1、Designation: B 176 08Standard Specification forCopper-Alloy Die Castings1This standard is issued under the fixed designation B 176; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses
2、indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specification establishes the requirements forcopper-alloy die castin
3、gs. The alloys specified are CopperAlloy UNS Nos. C85700, C85800, C86500, C 87800, C99700,and C99750.21.2 UnitsThe values stated in inch-pound units are to beregarded as standard. The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are no
4、t considered standard.2. Referenced Documents2.1 ASTM Standards:3B 824 Specification for General Requirements for CopperAlloy CastingsE8 Test Methods for Tension Testing of Metallic MaterialsE23 Test Methods for Notched Bar Impact Testing ofMetallic MaterialsE 255 Practice for Sampling Copper and Co
5、pper Alloys forthe Determination of Chemical CompositionE 527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)2.2 American Die Casting Institute:“E” Series Product Standards42.3 Federal Standard:Fed. Std. No. 123 Marking for Shipment (Civil Agencies)52.4 Military Standar
6、ds:MIL-STD-129 Marking for Shipment and Storage (MilitaryAgencies)5MIL-P-116 Methods of Preservation53. General Requirements3.1 The following sections of Specification B 824 constitutea part of this specification.3.1.1 Terminology (Section 3),3.1.2 Number of Tests and Retests (Section 10) (Note tous
7、ers: Paragraph 10.3 of Specification B 824 applies only whenmechanical requirements are specified in the purchase order.),3.1.3 Test Methods (Section 12),3.1.4 Significance of Numerical Limits (Section 13),3.1.5 Inspection (Section 14),3.1.6 Rejection and Rehearing (Section 15),3.1.7 Certification (
8、Section 16),3.1.8 Test Report (Section 17),3.1.9 Product Marking (Section 18), and3.1.10 Supplementary Requirements.3.2 In addition, when a section with a title identical to thatreferenced in 3.1, above, appears in this specification, itcontains additional requirements which supplement those ap-pear
9、ing in Specification B 824.4. Terminology4.1 For general terms related to copper and copper alloys,refer to Terminology B 846.5. Ordering Information5.1 Include the following information when placing ordersfor die castings under this specification as applicable:5.1.1 Specification title, number, and
10、 year of issue,5.1.2 Part name and number,5.1.3 Copper Alloy UNS Number,5.1.4 Quantity and delivery schedule, as required,5.1.5 Engineering drawing of die casting, when required,giving all necessary dimensions and tolerances and showinglatest revisions and allowances for machining, if any. Locationo
11、f ejector pin marks or parting lines shall be at the option of themanufacturer unless specifically designated on the drawing.1This specification is under the jurisdiction ofASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.05 onCastings and Ingots for
12、 Remelting.Current edition approved April 1, 2008. Published April 2008. Originallyapproved in 1942. Last previous edition approved in 2004 as B 176 04.2The UNS system for copper and copper alloys (see Practice E 527) is a simpleexpansion of the former standard designation system accomplished by the
13、 additionof a prefix “C” and a suffix “00”. The suffix can be used to accommodatecomposition variations of the base alloy.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, ref
14、er to the standards Document Summary page onthe ASTM website.4Available from the American Die Casting Institute, 2340 Des Plaines Ave., DesPlaines, IL 60018.5Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/www.dodss
15、p.daps.mil.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.5.1.6 When die castings are purchased for agencies of theU.S. government the Supplementary Requirements of S
16、pecifi-cation B 824 may be specified.5.2 The following requirements are optional and should bespecified in the purchase order when required.5.2.1 Inspection lot sampling (Section 8),5.2.2 Chemical analysis of residual elements (Section 4),5.2.3 Soundness requirements (Section 9),5.2.4 Mechanical req
17、uirements (Section 5),5.2.5 Special requirements (Section 9),5.2.6 Certification (Specification B 824),5.2.7 Foundry test report (Specification B 824),5.2.8 Witness inspection (Specification B 824),5.2.9 Product marking (Specification B 824), and5.2.10 Packaging requirements (Section 12).6. Chemical
18、 Composition6.1 The castings shall conform to the requirements formajor elements as shown in Table 1.6.2 These specification composition limits do not precludethe presence of other elements. Limits may be established andanalysis required for unnamed elements agreed upon betweenthe manufacturer or su
19、pplier and the purchaser. Copper or zincmay be given as remainder and may be taken as the differencebetween the sum of all elements analyzed and 100 %. When allnamed elements in Table 1 are analyzed, their sum shall be asspecified in Table 2.6.3 It is recognized that residual elements may be present
20、 incast copper-base alloys. Analysis shall be made for residualelements only when specified in the purchase order.6.4 If the producers or suppliers method of compositioncontrol is acceptable, sampling for chemical analysis may bewaived at the discretion of the purchaser.7. Mechanical Property Requir
21、ements7.1 Unless specified in the purchase order, acceptance of diecastings under this specification shall not depend on mechani-cal properties determined by tension or impact tests. TableX1.1 shows typical mechanical properties.7.2 When minimum mechanical properties are specified inthe purchase ord
22、er the mechanical properties shall be agreedupon between the manufacturer or supplier and the purchaser.8. Dimensions, Mass, and Permissible Variations8.1 Permissible variations in dimensions shall be within thelimits specified on the drawings or in the contract or purchaseorder.8.1.1 Any dimensions
23、 for which a tolerance is not specifiedshall be in accord with ADCI Product Standard SeriesE1toE16 inclusive.9. Sampling9.1 An inspection lot shall consist of the production fromeach die or compound die on each machine for each 24 hduring the first week of normal operation and the productionfor each
24、 48 h thereafter of normal operation. Any significantchange in the machine, composition, die or continuity ofoperation shall be considered as the start of a new lot. Diecastings inspected by this method shall be so marked orhandled during the finishing operations as not to lose theiridentity.9.2 Eac
25、h die casting of a randomly selected sample shall beexamined to determine conformance to the requirements withrespect to general quality, dimensions and identification mark-ing. The producer or supplier may use a system of statisticalquality control for such examinations.9.3 Sampling for Chemical An
26、alysisRefer to the Sam-pling section of Specification B 824 and Practice E 255 forsampling methodology.10. Special Requirements10.1 Internal SoundnessWhen specified, the soundness ofdie castings shall conform to standards or requirements agreedupon between the producer or supplier and the purchaser.
27、 Thenumber and extent of imperfections shall not exceed thoseTABLE 1 Chemical RequirementsComposition, % max (unless shown as a range or min)CopperAlloyUNSNo.Major Elements Residual ElementsCopper Tin Lead Zinc IronNickelinclu-dingCobaltAlumi-numManga-neseSilicon IronAnti-monyNickelCobaltSulphurPhos
28、-phorousAlumi-numManga-neseSiliconC85700 58.064.0A0.501.5 0.81.5 32.040.0 . . . . . 0.7 . 1.0 . . 0.8 . 0.05C85800 57.0 minA1.5 1.5 31.041.0 . . . . . 0.50 0.05 0.50 0.05 0.01 0.55 0.25 0.25BC86500 55.060.0A1.0 0.40 36.042.0 0.402.0 . 0.501.5 0.101.5 . . . 1.0 . . . . .C87800 80.0 minA0.25 0.09 12.0
29、16.0 . . . . 3.84.2 0.15 0.05 0.20 0.05 0.01 0.15 0.15B,CC99700 54.0 minA1.0 2.0 19.025.0 . 4.06.0 0.503.0 11.015.0 . 1.0 . . . . . . .C99750 55.061.0 . 0.502.5 17.023.0 . 5.0 0.253.0 17.023.0 . 1.0D. . . . . . .AIn determining copper min, copper may be determined as copper plus nickel.BArsenic 0.05
30、 max.CMagnesium 0.01 max.DIron content above the nickel content may cause hard spots resulting in decreased machinability.TABLE 2 Sum of All Named Elements AnalyzedCopper AlloyUNS No.Copper Plus NamedElements, % minC85700 98.7C85800 98.7C86500 99.0C87800 99.5C99700 99.7C99750 99.7B176082specified by
31、 the purchaser. The standards or requirements mayconsist of radiographs, photographs or sectioned die castings.10.2 Imperfections inherent in the die castings shall not because for rejection provided it is demonstrated that the diecastings are in accordance with the requirements and standardsagreed
32、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 tostandards agreed upon between the purchaser
33、and the produceror supplier, or as prescribed in ADCI Product Standard E 18.10.5 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 ADCI
34、ProductStandard E 17.11. Test Methods11.1 Analytical chemical methods are given in SpecificationB 824 (Section 13).11.2 When tension or impact tests are made, the tension testspecimen shown in Fig. 18, Standard Tension Test Specimensfor Die Castings, of Test Methods E8 and the impact testspecimen sh
35、own in Fig. 6, Charpy (Simple-Beam) Impact TestSpecimens, Types A, B, and C, of Test Methods E23, shall beused.12. Packaging and Package Marking12.1 PackagingUnless otherwise specified, the die cast-ings shall be packaged to provide adequate protection duringnormal handling and transportation. Each
36、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 ensure acceptance by common orother carriers for safe transportation at the
37、 lowest rate to thedelivery point.12.2 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 age
38、ncies.12.3 PreservationMaterial intended for prolonged storagein unheated locations shall be adequately packed and protectedto avoid deterioration and damage. When specified in thecontract or purchase order, material shall be preserved, pack-aged, and packed in accordance with the requirements ofMIL
39、-P-116. The applicable levels shall be as specified in thecontract or order.13. Keywords13.1 copper-alloy castings; die castings; UNS No. C85700;UNS No. C85800; UNS No. C86500; UNS No. C87800; UNSNo. C99700; UNS No. C99750APPENDIXES(Nonmandatory Information)X1. TYPICAL MECHANICAL PROPERTIESX1.1 The
40、data in Table X1.1 do not constitute a part of thisspecification. They will indicate to the purchaser the mechani-cal properties that may be expected of test specimens whenmade in a die, the test specimens being cast in a test bar die andconforming to the chemical composition specified. It should be
41、thoroughly understood that the following figures representdie-cast test specimens and not specimens cut from commercialdie-cast parts. In the tension testing of die-cast brass speci-mens, the rate of stressing up to the yield strength shall notexceed 100 ksi (700 MPa)/min. Exceedingly slow rates oft
42、esting may result in creep and hence are to be avoided.Beyond the yield strength, the rate of straining shall not exceed0.25 in./in.min measured on the gage length of the specimen.TABLE X1.1 Typical Mechanical Properties of Test SpecimensACopper AlloyUNS No.Tensile Strength,ksi (MPa)Yield Strengthps
43、i (0.2% Offset),ksi (MPa)Elongation in 2 in.,(50 mm) %Impact Strength Charpy,ftlbf (J)Hardness,Rockwell BModulus of Elasticity(3103) ksi (GPa)C85800C8780055 (379)85 (586)30 (207)50 (345)152540 (54)70 (95)55 to 6085 to 9015 000 (103)20 000 (138)Aksi = 1000 psi. For explanation of SI unit MPa, see X3.
44、1.B176083X2. CHARACTERISTICSX2.1 Table X2.1 shows certain casting and other outstand-ing characteristics which are usually considered when selectinga die casting alloy for a specific application.X3. METRIC EQUIVALENTSX3.1 The SI unit for strength properties (MPa) is inaccordance with the Internation
45、al System of Units (SI). Thederived SI unit for force is the newton (N), which is defined asthat force which when applied to a body having a mass of onekilogram gives it an acceleration of one metre per secondsquared (N = kgm/s2). The derived SI unit for pressure orstress is the newton per square me
46、tre (N/m2), which has beennamed the pascal (Pa) by the General Conference on Weightsand Measures. Since 1 ksi = 6 894 757 Pa the metric equiva-lents are expressed as megapascal (MPa), which is the same asMN/m2and N/mm2.SUMMARY OF CHANGESCommittee B05 has identified the location of selected changes t
47、o this standard since the last issue (B 176 04)that may impact the use of this standard. (Approved April 1, 2008)(1) Revised the lead entry for C87800 in Table 1.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this st
48、andard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be rev
49、iewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should 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 Standards, at the address shown below.This standard is copyrighted by ASTM Interna
