1、Designation: B 952 08Standard Specification forZinc Alloys in Ingot Form for Spin Casting1This standard is issued under the fixed designation B 952; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A numbe
2、r in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification covers zinc alloys in ingot form forremelting for the manufacture of Spin Castings as specified anddesignated, as shown
3、in Table 1. Four alloy compositions arespecified, designated as follows:Common UNSSpin Casting Alloy SC-A .Spin Casting Alloy SC-B .Spin Casting Alloy SC-C .ZA-73 .1.2 Zinc alloys #2, #3, #5, and ZA-8 specified in Specifi-cation B 240 are also used in the spin casting process.1.3 The values stated i
4、n SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.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 hazards incl
5、uding 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 following doc
6、uments of the issue in effect on dateof order acceptance form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2B 240 Specification for Zinc and Zinc-Aluminum (ZA)Alloys in Ingot Form for Foundry and Die CastingsB 899 Terminology Relating to Non-ferrous Metals andAlloys
7、B 908 Practice for the Use of Color Codes for Zinc CastingAlloy IngotE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE47 Test Methods for Chemical Analysis of Zinc Die-Casting Alloys3E88 Practice for Sampling Nonferrous Metals and Alloysin Cast Form
8、for Determination of Chemical CompositionE 536 Test Methods for ChemicalAnalysis of Zinc and ZincAlloysE 634 Practice for Sampling of Zinc and Zinc Alloys forOptical Emission Spectrometric Analysis2.3 ISO Standards:4ISO 3815-1 Zinc and zinc alloys Part 1:Analysis of solidsamples by optical emission
9、spectrometryISO 3815-2 Zinc and zinc alloys Part 2: Analysis byinductively coupled plasma optical emission3. Terminology3.1 Terms shall be defined in accordance with TerminologyB 899.3.2 Definitions of Terms Specific to This Standard:3.3 spin casting, na casting process in which moltenmetal is poure
10、d into a rubber, polymer, graphite or metal moldand spun centrifugally until solidified, also a product producedby such a process.4. Ordering Information4.1 Orders for ingots under this specification shall includethe following information:4.1.1 Quantity in pounds,4.1.2 Alloy (Table 1),4.1.3 Size, if
11、 not the manufacturers standard,4.1.4 Specification number and date,4.1.5 Source inspection (Section 7), and4.1.6 Marking (Section 9).5. Materials and Manufacture5.1 The alloys may be made by any approved process.5.2 The material covered by this specification shall be ofuniform quality and shall be
12、free from dross or other harmfulcontamination.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 Nov. 1, 2008. Published December 2008. Originallyapprov
13、ed in 2007. Last previous edition approved in 2007 as B 952 - 07.2For 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 webs
14、ite.3Withdrawn.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 194
15、28-2959, United States.6. Chemical Requirements6.1 LimitsThe alloy shall conform to the requirements asto chemical composition prescribed in Table 1. Conformanceshall be determined by the producer by analyzing samplestaken at the time the ingots are made. If the producer hasdetermined the chemical c
16、omposition of the metal during thecourse of manufacture, it shall not be required to sample andanalyze the finished product.6.2 In case of dispute, the following requirements shallapply:6.2.1 Number of SamplesSamples for verification ofchemical composition shall be taken as follows:6.2.2 If the ingo
17、ts are shipped in carload lots of the samealloy, not less than five (5) ingots shall be taken at random fromthe carload for sampling. If the shipment is less than a carloadlot, one (1) sample ingot shall be taken from each 10 000 lb. orfraction thereof. When it is deemed necessary, a sample may beta
18、ken from each melt of 1000 lb. or more.6.3 Methods of SamplingSamples from ingots for deter-mination of chemical composition shall be taken in accordancewith one of the following methods:6.3.1 Samples for chemical analysis shall be taken from thematerial by drilling, sawing milling, turning, or clip
19、ping arepresentative piece or pieces to obtain weight of preparedsample not less than 100 g. Sampling shall be in accordancewith Practice E88.6.3.2 By agreement, an optional method of sampling foranalysis may be by melting together representative portions ofeach ingot selected, and then sampling the
20、 liquid composite bycasting suitable specimens for either spectrographic or chemi-cal analysis.6.4 Method of AnalysisThe determination of chemicalcomposition shall be made in accordance with suitable chemi-cal (Test Methods E 536 or Test Methods E47for tin), suitablespectrochemical methods ISO 3815-
21、1 and ISO 3815-2, or othermethods. In case of dispute, the results should preferably besecured by Test Methods E 536 and Test Methods E47for tinonly, or ISO 3815-1 or ISO 3815-2 and shall be the basis ofacceptance.6.5 Samples for spectrochemical and other methods ofanalysis shall be suitable for the
22、 form of material beinganalyzed and the type of analytical method used (for example,see Practice E 634.7. Source Inspection7.1 If the purchaser desires that his representative inspect orwitness the inspection and testing of the product prior toshipment, such agreement shall be made by the purchaser
23、andproducer or supplier as part of the contract or purchase order.7.2 When such inspection or witness of inspection andtesting is agreed upon, the producer or supplier shall afford thepurchasers representative all reasonable facilities to satisfyhim that the product meets the requirements of this sp
24、ecifica-tion. Inspection and tests shall be conducted so there is nounnecessary interference with the producers operations.8. Rejection and Rehearing8.1 Material that fails to conform to the requirements of thisspecification may be rejected. Rejection should be reported tothe producer or supplier pr
25、omptly and in writing. In case ofdissatisfaction with the results of the test, the producer orsupplier may make claim for a rehearing. If the rehearingestablishes that the material does not conform to the require-ments of this specification, as much of the rejected originalmaterial as possible shall
26、 be returned to the producer orsupplier.9. Identification Marking9.1 All ingots shall be properly marked for identificationwith the producers name or brand.9.2 Each bundle or skid shall be identified with the produc-ers heat, lot or other identification mark.9.3 Each ingot, bundle or skid shall be m
27、arked with theappropriate Color Code for the alloy as per North Americanrequirements in Practice B 908.10. Preparation for Delivery10.1 PackagingUnless otherwise specified, the ingot shallbe packaged to provide adequate protection during normalhandling and transportation. Each package shall contain
28、onlyone alloy unless otherwise agreed upon.11. Keywords11.1 casting; casting alloys; centrifugical casting; prototyp-ing; rubber mold; SC-A; SC-B; SC-C; silicon mold; spincasting; ZA alloys; Zamak; ZA-73; zinc; zinc-aluminum alloysTABLE 1 Chemical and North American Color Code RequirementsAlloy SC-A
29、 Alloy SC-B Alloy SC-C ZA-73Color CodeA. . . .ElementBAluminum 3.94.3 3.94.3 3.44.6 7.78.0Magnesium 0.10.2 0.40.6 0.40.43 0.020.03Copper 2.62.9 2.73.3 1.31.4 3.03.3Iron, max 0.035 0.035 0.10 0.075Lead, max 0.004 0.004 0.015 0.005Cadmium, max 0.0030 0.0030 0.005 0.003Tin, max 0.0015 0.0015 0.005 0.00
30、2Nickel, max . . 0.02 .Zinc Remainder Remainder Remainder RemainderAPer Practice B 908.BFor 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 specifi
31、c limit in accordance with the rounding procedure prescribed in Practice E29.B952082SUMMARY OF CHANGESCommittee B02 has identified the location of selected changes to this standard since the last issue (B 952 - 07)that may impact the use of this standard. (Approved November 1, 2008.)(1) Revisions ha
32、ve been made to Sections 2.3 and 6.4 to addanalytical spectrochemical methods ISO 3815-1 andISO 3815-2.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 d
33、etermination of the validity of any such 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
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35、that your comments have not received 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 this 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).B952083
