1、Designation:B79310 Designation: B793 12Standard 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 t
2、he case of revision, 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 in ingot form for remelting for the
3、 manufacture of dies and molds fromthe alloys as shown in Table 1.1.2 This specification presents requirements for zinc alloys suitable for the production of sand cast or plaster cast forming diesfor sheet metal stamping operations and plastic injection molding. Alloy A is intended for use in the fa
4、brication of dies for sheetmetal stamping under drop hammer and hydraulic pressure. Alloy B is a special purpose alloy of closely controlled compositionand is primarily used in the manufacture of plastic injection molds.1.3 This specification covers two zinc alloys which are specified and designated
5、 as follows:UNS ASTM TraditionalZ35543 Alloy A Kirksite AZ35542 Alloy B Kirksite B1.4 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
6、.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 identified in the appropriate Material Safety DataSheet (MSDS) for this product/material
7、as provided by the manufacturer, to establish appropriate safety and health practices, anddetermine the applicability of regulatory limitations prior to use.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
8、extentreferenced herein:2.2 ASTM Standards:2B897 Specification for Configuration of Zinc and Zinc Alloy Jumbo Block and Half Block IngotB899 Terminology Relating to Non-ferrous Metals and AlloysB908 Practice for the Use of Color Codes for Zinc Casting Alloy IngotB949 Specification for General Requir
9、ements for Zinc and Zinc Alloy ProductsE29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications E88E88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical CompositionE527 Practice for Numbering Metals and Alloys in
10、the Unified Numbering System (UNS)E536 Test Methods for Chemical Analysis of Zinc and Zinc Alloys2.3 ISO Standards:3ISO 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 e
11、mission spectrometry3. Terminology3.1 Terms shall be defined in accordance with Terminology B899.1This 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 Oct
12、.May 1, 2010.2012. Published October 2010.July 2012. Originally approved in 1988. Last previous edition approved in 20092010 asB793 109. DOI: 10.1520/B0793-102.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book o
13、f ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.1This document is not an ASTM standard and is intended only to provide
14、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 users consult prior editions as appropriate. In all cases only the current versionof the stan
15、dard as published by ASTM is to be considered the official document.*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 19428-2959, United States.4. Ordering Information4.1Orders for ingots under th
16、is specification shall include the following information:4.1.1Quantity in pounds,4.1.2Alloy (Table 1),4.1.3Size, if not manufacturers standard,4.1.4Specification number and date,4.1.5Source inspection (Section 7), and4.1.6Marking (Section 9).4.1 Orders for zinc alloy ingot under this specification s
17、hall include information as specified in Specification B949, Section 4.5. Materials and Manufacture5.1 The alloys may be made by any approved process.5.2 The material covered by this specification shall be of uniform quality and shall be free from dross, slag, or other harmfulcontamination.5.3 Jumbo
18、 or block ingots shall conform to configuration shown in Specification B897, or to a shape and size previously agreedupon.5.4Material produced under this specification shall conform with the General Requirements of Specification B949, unlessotherwise noted in this specification.6. Chemical Requireme
19、nts6.1 LimitsThe alloy shall conform to the requirements as to chemical composition prescribed in Table 1. Conformance shallbe determined by the producer by analyzing samples taken at the time the ingots are made. If the producer has determined thechemical composition of the metal during the course
20、of manufacture, he shall not be required to sample and analyze the finishedproduct.6.2In case of dispute, the following requirements shall apply:6.2.1Number of SamplesSamples for verification of chemical composition shall be taken as follows:6.2.2If the ingots are shipped in carload lots of the same
21、 alloy, not less than five ingots shall be taken at random from the carloadfor sampling. If the shipment is less than a carload lot, one sample ingot shall be taken for each 10000 lb (4500 kg) or fractionthereof. When it is deemed necessary, a sample may be taken from each melt of 1000 lb (450 kg) o
22、r more.6.3Methods of SamplingSamples from ingots for determination of chemical composition shall be taken in accordance with oneof the following methods:6.3.1Samples for chemical analysis shall be taken from the material by drilling, sawing, milling, turning, or clipping arepresentative piece or pie
23、ces to obtain weight of prepared sample not less than 100 g. Sampling shall be in accordance withPractice E88.6.3.2By agreement, an optional method of sampling for analysis may be by melting together representative portions of each ingotselected, and then sampling the liquid composite by casting sui
24、table specimens for either spectrographic or chemical analysis.6.4Method of AnalysisThe determination of chemical composition shall be made in accordance with Test MethodsTABLE 1 Chemical and North American Color CodeRequirementsA,BComposition, %UNS Z35543Alloy AKirksite AUNS Z35542Alloy BKirksite B
25、Color 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 maxZinc Remainder RemainderAThe following applies to all specified limits in this table: For purp
26、oses 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 used in expressing the specified limit, in accordancewith the rounding method of Practice E29.BUNS de
27、signations were established in accordance with Practice E527.CRefer to Practice B908. (Note: Colors indicated are for North Americanapplications.)B793 1226.2 Chemical requirement procedures shall be in compliance with the provisions of Specification B949, Section 5.2.7. Sampling for Chemical Analysi
28、s7.1 Sampling procedures shall be in compliance with the provisions of Specification B949, Section 6.8. Method of Chemical Analysis8.1 The determination of chemical composition shall be made in accordance with Test Methods E536, or ISO 3815-1, orISO 3815-2 or other methods. In case of dispute, the r
29、esults secured by Test Methods E536, or ISO 3815-1, or ISO 3815-2 shallbe the basis of acceptance.NOTE 1Test Methods E536 is not directly applicable to the alloys in Specification B793. ISO 3815-1 and ISO 3815-2 are generic methods appliedto zinc and zinc alloys. Each of the methods may be modified
30、and formatted for the alloy to be assayed. An experienced chemist, using suitable and/ortraceable standards along with valid quality assurance techniques, will be able to perform and validate the methods and demonstrate acceptable precisionand accuracy.7.Source Inspection7.1If the purchaser desires
31、that his representative inspect or witness the inspection and testing of the product prior to shipment,such agreement shall be made by the purchaser and producer or supplier as part of the contract or purchase order.7.2When such inspection or witness of inspection and testing is agreed upon, the pro
32、ducer or supplier shall afford the purchasersrepresentative all reasonable facilities to satisfy him that the product meets the requirements of this specification. Inspection andtests shall be conducted so there is no unnecessary interference with the producers operations.8.9. Rejection and Rehearin
33、g8.1Material that fails to conform to the requirements of this specification may be rejected. Rejection should be reported to theproducer or supplier promptly and in writing. In case of dissatisfaction with the results of the test, the producer or supplier maymake claim for a rehearing. If the rehea
34、ring establishes that the material does not conform to the requirements of this specification,as much of the rejected original material as possible shall be returned to the producer or supplier.9.Identification Marking9.1All ingots shall be properly marked for identification with the producers name
35、or brand.9.2Each bundle or skid shall be identified with the producers heat, lot, or other identification mark.9.3Each ingot, bundle or skid shall be marked with the appropriate Color Code for the alloy as per NorthAmerican requirementsin Practice B908.9.1 Claims to be considered in accordance with
36、the provisions of Specification B949, Section 8.10. Preparation for Delivery10.1PackagingUnless otherwise specified, the ingot shall be packaged to provide adequate protection during normal handlingand transportation. Each package shall contain only one alloy unless otherwise agreed upon. Investigat
37、ion of Claims10.1 Claims shall be investigated in accordance with the provisions of Specification B949, Section 8.11. Settlement of Claims11.1 Claims shall be settled in accordance with the provisions of Specification B949, Section 8.12. Product Identification Marking and Packaging12.1 Each slab, bl
38、ock, jumbo or ingot shall be marked for identification in accordance with the provisions of Specification B949,Section 10.13. Keywords113.1 blanking dies; casting; casting alloys; forming dies; gravity casting; Kirksite; KirksiteA; Kirksite B; sheet metal dies; zincSUMMARY OF CHANGESCommittee B02 ha
39、s identified the location of selected changes to this standard since the last issue (B793 - 109)that may impact the use of this standard. (Approved OctoberMay 1, 2010.) 2012.)(1)Note 1 was added to clarify the use of analytical methods ASTM E536, ISO3815-1 and ISO3815-2.Committee B02 has identified
40、the location of selected changes to this standard since the last issue (B793-08)that may impact the use of this standard. (Approved October 1, 2009.) ) Revisions have been made to Sections4, 6, 7, 8, 9, and 10 to reference Specification B949 and delete certain portions of these sections formerly a p
41、artof this standard.B793 123(1)The reference to Test Methods E47 as a method to analyze for tin only has been removed.(2)References to ISO3815-1 and ISO3815-2 were added. ) The titles of Sections 7, 9, and 10 have been revised to be in agreementwith a standard format for Subcommittee B02.04 standard
42、s.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 such patent rights, and the riskof infringement of such rights, a
43、re 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 invited either for revision of this standard or for additional stand
44、ardsand 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 a fair hearing you shouldmake your views known to the ASTM Commi
45、ttee 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).B793 124
