms, ingots, slabs, and tubes; also known as concast.3.2.2 die casting, na casting process in which molten metal is injected under high velocity and press
33、ure into a metal die andsolidified, also a product produced by such a process. Alternately known as pressure die casting.3.2.3 foundry casting, nmetal object produced by introducing molten metal by gravity into a mold of any type and allowingit to solidify.3.2.4 permanent mold casting, nmetal object
34、 produced by introducing molten metal by gravity or low pressure into a moldconstructed of durable material, usually iron or steel, and allowing it to solidify. When a graphite mold is used the process is knownas graphite permanent mold casting.3.2.5 sand casting, nmetal object produced by introduci
35、ng molten metal by gravity into a sand mold and allowing it tosolidify.3.2.6 semipermanent mold casting, npermanent mold casting which is made using an expendable core such as sand.4. Ordering Information4.1 Orders for die castings shall include the following basic information in addition to the req
36、uirements listed in SpecificationB949:4.1.1 Alloy (Table 1), and4.1.2 Drawing of casting, when required, giving all necessary dimensions and showing latest revisions and allowances formatching, if any. Location of ejector pin marks or parting lines shall be at the option of the producer, unless spec
37、ifically designatedon the drawing.4.2 Additional tests, options, and special inspection requirements as provided as follows should be justified only on the basisof need. These shall be specified in the contract or purchase order, as additional procedures and extended delivery time may beinvolved.4.2
38、.1 Chemical analysis (6.1.1),4.2.2 Quality assurance (Section 15),4.2.3 Special proof tests or mechanical properties (Section 7),4.2.4 General quality options for internal soundness or for finish (Section 14),4.2.5 Source inspection (Section 9),4.2.6 Certification (Section 11),4.2.7 Marking for iden
39、tification (Section 12), and4.2.8 Special packaging (Section 13).5. Material5.1 The metal used in the manufacture of die castings shall be zinc alloy of a specified chemical composition conforming tothe requirements of Specification B240.6. Chemical Requirements6.1 LimitsThe casting shall conform to
40、 the requirements as to chemical composition prescribed in Table 1. Conformance shallbe determined by the producer by analyzing samples taken at the time that castings are made. If the producer has determined thechemical composition of the metal during the course of manufacture, he shall not be requ
41、ired to sample and analyze the finishedproduct.NOTE 1The chemical compositions prescribed in Table 1 (not including the footnotes) for Alloys 3, 5, 2, ZA-8, ZA-12, and ZA-27 conform to theprescribed chemical compositions in ISO 15201.6.1.1 When a detailed chemical analysis is required with a shipmen
42、t, it shall be called for in the contract or purchase order.6.1.2 If the producers or suppliers method of composition control is acceptable, sampling for chemical composition may bewaived at the discretion of the purchaser.6.2 Number of SamplesWhen required, samples for determination of chemical com
43、position shall be taken to represent thefollowing:B86 1336.2.1 A sample shall be taken from each of two representative castings selected from each lot defined in 15.2.6.3 Methods of SamplingSee appropriate sections within Section 6 of Specification B949 for methods of sampling.6.4 Method of Analysis
44、The determination of chemical composition shall be made in accordance with suitable analyticalmethods. In case of dispute, the results secured by an approved method (or combination of approved methods), or by a methodagreed upon by both parties, shall be the basis of acceptance.6.4.1 Approved method
45、s include: Test Methods E536, ISO 3815-1, or ISO 3815-2.NOTE 2Test Methods E536 is directly applicable, in an unmodified form, only to alloys 3, 5, and 7. ISO 3815-1 and ISO 3815-2 are generic methodsapplied to zinc and zinc alloys. Each of the methods may be modified and formatted for the alloy to
46、be assayed. An experienced chemist, using suitableand/or traceable standards along with valid quality assurance techniques, will be able to perform and validate the methods and demonstrate acceptableprecision and accuracy.7. Physical Properties, Mechanical Properties and Tests7.1 Unless specified in
47、 the contract or purchase order, or specified on the detail drawing, acceptance of castings under thisspecification shall not depend on mechanical properties determined by tension or impact tests.7.1.1 Appendix X2 shows typical mechanical properties, determined on separately cast test bars produced
48、under carefullycontrolled conditions.7.1.2 While these typical mechanical properties of separately cast test bars are useful for comparing the relative properties ofvarious casting alloys, they should not be used to establish design limits or acceptance criteria.7.1.3 If tension or impact tests are
49、made on separately cast test bars, test specimens conforming to the dimensions shown in TestMethods B557 (the figure entitled, Standard Tension Test Specimen for Die Castings), Test Methods E8, (the figure entitledStandard Test Specimen for Cast Iron), and of Test Methods E23 (the figure entitled, Charpy (Simple-Beam) Impact TestSpecimens, TypesA, B, and C) shall be used, and process operating variables shall be optimized for the specific mold or die beingused.7.1.4 When specified in the contract or purchase order, castings shall withstand proof te
