ASTM B86-2018 Standard Specification for Zinc and Zinc-Aluminum (ZA) Alloy Foundry and Die Castings.pdf

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1、Designation: B86 13B86 18Standard 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 U.S. Department of Defense.1. Scope*1.1 This specification covers commercial zin

3、c, zinc-aluminum castings and continuous cast bar stock, as designated andspecified in Table 1. SevenEight alloy compositions are specified and designated as follows: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 A

4、C 43A Z35545ZA-8 ZA-8 . Z35638ZA-12 ZA-12 . Z35633ZA-27 ZA-27 . Z35841ACuZinc 5C . Z46541A See Table 1, Footnote C.B SAE Specification, Nos. 903 and 925 conform to the requirements for alloys AG40A and AC41A, respectively.C ACuZinc and ACuZinc5 are registered trade names of the General Motors Corpor

5、ation.1.2 Zinc Alloys Z33525, Z33527, Z35533, and Z35545 are used primarily in the manufacture of pressure die castings.Zinc-AluminumAlloys Z35638, Z35633, and Z35841 are used in the manufacture of both foundry and pressure die castings. Thesealloys are also fabricated into continuous cast bar stock

6、 used for prototyping 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 mathematicalconversions to SI units that are provided for information only and are not considered standard.1.4 Systems of nomenclature used to d

7、esignate 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 concerns, if any, associated with its use. It is the responsibilityof the user of this standard to become familiar with all hazards including those

8、 identified in the appropriate Material Safety DataSheet (MSDS)(SDS) for this product/material as provided by the manufacturer, to establish appropriate safety safety, health, andhealthenvironmental practices, and determine the applicability of regulatory limitations prior to use.1.6 This internatio

9、nal standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization Technical Barriers to Trade (TBT) Committee

10、.2. Referenced Documents2.1 The following documents of the issue in effect on date of order acceptance form 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 Castings1 This speci

11、fication 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 Feb. 1, 2013Nov. 1, 2018. Published March 2013December 2018. Originally approved in 1931. Last previous edition

12、 approved in 20112013 asB86 11.13. DOI: 10.1520/B0086-13.10.1520/B0086-18.2 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 standardsstandards Document Summary pag

13、e on the ASTM website.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. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that u

14、sers consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Cons

15、hohocken, PA 19428-2959. United States1TABLE 1 Chemical RequirementsElementAlloy 3A,B,C,DZamak 3(AG40A)Alloy 7A,B,C,D,EZamak 7(AG40B)AlloyZamak(AC41A)(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

16、 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 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

17、0.002 0.002 0.003 0.003 0.003Nickel . . . 0.005-0.020 . . . . . . . . . . . . . . .ZincI remainder remainder remainder remainder remainder remainder remainderTABLE 1 Chemical RequirementsElementsCommon Name TraditionalName ASTMDesignation UNS Al Mg Cu Fe Pb Cd Sn NiAlloy 3A,B,C,D Zamak 3 (AG40A) Z33

18、525 3.7-4.3 0.02-0.06 0.10 0.05 0.0050 0.0040 0.002 .Alloy 7A,B,C,D,E Zamak 7 (AG40B) Z33527 3.7-4.3 0.005-0.020 0.10 0.05 0.0030 0.0020 0.0010 0.005-0.020Alloy 5A,B,C,D Zamak 5 (AG41A) Z35533 3.7-4.3 0.02-0.06 0.7-1.2 0.05 0.0050 0.0040 0.002 .Alloy 2A,C,D Zamak 2 (AG43A) Z35545 3.7-4.3 0.02-0.05 2

19、.6-3.3 0.05 0.0050 0.0040 0.002 .ZA-8A,C,F ZA-8 Z35638 8.0-8.8 0.01-0.03 0.8-1.3 0.075 0.006 0.006 0.003 .ZA-12A,C,F ZA-12 Z35633 10.5-11.5 0.01-0.03 0.5-1.2 0.075 0.006 0.006 0.003 .ZA-27A,C,F ZA-27 Z35841 25.0-28.0 0.01-0.020 2.0-2.5 0.075 0.006 0.006 0.003 .ACuZinc5A,C,F ACuZinc5 Z46541 2.5-3.3 0

20、.025-0.05 5.0-6.0 0.075 0.005 0.004 0.003 .A 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-hand place of figures, used in expressing the specifiedlimit, in accordance with the rounding p

21、rocedure prescribed in 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 been noted due to the presence of these elementsin these concentrations and, therefore, analyses are

22、not required for these elements, with the exception of nickel analysis for Z33527.C ASTM alloy designations were established in accordance with Practice B275. The UNS designations were established in accordance with Practice E527. The last digit of a UNS number differentiates between alloysof simila

23、r composition. The UNS designations for ingot and casting versions of an alloy were not assigned in the same sequence 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 appl

24、ications, a copper content up to 0.25 % will not adversely affect the serviceability of these die castings and should not serve as a basis for rejection, unless otherwise specified inthe contract or purchase order between the producer and user.F Zinc-aluminum ingot for foundry and pressure die casti

25、ng may contain chrome, manganese, or nickel in amounts of up to 0.01 % each or 0.03 % total. No harmful effects have ever been noted due to the presenceof 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 % pr

26、ovided that the 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 basis for rejection, unless otherwise spe

27、cified in the contractor purchase order between the producer and user, such as to meet the requirements of ISO 15201.I Determined arithmetically by difference.B86182B275 Practice for Codification of Certain Zinc, Tin and Lead Die CastingsB557 Test Methods for Tension Testing Wrought and Cast Aluminu

28、m- and Magnesium-Alloy ProductsB899 Terminology Relating to Non-ferrous Metals and AlloysB949 Specification for General Requirements for Zinc and Zinc Alloy ProductsE8E8/E8M Test Methods for Tension Testing of Metallic Materials Metric E0008_E0008ME23 Test Methods for Notched Bar Impact Testing of M

29、etallic 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 Syst

30、em (UNS)E536 Test Methods for Chemical Analysis of Zinc and Zinc AlloysE634 Practice for Sampling of Zinc and Zinc Alloys for Analysis by Spark Atomic Emission Spectrometry2.3 North American Die Casting Association (NADCA):3NADCA Product Specification Standards for Die Castings2.4 Federal Standard:4

31、Fed. Std. 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 alloysCa

32、stingsSpecificationsISO 3815-1 Zinc and zinc alloysPart 1: Analysis of solid samples by optical emission spectrometryISO 3815-2 Zinc and zinc alloysPart 2: Analysis by inductively coupled plasma optical emission spectrometry3. Terminology3.1 Terms shall be defined in accordance with Terminology B899

33、.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 mold asit solidifies, so that its length is not determined by mold dimensions; used chiefly to produce semifinished mill products suc

34、h 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 pressure into a metal die andsolidified, also a product produced by such a process. Alternately known as pressure die casting.3.2.3 fou

35、ndry 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 produced by introducing molten metal by gravity or low pressure into a moldconstructed of durable material, usually iron or steel

36、, 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 introducing molten metal by gravity into a sand mold and allowing it tosolidify.3.2.6 semipermanent mold casting, npermanent mold casting w

37、hich 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 requirements listed in SpecificationB949:4.1.1 Alloy (Table 1), and4.1.2 Drawing of casting, when required, giving all necessary dime

38、nsions 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 specifically designatedon the drawing.4.2 Additional tests, options, and special inspection requirements as provided as follows should

39、 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.3 Available from North American Die Casting, Assn., 2000 5th Ave., River Grove, IL 60171, http:/www.diecasting.org.4 Available from S

40、tandardization 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., 4th Floor, New York, NY 10036, http:/www.ansi.org.B86 1834.2.1 Chemical analysis (6

41、.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 identification (Section 12)

42、, 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 the requirements as to

43、 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 required to sample and anal

44、yze 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 shipment, it shall be called f

45、or 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 composition shall be taken

46、 to represent thefollowing:following (Also, see appropriate requirements in Specification B949.):6.2.1 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 me

47、thods of sampling.6.4 Method of AnalysisThe 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 b

48、asis of acceptance.6.4.1 Approved methods 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

49、modified and formatted for the alloy to 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 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 t