1、Designation:B79312B79313 Standard Specication for Zinc Casting Alloy Ingot for Sheet Metal Forming Dies and Plastic Injection Molds 1 This standard is issued under the xed designation B793; the number immediately following the designation indicates the year of original adoption or, in the case of re
2、vision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval. 1. Scope* 1.1 This specication covers commercial zinc alloys in ingot form for remelting for the manufacture of
3、 dies and molds from the alloys as shown in Table 1. 1.2 This specication presents requirements for zinc alloys suitable for the production of sand cast or plaster cast forming dies for sheet metal stamping operations and plastic injection molding.AlloyAis intended for use in the fabrication of dies
4、 for sheet metal stamping under drop hammer and hydraulic pressure.Alloy B is a special purpose alloy of closely controlled composition and is primarily used in the manufacture of plastic injection molds. 1.3 This specication covers two zinc alloys which are specied and designated as follows: UNS AS
5、TM Traditional Z35543 Alloy A Kirksite A Z35542 Alloy B Kirksite B UNS ASTM Traditional Z35543 Alloy A Kirksite A Z35542 Alloy B Kirksite B 1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are prov
6、ided for information only and are not considered standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identied in the appropriate
7、Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use. 2. Referenced Documents 2.1 The following documents of the issue in effect on dat
8、e of order acceptance form a part of this specication to the extent referenced herein: 2.2 ASTM Standards: 2 B897Specication for Conguration of Zinc and Zinc Alloy Jumbo Block and Half Block Ingot B899Terminology Relating to Non-ferrous Metals and Alloys B908Practice for the Use of Color Codes for Z
9、inc Casting Alloy Ingot B949Specication for General Requirements for Zinc and Zinc Alloy Products E29Practice for Using Signicant Digits in Test Data to Determine Conformance with Specications E88Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Compositio
10、n E527Practice for Numbering Metals and Alloys in the Unied Numbering System (UNS) E536Test Methods for Chemical Analysis of Zinc and Zinc Alloys 1 This specication is under the jurisdiction ofASTM Committee B02 on Nonferrous Metals andAlloys and is the direct responsibility of Subcommittee B02.04 o
11、n Zinc and Cadmium. Current edition approved May 1, 2012Feb. 1, 2013. Published July 2012March 2013. Originally approved in 1988. Last previous edition approved in 20102012 as B79310.B79312. DOI: 10.1520/B0793-12.10.1520/B0793-13. 2 ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orconta
12、ctASTMCustomerServiceatserviceastm.org.For Annual Book ofASTM Standards volume information, refer to the standards Document Summary page on the ASTM website. This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made
13、to the previous version. Because it 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 version of the standard as published by ASTM is to be considered the official document. *AS
14、ummary 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 12.3 ISO Standards: 3 ISO3815-1Zinc and zinc alloysPart 1: Analysis of solid samples by optical emission spectrometry ISO381
15、5-2Zinc and zinc alloysPart 2: Analysis by inductively coupled plasma optical emission spectrometry 3. Terminology 3.1 Terms shall be dened in accordance with Terminology B899. 4. Ordering Information 4.1 Orders for zinc alloy ingot under this specication shall include information as specied in Spec
16、ication B949, Section 4. 5. Materials and Manufacture 5.1 The alloys may be made by any approved process. 5.2 The material covered by this specication shall be of uniform quality and shall be free from dross, slag, or other harmful contamination. 5.3 Jumboorblockingotsshallconformtocongurationshowni
17、nSpecicationB897,ortoashapeandsizepreviouslyagreed upon. 6. Chemical Requirements 6.1 LimitsThe alloy shall conform to the requirements as to chemical composition prescribed in Table 1. 6.2 Chemical requirement procedures shall be in compliance with the provisions of Specication B949, Section 5.2. 3
18、 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org. TABLE 1 Chemical and North American Color Code Requirements A,B Composition, % UNS Z35543 Alloy A Kirksite A UNS Z35542 Alloy B Kirksite B Color Code C Green/Red Green/Bla
19、ck Element Aluminum 3.54.5 3.94.3 Cadmium 0.005 max 0.003 max Copper 2.53.5 2.52.9 Iron 0.100 max 0.075 max Lead 0.007 max 0.003 max Magnesium 0.020.10 0.020.05 Tin 0.005 max 0.001 max Zinc Remainder Remainder TABLE 1 Chemical and North American Color Code Requirements A,B Composition, % UNS Z35543
20、Alloy A Kirksite A UNS Z35542 Alloy B Kirksite B Color Code C Green/Red Green/Black Element Aluminum 3.54.5 3.94.3 Cadmium 0.005 max 0.003 max Copper 2.53.5 2.52.9 Iron 0.100 max 0.075 max Lead 0.007 max 0.003 max Magnesium 0.020.10 0.020.05 Tin 0.005 max 0.001 max Zinc Remainder Remainder A The fol
21、lowing applies to all specied limits in this table: For purposes of determining conformance with this specication, the observed value or calculated value obtained from analysis shall be rounded off to the nearest unit in the last right hand place of gures used in expressing the specied limit, in acc
22、ordance with the rounding method of Practice E29. B UNS designations were established in accordance with Practice E527. C Refer to Practice B908. (Note: Colors indicated are for North American applications.) B79313 27. Sampling for ChemicalAnalysis 7.1 Sampling procedures shall be in compliance with
23、 the provisions of Specication B949, Section 6. 8. Method of ChemicalAnalysis 8.1 The determination of chemical composition shall be made in accordance with Test Methods E536, or ISO3815-1, or ISO3815-2 or other methods. In case of dispute, the results secured by Test Methods E536, or ISO3815-1, or
24、ISO3815-2 shall be the basis of acceptance. NOTE 1Test Methods E536 is not directly applicable to the alloys in Specication B793. ISO3815-1 and ISO3815-2 are generic methods applied to zinc and zinc alloys. Each of the methods may be modied and formatted for the alloy to be assayed.An experienced ch
25、emist, using suitable and/or traceablestandardsalongwithvalidqualityassurancetechniques,willbeabletoperformandvalidatethemethodsanddemonstrateacceptableprecision and accuracy. 9. Source Inspection 9.1 Source inspection shall be in compliance with the provisions of Specication B949, Section 7. 10. Re
26、jection and Rehearing 10.1 Claims to be considered in accordance with the provisions of Specication B949, Section 8. 11. Investigation of Claims 11.1 Claims shall be investigated in accordance with the provisions of Specication B949, Section 8. 12. Settlement of Claims 12.1 Claims shall be settled i
27、n accordance with the provisions of Specication B949, Section 8. 13. Product Identication Marking and Packaging 13.1 Eachslab,block,jumbooringotshallbemarkedforidenticationinaccordancewiththeprovisionsofSpecicationB949, Section 10. 14. Keywords 14.1 blankingdies;casting;castingalloys;formingdies;gra
28、vitycasting;Kirksite;KirksiteA;KirksiteB;sheetmetaldies;zinc SUMMARY OF CHANGES CommitteeB02hasidentiedthelocationofselectedchangestothisstandardsincethelastissue(B79312) that may impact the use of this standard. (Approved February 1, 2013.) (1)A section on Source Inspection was reinstated after it
29、had been incorrectly removed. SUMMARY OF CHANGES Committee B02 has identied the location of selected changes to this standard since the last issue (B793-10B79310) that may impact the use of this standard. (Approved May 1, 2012.) (1)Revisions have been made to Sections 4, 6, 7, 8, 9, and 10 to refere
30、nce Specication B949 and delete certain portions of these sections formerly a part of this standard. (2)The titles of Sections 7, 9, and 10 have been revised to be in agreement with a standard format for Subcommittee B02.04 standards. B79313 3ASTM International takes no position respecting the valid
31、ity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. Thisstandardissubje
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