1、Designation: B894 17Standard 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 appropriateSafety Data Sheet (SDS) for this product/material as providedby the manufacturer, to establish appropriate safety, health andenvironmental practices, and determine the applicability ofregulatory limitations prior to use.1.4 This international standard was developed in accor-danc
5、e with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 The follo
6、wing documents 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 ACuZinc5 (Zinc-Copper-Aluminum)Alloy in Ingot Form for Die CastingsB899 Terminology Relating to Non-ferrous Metals and Al-loysB
7、949 Specification for General 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
8、System (UNS)E536 Test Methods 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
9、Part 2: Analysis byinductively 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 accorda
10、nce with TerminologyB899.3.2 Definitions 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. O
11、rdering Information4.1 Orders for die castings shall include the following basicinformation in addition to the information specified in Speci-fication B949:1ACuZinc and ACuZinc5 are registered trade names of the General MotorsCorporation.2This specification is under the jurisdiction of ASTM Committe
12、e B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.04 on Zinc and Cadmium.Current edition approved June 1, 2017. Published September 2017. Originallyapproved in 1999. Last previous edition approved in 2015 as B894 10 (2015).DOI: 10.1520/B0894-17.3See Footnote B
13、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 information, refer to the standards Document Summary page onthe ASTM website.5Available from U.S. Government Printing Office Su
14、perintendent 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 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.7Available from DLA Document Services, Building 4/D, 700 Rob
15、bins Ave.,Philadelphia, PA 19111-5094, http:/quicksearch.dla.mil.8Available from North American Die Casting Association (NADCA), 3250Arlington Heights Rd., Suite 101, Arlington Heights, IL 60004, http:/www.diecasting.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM
16、 International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Stand
17、ards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.14.1.1 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 machi
18、ning, 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 basisof need. These shall be specified
19、 in the contract or purchaseorder, as additional procedures and extended delivery time maybe involved.4.2.1 Chemical analysis (Section 7),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 forfinis
20、h (Section 10),4.2.5 Source inspection (Section 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 com
21、position conformingto the requirements of Specification B892.5.2 See Specification B949.6. Quality Assurance See Specification B9497. Chemical Requirements7.1 LimitsThe die casting shall conform to the require-ments as to chemical composition in Table 1. Conformanceshall be determined by the produce
22、r 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.7.2 Number of SamplesSee Specification B949.7.3 Methods of SamplingSee Sp
23、ecification B949.7.4 Method of AnalysisSee Specification B949.8. 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 tensi
24、on 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 cast test bars which had a 25.4 mm g
25、age length. Thebars were tested in the as-cast condition.NOTE 1The property values of test bars cut from castings will varydepending on the solidification rate of the individual casting. Solidifica-tion and cooling rate are significantly influenced by casting section size.Also due to cooling rate an
26、d 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 shall be based onchemistry. Hardness and mechanical properties may be used when agreedby the purchaser and supplier, and s
27、pecified 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 hardness test will be performed using a500 kg load and a 10 mm ball unless otherwise specified andagreed to by supplier and user
28、. 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 be within thelimits specified on the drawings or in the contract or purchaseorder.9.1.1 Any dimensions for which a toleranc
29、e 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 confirmed in writing to the producer or supplier.10. General Quality See Specification B94911. Source Inspection See Specificatio
30、n B94912. Rejection and Retest See Specification B94913. Certification See Specification B94914. Identification Marking See Specification B94915. Preparation for Delivery See Specification B94916. Keywords16.1 ACuZinc; ACuZinc5; castings; die castings; pressuredie castings; zinc; zinc alloy die cast
31、ings; zinc metal; zinc-copper-aluminum alloysTABLE 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 maxCadmium 0.004 maxTin 0.003 maxZinc RemainderCAThe fo
32、llowing 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 used in expressing the specified limit,
33、in accordancewith the rounding method of Practice E29.BUNS designations were established in accordance with Practice E527.CDetermined arithmetically by difference.B894 172APPENDIXES(Nonmandatory Information)X1. Thermal-Physical Properties of ACuZinc5 Zinc-Copper-Aluminum Die CastingsX1.1 Table X1.1X
34、2. Mechanical Properties of ACuZinc5 Zinc-Copper-Aluminum Die CastingsX2.1 Table X2.1SUMMARY OF CHANGESCommittee B02 has identified the location of selected changes to this standard since the last issue(B894-10(2015) that may impact the use of this standard. (Approved June 1, 2017.)(1) References to
35、 Specification B949 were added where appro-priate.(2) Description in sections referenced to Specification B949were eliminated or modified.TABLE X1.1 Thermal-Physical Properties of ACuZinc5 Zinc-Copper-Aluminum Die CastingsThermo-Physical Properties 20C 50C 100CElectrical Resistivity (nm) 64 70.1 80.
36、3Electrical Conductivity (%IACS) 26.9 24.6 21.5Thermal Conductivity (W/mk) 106 108 110.5Specific Heat (J/g/K) 0.34 0.36 0.40Thermal Diffusivity (cm2/s) 0.41 0.40 0.40Coefficient of Thermal Expansion (u m/mK) 24.1 26.4 27.3Density (g/cm3) 6.85 ND NDTABLE X2.1 Mechanical Properties of ACuZinc5 Zinc-Co
37、pper-Aluminum Die CastingsMechanical PropertiesWeibull AnalysisValuesB50B1Tensile Strength, MPa 355 310Yield Strength, MPa 284 240Elongation, % 9.4 4.6Youngs Modulus 100 103MPaBrinell Hardness Number 105115(500 kg, 10 mm ball)Poissons Ratio 0.29Creep Rate, s-110-60.525.5 MPa, 150CB894 173ASTM Intern
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40、d 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 Committee on Stand
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