1、Designation: B793 10Standard Specification forZinc Casting Alloy Ingot for Sheet Metal Forming Dies andPlastic Injection Molds1This standard is issued under the fixed designation B793; 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. Scope*1.1 This specification covers commercial zinc alloys iningot form for remelting for the manufacture of dies
3、 and moldsfrom the alloys as shown in Table 1.1.2 This specification presents requirements for zinc alloyssuitable for the production of sand cast or plaster cast formingdies for sheet metal stamping operations and plastic injectionmolding. Alloy A is intended for use in the fabrication of diesfor s
4、heet metal stamping under drop hammer and hydraulicpressure. Alloy B is a special purpose alloy of closely con-trolled composition and is primarily used in the manufacture ofplastic injection molds.1.3 This specification covers two zinc alloys which arespecified and designated as follows:UNS ASTM Tr
5、aditionalZ35543 Alloy A Kirksite AZ35542 Alloy B Kirksite B1.4 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 This standard does not
6、 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 including those identified in the appropriateMaterial Safety Data Sheet (MSDS) for this product/materialas provided by the manufactu
7、rer, to establish 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 AS
8、TM Standards:2B897 Specification for Configuration of Zinc and ZincAlloy Jumbo Block and Half Block IngotB899 Terminology Relating to Non-ferrous Metals andAlloysB908 Practice for the Use of Color Codes for Zinc CastingAlloy IngotB949 Specification for General Requirements for Zinc andZinc Alloy Pro
9、ductsE29 Practice for Using Significant Digits in Test Data toDetermine 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)1This s
10、pecification 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 Oct. 1, 2010. Published October 2010. Originallyapproved in 1988. Last previous edition approved in 2009 as
11、B793 09. DOI:10.1520/B0793-10.2For 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.TABLE 1 Chemical and North Amer
12、ican Color CodeRequirementsA,BComposition, %UNS Z35543Alloy AKirksite AUNS Z35542Alloy BKirksite BColor CodeCGreen/Red Green/BlackElementAluminum 3.54.5 3.94.3Cadmium 0.005 max 0.003 maxCopper 2.53.5 2.52.9Iron 0.100 max 0.075 maxLead 0.007 max 0.003 maxMagnesium 0.020.10 0.020.05Tin 0.005 max 0.001
13、 maxZinc Remainder RemainderAThe following applies to all specified limits in this table: For purposes ofdetermining conformance with this specification, the observed value or calculatedvalue obtained from analysis shall be rounded off “to the nearest unit” in the lastright hand place of figures use
14、d in expressing the specified limit, in accordancewith the rounding method of Practice E29.BUNS designations were established in accordance with Practice E527.CRefer to Practice B908. (Note: Colors indicated are for North Americanapplications.)1*A Summary of Changes section appears at the end of thi
15、s standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.E536 Test Methods for Chemical Analysis of Zinc and ZincAlloys2.3 ISO Standards:3ISO 3815-1 Zinc and zinc alloysPart 1: Analysis of solidsamples by optical emission spectromet
16、ryISO 3815-2 Zinc and zinc alloysPart 2: Analysis byinductively coupled plasma optical emission spectrometry3. Terminology3.1 Terms shall be defined in accordance with TerminologyB899.4. Ordering Information4.1 Orders for ingots under this specification shall includethe following information:4.1.1 Q
17、uantity in pounds,4.1.2 Alloy (Table 1),4.1.3 Size, if not 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 spec
18、ification shall be ofuniform quality and shall be free from dross, slag, or otherharmful contamination.5.3 Jumbo or block ingots shall conform to configurationshown in Specification B897, or to a shape and size previouslyagreed upon.5.4 Material produced under this specification shall conformwith th
19、e General Requirements of Specification B949, unlessotherwise noted in this specification.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 tim
20、e the ingots are made. If the producer hasdetermined the chemical composition of the metal during thecourse of manufacture, he 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
21、 ofchemical composition shall be taken as follows:6.2.2 If the ingots are shipped in carload lots of the samealloy, not less than five ingots shall be taken at random fromthe carload for sampling. If the shipment is less than a carloadlot, one sample ingot shall be taken for each 10 000 lb (4 500kg)
22、 or fraction thereof. When it is deemed necessary, a samplemay be taken from each melt of 1 000 lb (450 kg) 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
23、shall be taken from thematerial by drilling, sawing, milling, turning, or clipping 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
24、 together representative portions ofeach ingot selected, and then sampling the 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 Test MethodsE536,orISO 3815-1,o
25、rISO 3815-2 or other methods. In caseof dispute, the results secured by Test Methods E536,orISO 3815-1,orISO 3815-2 shall be the basis of acceptance.NOTE 1Test Methods E536 is not directly applicable to the alloys inSpecification B793. ISO 3815-1 and ISO 3815-2 are generic methodsapplied to zinc and
26、 zinc alloys. Each of the methods may be modified andformatted for the alloy to be assayed. An experienced chemist, usingsuitable and/or traceable standards along with valid quality assurancetechniques, will be able to perform and validate the methods anddemonstrate acceptable precision and accuracy
27、.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 andproducer or supplier as part of the contract or purchase order.7.2 When such inspection or witness
28、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 specifica-tion. Inspection and tests shall be conducted so there is nounnecessary interference with the
29、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 promptly and in writing. In case ofdissatisfaction with the results of the test, the producer orsupplier
30、 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 be returned to the producer orsupplier.9. Identification Marking9.1 All ingots shall be properly mark
31、ed 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 marked with theappropriate Color Code for the alloy as per North Americanrequirements in Practice B908
32、.10. Preparation for Delivery10.1 PackagingUnless otherwise specified, the ingot shallbe packaged to provide adequate protection during normalhandling and transportation. Each package shall contain onlyone alloy unless otherwise agreed upon.3Available from American National Standards Institute (ANSI
33、), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.B793 10211. Keywords11.1 blanking dies; casting; casting alloys; forming dies;gravity casting; Kirksite; Kirksite A; Kirksite B; sheet metaldies; zincSUMMARY OF CHANGESCommittee B02 has identified the location of selected changes to
34、 this standard since the last issue (B793 - 09)that may impact the use of this standard. (Approved October 1, 2010.)(1) Note 1 was added to clarify the use of analytical methodsASTM E536, ISO 3815-1 and ISO 3815-2.Committee B02 has identified the location of selected changes to this standard since t
35、he last issue (B793 - 08)that may impact the use of this standard. (Approved October 1, 2009.)(1) The reference to Test Methods E47 as a method to analyzefor tin only has been removed.(2) References to ISO 3815-1 and ISO 3815-2 were added.ASTM International takes no position respecting the validity
36、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 such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject t
37、o 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 invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.
38、 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 a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is
39、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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).B793 103
