1、Designation: B 894 03Standard Specification forACuZinc51(Zinc-Copper-Aluminum) Alloy Die Castings2This standard is issued under the fixed designation B 894; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision.
2、 A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 inch-pound uni
3、ts are standard. TheSI values in parentheses are for information only.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 identified in the ap
4、propriateMaterial 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 in effect on
5、 dateof order acceptable form a part of this specification to theextent referenced herein:2.2 ASTM Standards:B 892 Specification for Zinc-Copper-Aluminum Alloys inIngot Form for Die Castings4B 899 Terminology Relating to Non-ferrous Metals andAlloys4E10 Test Method for Brinell Hardness of Metallic M
6、ateri-als5E29 Practice for Using Significant Digits in Test Date toDetermine Conformance with Specifications6E47 Test Methods for Chemical Analysis of Zinc DieCasting Alloys7E88 Practice for Sampling Nonferrous Metals and Alloysin Cast Form for Determination of Chemical Composition7E 527 Practice fo
7、r Numbering Metals and Alloys (UNS)8E 536 Test Method for Chemical Analysis of Zinc and ZincAlloys7E 634 Practice for Sampling of Zinc and Zinc Alloys forOptical Emission Spectrochemical Analysis72.3 Federal Standards:Fed. Std. No. 123 Marking for Shipment (Civil Agencies)92.4 Military Standard:MIL-
8、P-116 Methods of Preservation10MIL-STD-129 Marking for Shipment and Storage102.5 NADCA Standard:NADCA Product Specification Standards for Die Cast-ings113. Terminology3.1 Terms shall be defined in accordance with TerminologyB 899.3.2 Definitions of Terms Specific to This Standard:3.2.1 die casting,
9、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 following basicinformation:4.1
10、.1 This specification number and date,4.1.2 Quantity and delivery schedule, as required,4.1.3 Part name and number,4.1.4 Alloy (Table 1), and4.1.5 Drawing of die casting, when required, giving allnecessary dimensions and showing latest revisions and allow-ances for machining, if any. Location of eje
11、ctor 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 approved Ju
12、ne 10, 2003. Published August 2003. Originallyapproved in 1999. Last previous edition approved in 1999 as B 894 - 99e1.3See Footnote B in Table 1.4Annual Book of ASTM Standards, Vol 02.04.5Annual Book of ASTM Standards, Vol 03.01.6Annual Book of ASTM Standards, Vol 14.02.7Annual Book of ASTM Standar
13、ds, Vol 03.05.8Annual Book of ASTM Standards, Vol 01.01.9Available from U.S. Government Printing Office Superintendent of Documents,732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401.10Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philade
14、lphia, PA 19111-509811Available from North American Die Casting Association, 9701 West HigginsRoad, Suite 880, Rosemont, Il 600184721, USA.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-
15、2959, United States.parting 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 in the contract or purcha
16、seorder, as additional 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 in
17、spection (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 composition conformingto the requ
18、irements of Specification B 892.5.2 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
19、performance of all 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 t
20、he purchaser. The 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 i
21、nspection lot shallconsist 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 todetermin
22、e conformance to the 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 productio
23、n samples.6.2.2 When 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 det
24、ermined by the producer 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
25、 with ashipment, is 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 ch
26、emical composition 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 one of
27、the following methods:7.3.1 Samples for chemical analysis shall be taken from thematerial by drilling, sawing, milling, turning or clipping arepresentative piece or pieces to obtain a weight of preparedsample not less than 100 g. Sampling shall be in accordancewith Practice E88.7.3.2 By agreement, a
28、n appropriate spectrographic samplemay be prepared at time of manufacture in accordance withPractice E 634.7.3.3 The method of sampling cast products for spectro-chemical and other methods of analysis shall be suitable for theform of material being analyzed and the type of analyticalmethod used.7.4
29、Method of AnalysisThe determination of chemicalcomposition shall be made in accordance with suitable chemi-cal (Test Methods E47for tin or Test Method E 536), or othermethods. In case of dispute, the results secured by Test MethodE 536 and Test Method E47for tin only, shall be the basis ofacceptance
30、.8. Mechanical Properties and Tests8.1 Unless specified in the contract or purchase order, orspecified on the detail drawing, acceptance of die castingsTABLE 1 ACuZinc5 Chemical Requirements, Composition, Zinc-Copper-Aluminum Die CastingsAElementsComposition, %(Z46541)BCopper 5.0 to 6.0Aluminum 2.5
31、to 3.3Magnesium 0.025 - 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 rou
32、nded 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 designations were established in accordance with Practice E 527.CDetermined arithmetically by difference.B894032under this specificat
33、ion shall not depend on mechanical prop-erties determined by tension or impact tests.8.1.1 Tensile strength, yield strength and elongation valuesshown in Table 1. Are weibull analysis values to be used fordesign guidance. They are B50and B1values with 50 %confidence and were obtained from tests on 5
34、.3 mm diameterseparately cast test bars which had a 25.4 mm gage 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 i
35、nfluenced 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 shall be based onchemistry. Hardness and mechanical propertie
36、s 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 hardness test will be performed using a500 kg load and a 10 mm ball
37、 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 be within thelimits specified on the drawings or in the contra
38、ct 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 confirmed in writing to the producer or supplier.10. General Quality
39、10.1 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 thosespecified by the purchaser. The standards or requirements mayconsi
40、st 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 standardsagreed upon.10.3 Workmanship Die castings shall be of uniformqua
41、lity, 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 purchaser and the producer,supplier, or as prescribed in NADCA Produ
42、ct 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 supplier, or as prescribed in NADCA ProductSpecification Standards f
43、or Die Castings.11. Source Inspection11.1 If the purchaser desires that his representative inspector witness the inspection and testing of the product prior toshipment, such agreement shall be made by the purchaser andproducer or supplier as part of the contract or purchase order.11.2 When such insp
44、ection or witness of inspection andtesting is agreed upon, the producer or supplier shall afford thepurchasers representative all reasonable facilities to satisfyhim that the product meets the requirements of this specifica-tion. Inspection and tests shall be conducted so there is nounnecessary inte
45、rference with the producers operations.12. Rejection and Retest12.1 When one or more samples, depending on the 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
46、 meet the requirements ofthis specification may be resubmitted for test provided:12.2.1 The producer has removed 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 subseque
47、nt manufacturing operations may be rejected.The producer or supplier shall be responsible only for replace-ment 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 The producer or supplier
48、shall, when called for in thecontract or purchase order, furnish to the purchaser a certificateof inspection stating that each lot has been sampled, tested, andinspected in accordance with this specification, and has beenfound to meet the requirements specified.14. Identification Marking14.1 When sp
49、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 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-vi
