1、Designation: B894 10 (Reapproved 2015)Standard Specification forACuZinc51(Zinc-Copper-Aluminum) Alloy Die Castings2This standard is issued under the fixed designation B894; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year o
2、f 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 ACuZinc5, zinc-copper-aluminum alloy die castings. (UNS Z46541).31.2 The values stated in
3、SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 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 includi
4、ng 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 docume
5、nts of the issue in effect on dateof order acceptable form a part of this specification to theextent referenced herein:2.2 ASTM Standards:4B892 Specification for ACuZinc5B899 Terminology Relating to Non-ferrous Metals and Al-loysB949 Specification for General Requirements for Zinc andZinc Alloy Prod
6、uctsE10 Test Method for Brinell Hardness of Metallic MaterialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)E536 Test Methods for Chemical Analysis of Zinc and ZincAl
7、loys2.3 Federal Standards:5Fed. Std. No. 123 Marking for Shipment (Civil Agencies)2.4 ISO Standards:6ISO 3815-1 Zinc and zinc alloys Part 1: Analysis of solidsamples by optical emission spectrometryISO 3815-2 Zinc and zinc alloys Part 2: Analysis byinductively coupled plasma optical emission spectro
8、metry2.5 Military Standard:7MIL-P-116 Methods of PreservationMIL-STD-129 Marking for Shipment and Storage2.6 NADCA Standard:8NADCA Product Specification Standards for Die Castings3. Terminology3.1 Terms shall be defined in accordance with TerminologyB899.3.2 Definitions of Terms Specific to This Sta
9、ndard: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 produced by such a process.Alternately known as pressure die casting.4. Ordering Information4.1 Orders for die castings shall include the follo
10、wing basicinformation in addition to the information specified in Speci-fication B949, Section 4:4.1.1 Part name and number,4.1.2 Alloy (Table 1), and4.1.3 Drawing of die casting, when required, giving allnecessary dimensions and showing latest revisions and allow-ances for machining, if any. Locati
11、on of ejector pin marks or1ACuZinc and ACuZinc5 are registered trade names of the General MotorsCorporation.2This 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 ap
12、proved May 1, 2015. Published May 2015. Originallyapproved in 1999. Last previous edition approved in 2010 as B894 101. DOI:10.1520/B0894-10R15.3See Footnote B in Table 1.4For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Ann
13、ual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.5Available from U.S. Government Printing Office Superintendent of Documents,732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http:/www.access.gpo.gov.6Available from American Na
14、tional Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.7Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodssp.daps.mil.8Available from North American Die Casting Ass
15、ociation 241 Holbrook DrWheeling, Illinois 60090-5809, http:/www.diecasting.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1parting lines shall be at the option of t
16、he producer, unlessspecifically designated on the drawing.4.2 Additional tests, options and special inspection require-ments as provided below should be justified only on the basisof need. These shall be specified in the contract or purchaseorder, as additional procedures and extended delivery time
17、maybe involved.4.2.1 Chemical analysis (7.1.1),4.2.2 Quality assurance (Section 6),4.2.3 Special proof tests or mechanical properties (Section8),4.2.4 General quality options for internal soundness or forfinish (Section 10),4.2.5 Source inspection (Section 11),4.2.6 Certification (Section 13),4.2.7
18、Marking for identification (Section 14), and4.2.8 Special packaging (Section 15).5. Materials and Manufacture5.1 The metal used in the manufacture of die castings shallbe zinc alloy of a specified chemical composition conformingto the requirements of Specification B892.5.2 The material covered by th
19、is specification shall be ofuniform quality and shall be free of harmful contamination.6. Quality Assurance6.1 Responsibility for InspectionWhen specified in thecontract or purchase order, the producer or supplier is respon-sible for the performance of all inspection and test require-ments specified
20、 herein. Except as otherwise specified in thecontract or order, the producer or supplier may use his own orany other suitable facilities for the performance of the inspec-tion and test requirements specified herein, unless disapprovedby the purchaser. The purchaser shall have the right to performany
21、 of the inspections and tests set forth in this specification.Quality assurance standards shall be agreed upon between theproducer or supplier and purchaser at the time a contract ororder is placed.6.2 For normal inspection purposes, an inspection lot shallconsist of the production from each die dur
22、ing a singleproduction run, as defined and recorded by the producer, andshipped, or available for shipment, at one time.6.2.1 The producer or supplier shall examine each diecasting of a randomly or statistically selected sample todetermine conformance to the requirements of the contract,purchase ord
23、er, or part drawing. The results of this inspectionshall be recorded.6.2.1.1 Unless otherwise specified in the contract, purchaseorder, or part drawing, detailed dimensional conformance shallnormally be determined on one or more production samples.6.2.2 When specified in the contact, purchase order,
24、 or partdrawing, special inspection lot definitions may be established,for a specific part.7. Chemical Requirements7.1 LimitsThe die casting shall conform to the require-ments as to chemical composition in Table 1. Conformanceshall be determined by the producer by analyzing samplestaken at the time
25、castings 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.7.1.1 When a detailed chemical analysis is required with ashipment, is shall be called for in the contract or pur
26、chaseorder.7.1.2 If the producers or suppliers method of compositioncontrol is acceptable, sampling for chemical analysis may bewaived at the discretion of the purchaser.7.2 Number of SamplesWhen required, samples for deter-mination of chemical composition shall be taken to representthe following:7.
27、2.1 A sample shall be taken from each of two representa-tive castings selected from each lot defined in 6.2.7.3 Methods of SamplingSamples from die castings fordetermination of chemical composition shall be taken inaccordance with Specification B949, Section 6.5 and 6.6.7.4 Method of AnalysisThe det
28、ermination of chemicalcomposition shall be made in accordance with SpecificationB949, Section 5.2.2.7.4.1 In case of dispute, the results secured by Test MethodsE536, ISO 3815-1, or ISO 3815-2 shall be the basis ofacceptance.NOTE 1Test Methods E536 is not directly applicable to ACuZinc5.ISO 3815-1an
29、d ISO 3815-2 are generic methods applied to zinc and zincalloys. Each of the methods may be modified and formatted for the alloyto be assayed. An experienced chemist, using suitable and/or traceablestandards along with valid quality assurance techniques, will be able toperform and validate the metho
30、ds and demonstrate acceptable precisionand accuracy.8. Mechanical Properties and Tests8.1 Unless specified in the contract or purchase order, orspecified on the detail drawing, acceptance of die castingsunder this specification shall not depend on mechanical prop-erties determined by tension or impa
31、ct tests.8.1.1 Tensile strength, yield strength and elongation valuesshown in Table 1. They are Weibull analysis values to be usedTABLE 1 ACuZinc5 Chemical Requirements, Composition, Zinc-Copper-Aluminum Die CastingsAElementsComposition,%(Z46541)BCopper 5.0 to 6.0Aluminum 2.5 to 3.3Magnesium 0.025 -
32、 0.05Iron 0.075 maxLead 0.005 maxCadmium 0.004 maxTin 0.003 maxZinc RemainderCAThe 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
33、 unit in the lastright-hand place of figures used in expressing the specified limit, in accordancewith the rounding method of Practice E29.BUNS designations were established in accordance with Practice E527.CDetermined arithmetically by difference.B894 10 (2015)2for design guidance. They are B50and
34、B1values with 50 %confidence and were obtained from tests on 5.3 mm diameterseparately cast test bars which had a 25.4 mm gage length. Thebars were tested in the as-cast condition.NOTE 2The property values of test bars cut from castings will varydepending on the solidification rate of the individual
35、 casting. Solidifica-tion and cooling rate are significantly influenced by casting section size.Also due to cooling rate and section size variation, the properties of barsmachined from castings may vary from those of separately cast test bars.For these reasons, acceptance or rejection of the casting
36、 shall be based onchemistry. Hardness and mechanical properties may be used when agreedby the purchaser and supplier, and specified on the engineering drawing.8.1.2 Hardness (Test Method E10)The hardness shall bedetermined on the casting unless otherwise specified on thepart drawing. A Brinell hardn
37、ess test will be performed using a500 kg load and a 10 mm ball unless otherwise specified andagreed to by supplier and user. If the part is too small for aBrinell test, a Rockwell F or K hardness test is suggested.9. Permissible Variations in Dimensions9.1 Permissible variations in dimensions shall
38、be within thelimits specified on the drawings or in the contract or purchaseorder.9.1.1 Any dimensions for which a tolerance is not specifiedshall be in accordance with NADCA Product SpecificationStandards for Die Castings.9.2 Dimensional tolerance deviations waived by the pur-chaser shall be confir
39、med in writing to the producer or supplier.10. General Quality10.1 Internal SoundnessWhen specified, the soundness ofdie castings shall conform to standards or requirements agreedupon between the producer or supplier and the purchaser. Thenumber and extend of imperfections shall not exceed thosespec
40、ified by the purchaser. The standards or requirements mayconsist of radiographs, photographs, or sectioned die castings.10.2 Imperfections inherent in die castings shall not because for rejection provided it is demonstrated that the diecastings are in accordance with the requirements and standardsag
41、reed upon.10.3 WorkmanshipDie castings shall be of uniformquality, free of injurious discontinuities that will adverselyaffect their serviceability.10.4 FinishWhen specified in the contract or purchaseorder the as-cast surface finish required shall conform tostandards agreed upon between the purchas
42、er and the producer,supplier, or as prescribed in NADCA Product SpecificationStandards for Die Castings.10.5 Pressure TightnessWhen specified in the contract orpurchase order the pressure tightness of die castings shallconform to standards agreed upon between the purchaser andthe producer or supplie
43、r, or as prescribed in NADCA ProductSpecification Standards for Die Castings.11. Source Inspection11.1 Source inspection provisions shall be in accordancewith Specification B949, Section 7.12. Rejection and Retest12.1 When one or more samples, depending on the ap-proved sampling plan fail to meet th
44、e requirements of thisspecification, the represented lot is subject to rejection exceptas otherwise provided in 12.2.12.2 Lots rejected for failure to meet the requirements ofthis specification may be resubmitted for test provided:12.2.1 The producer has removed the nonconforming mate-rial or the pr
45、oducer has reworked the rejected lot as necessaryto correct the deficiencies.12.3 Individual castings that show injurious imperfectionsduring subsequent manufacturing operations may be rejected.The producer or supplier shall be responsible only for replace-ment of the rejected castings to the purcha
46、ser. As much of therejected original material as possible shall be returned to theproducer or supplier.13. Certification13.1 When specified in the purchase order or contract,certification of the product shall be in accordance with Speci-fication B949, Section 9.14. Identification Marking14.1 When sp
47、ecified in the contract or purchase order, or inthe detail drawing, all castings shall be properly marked foridentification with the part number and name or brand of theproducer as specified.15. Preparation for Delivery15.1 PackagingUnless otherwise specified, the die cast-ings shall be packaged to
48、provide adequate protection duringnormal handling and transportation. Each Package shall con-tain only one type of item unless otherwise agreed upon. Thetype of packaging and gross weight of containers shall, unlessotherwise agreed upon, be at the producers discretion, pro-vided they are such as to
49、ensure acceptance by common orother carriers for safe transportation at the lowest rate to thedelivery point.15.2 MarkingEach shipping container shall be legiblymarked with the purchase order number, gross and net weights,and the suppliers name or trademark. Marking for shipmentshall be in accordance with Fed. Std. No. 123 for civil agenciesand MIL-STD-129 for Military agencies.15.3 PreservationMaterial intended for prolonged storagein unheated locations shall be adequately packed and protectedto avoid deterioration and damage. When specified in thecontr
