1、Designation: B894 10Standard 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 of last revision. A
2、 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 ACuZinc5, zinc-copper-aluminum alloy die castings. (UNS Z46541).31.2 The values stated in SI units are to b
3、e 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 including those identifi
4、ed 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 documents of the issue
5、in effect on dateof order acceptable form a part of this specification to theextent referenced herein:2.2 ASTM Standards:4B892 Specification for ACuZinc5 (Zinc-Copper-Aluminum) Alloy in Ingot Form for Die CastingsB899 Terminology Relating to Non-ferrous Metals andAlloysB949 Specification for General
6、 Requirements for Zinc andZinc Alloy ProductsE10 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
7、 for Chemical Analysis of Zinc and ZincAlloys2.3 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
8、 coupled plasma optical emission spectrometry2.5 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 D
9、efinitions of Terms Specific to This Standard: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
10、for die castings shall include the following 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 a
11、llow-ances for machining, if any. Location of ejector pin marks orparting lines shall be at the option of the 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 basis1ACuZinc and
12、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 approved April 1, 2010. Published April 2
13、010. Originallyapproved in 1999. Last previous edition approved in 2009 as B894 - 09. DOI:10.1520/B0894-10.3See Footnote B in Table 1.4For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume info
14、rmation, 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 National Standards Institute (ANSI), 25
15、 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 Association 241 Holbrook DrWheeling, Ill
16、inois 60090-5809, http:/www.diecasting.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 19428-2959, United States.of need. These shall be specified in the contract or purchaseorder, as addit
17、ional procedures and extended delivery time 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
18、 11),4.2.6 Certification (Section 13),4.2.7 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 Speci
19、fication B892.5.2 The material covered by this 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
20、 inspection and test require-ments specified 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
21、purchaser shall have the right to performany 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 shal
22、lconsist of the production from each die during 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 t
23、he requirements of the contract,purchase order, 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 Wh
24、en specified in the contact, purchase order, 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 pro
25、ducer by analyzing samplestaken at the time 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, i
26、s shall be called for in the contract or purchaseorder.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
27、 shall be taken to representthe following:7.2.1 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, Secti
28、on 6.5 and 6.6.7.4 Method of AnalysisThe determination 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,orISO 3815-2 shall be the basis of accep-tance.NOTE 1Test Methods E536 is not
29、directly applicable to ACuZinc5.ISO 3815-1and 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, w
30、ill be able toperform and validate the methods 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 mechanic
31、al prop-erties determined by tension or impact tests.8.1.1 Tensile strength, yield strength and elongation valuesshown in Table 1. They are Weibull analysis values to be usedfor design guidance. They are B50and B1values with 50 %confidence and were obtained from tests on 5.3 mm diameterseparately ca
32、st test bars which had a 25.4 mm gage length. Thebars were tested in the as-cast condition.TABLE 1 ACuZinc5 Chemical Requirements, Composition, Zinc-Copper-Aluminum Die CastingsAElementsComposition, %(Z46541)BCopper 5.0 to 6.0Aluminum 2.5 to 3.3Magnesium 0.025 - 0.05Iron 0.075 maxLead 0.005 maxCadmi
33、um 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 unit in the lastright-hand place of f
34、igures 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 102NOTE 2The property values of test bars cut from castings will varydepending on the
35、 solidification rate of the individual 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,
36、acceptance or rejection of the casting 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 specifi
37、ed on thepart drawing. A Brinell hardness 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 Permi
38、ssible variations in dimensions shall 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 wa
39、ived by the pur-chaser shall be confirmed 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 im
40、perfections shall not exceed thosespecified 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
41、 with the requirements and standardsagreed upon.10.3 WorkmanshipDie castings shall be of uniform qual-ity, free of injurious discontinuities that will adversely affecttheir serviceability.10.4 FinishWhen specified in the contract or purchaseorder the as-cast surface finish required shall conform tos
42、tandards agreed upon between the purchaser 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
43、the purchaser andthe producer or supplier, 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
44、 ap-proved sampling plan fail to meet the 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 remov
45、ed the nonconforming mate-rial or the producer 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-men
46、t of the rejected castings to the purchaser. 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
47、9.14. Identification Marking14.1 When specified 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,
48、 the die cast-ings shall be packaged to 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 di
49、scretion, pro-vided they are such as to 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 a
