1、Designation: B989 14Standard Specification forHigh Fluidity (HF) Zinc-Aluminum Alloy in Ingot Form forThin Wall Die Castings1This standard is issued under the fixed designation B989; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision,
2、the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers a commercial zinc-aluminumalloy in ingot form for remelting for the manufacture
3、of thinwall pressure die castings as designated and specified in Table1.1.2 Systems of nomenclature used to designate zinc andzinc-aluminum (ZA) alloys used for casting are described inAppendix X1.1.3 The values stated in inch-pound units are to be regardedas standard. The values given in parenthese
4、s are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 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 become familiarwith all ha
5、zards including those identified in the appropriateMaterial Safety Data Sheet (MSDS) for this product/materialas provided by the manufacturer, to establish appropriatesafety and health practices, and determine the applicability ofregulatory limitations prior to use.2. Referenced Documents2.1 The fol
6、lowing documents of the issue in effect on dateof order acceptance form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B897 Specification for Configuration of Zinc and Zinc AlloyJumbo, Block, Half Block, and Slab IngotB899 Terminology Relating to Non-ferrous Metals a
7、nd Al-loysB908 Practice for the Use of Color Codes for Zinc CastingAlloy IngotB949 Specification for General Requirements for Zinc andZinc Alloy ProductsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE527 Practice for Numbering Metals and Alloys in
8、theUnified Numbering System (UNS)E536 Test Methods for Chemical Analysis of Zinc and ZincAlloys2.3 ISO Standards:3ISO 38151 Zinc and zinc alloys Part 1: Analysis of solidsamples by optical emission spectrometryISO 38152 Zinc and zinc alloys Part 2: Analysis byinductively coupled plasma optical emiss
9、ion spectrometry3. Terminology3.1 Terms shall be defined in accordance with TerminologyB899.3.2 Definitions of Terms Specific to This Standard:3.2.1 die casting, na casting process in which moltenmetal is injected under high velocity and pressure into a metaldie and solidified, also a product produc
10、ed by such a process;alternately known as pressure die casting.3.2.2 high fluidity alloy, na zinc alloy by nature of itscomposition is capable of producing die castings with thinnerwall sections compared to typical die cast alloys; often lessthan 0.012 in. (0.30 mm) in thickness.3.2.3 thin wall die
11、casting, na die casting with wallsections that can be less than 0.012 in. (0.30 mm) in thickness.4. Ordering Information (See Specification B949)5. Chemical Requirements5.1 The ingots shall conform to the requirements as tochemical composition as prescribed in Table 1. Conformanceshall be determined
12、 in accordance with Specification B949,Sections 5.2 and 5.2.1.1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.04 on Zinc and Cadmium.Current edition approved June 1, 2014. Published June 2014. DOI:
13、 10.1520/B0989-14.2For 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.3Available from American National Standards
14、 Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States16. Sampling for Determination of Chemical Composition(See Specification B949)7. Methods for Chemical A
15、nalysis7.1 The determination of chemical composition shall bemade in accordance with Specification B949, Section 5.2.2.7.2 In case of dispute, the results secured by an approvedmethod (or combination of approved methods), or by a methodagreed upon by both parties, shall be the basis of acceptance.7.
16、2.1 Approved methods include: Test Methods E536, ISO38151, or ISO 38152.7.2.1.1 Test Methods E536 is generally applicable, but mustbe slightly modified to cover the higher Al range. ISO 38151and ISO 38152 are generic methods applied to zinc and zincalloys. Each of the methods may be modified and for
17、matted forthe alloy to be assayed. An experienced chemist, using suitableand/or traceable standards along with valid quality assurancetechniques, will be able to perform and validate the methodsand demonstrate acceptable precision and accuracy.7.3 For purposes of determining compliance with specifie
18、dcomposition limits as given in Table 1, an observed orcalculated value shall be rounded to the nearest unit in the lastright-hand place of figures shown in Table 1, in accordancewith the rounding method of Practice E29.8. Materials and Manufacturer (See Specification B949)9. Physical Properties NA1
19、0. Mechanical Properties NA11. Dimensions, Mass, and Permissible Variation, andShapes and Sizes11.1 Zinc casting alloy ingots are typically supplied in ingotbundles weighing 1700 to 2400 lb (770 to 1090 kg).11.2 Ingots and bundles vary in size and weight dependingon the alloy and supplier.11.2.1 Sta
20、ndard ingots have a nominal weight in the rangeof 17 to 24 lb (8 to 11 kg) and are generally 24 to 26 in. (61 to66 mm) long.11.3 Margash bars or ingots come in two sizes with anominal weight in the range of either 12 to 14 lb (5 to 6 kg) or20 to 24 lb (9 to 11 kg).11.4 Zinc casting alloy ingot may b
21、e ordered in jumbos orblocks, as specified in Specification B897.11.5 Zinc casting alloy ingot may also be ordered in othershapes.12. Workmanship, Finish, Appearance NA13. Inspection (See Specification B949)14. Rejection and Rehearing (See Specification B949)15. Certification (See Specification B949
22、)16. Product and Package Marking, Packaging andPreparation for Delivery (See Specification B949)17. Keywords17.1 castings; die castings; high fluidity; high fluidity alloy;pressure die castings; thin wall die casting; zinc; zinc-aluminum alloy; zinc metalTABLE 1 Chemical and North American Color Cod
23、eRequirementsCommon Name HF AlloyA,B,CUNS to be assignedColor CodeDRed/BrownElementAluminum 4.34.7Magnesium 0.0050.012Copper, max 0.035Iron, max 0.03Lead, max 0.003Cadmium, max 0.002Tin, max 0.001ZincERemainderAZinc alloy ingots for die casting may contain nickel, chromium, silicon, andmanganese in
24、amounts of up to 0.01, 0.01, 0.01, and 0.01 %, respectively. Noharmful effects have ever been noted due to the presence of these elements in upto these concentrations and, therefore, analyses are not required for theseelements.BThe last digit of a UNS number differentiates between alloys of similarc
25、omposition. UNS designations for ingot and casting versions of an alloy were notassigned in the same sequence for alloys.CFor purposes of acceptance and rejection, the observed value or calculatedvalue obtained from analysis should be rounded to the nearest unit in the lastright-hand place of figure
26、s, used in expressing the specified limit, in accordancewith the rounding procedure prescribed in Practice E29.DRefer to Practice B908 (Note: Colors indicated are for North Americanapplications.)EDetermined arithmetically by difference.B989 142APPENDIX(Nonmandatory Information)X1. NOMENCLATURE SYSTE
27、MS FOR ZINC AND ZINC-ALUMINUM (ZA) ALLOYSX1.1 The information in this appendix does not constitute apart of this specification but is provided for informationalpurposes only. The nomenclature covers a commercial zinc-aluminum alloy in ingot form for remelting for the manufactureof pressure die casti
28、ngs as designated and specified in Table 1.X1.2 Several different systems of nomenclature haveevolved over the years to designate the zinc alloys used forcasting as listed in Table X1.1.X1.2.1 Common names refer to the established and com-mon reference to the zinc casting alloy.X1.2.2 UNS numbers ar
29、e established in Practice E527 (SAEJ1086) as part of a Unified Numbering System to provideunique designations for each metal grade and alloy in useworldwide. Zinc alloys start with the prefix “Z” followed byfive numbers. The first digit is based on the major alloyingelement, the second digit provide
30、s a further sub-classificationbased on secondary and tertiary alloying elements, the thirddigit designates the nominal composition of the major alloyingelement, the fourth digit designates the nominal concentrationof the second most important alloying element, and the fifthdigit allows a unique numb
31、er to be established to differentiatebetween similar compositions.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any s
32、uch patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invi
33、ted either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received
34、a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of thi
35、s standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE X1.1 Nomenclature Systems for Zinc-Aluminum AlloysCommon UNSHF alloy to be assignedB989 143
