1、Designation: B176 18Standard Specification forCopper-Alloy Die Castings1This standard is issued under the fixed designation B176; 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 in
2、dicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope*1.1 This specification establishes the requirements forcopper-alloy die cast
3、ings. The alloys specified are CopperAlloy UNS Nos. C85470, C85700, C85800, C86500, C87800,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 a
4、nd are not considered standard.1.3 This international standard was developed in accor-dance 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 Or
5、ganization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3B824 Specification for General Requirements for CopperAlloy CastingsB846 Terminology for Copper and Copper AlloysE8/E8M Test Methods for Tension Testing of Metallic Ma-terialsE18 Test Methods for Rockwel
6、l Hardness of Metallic Ma-terialsE23 Test Methods for Notched Bar Impact Testing of Me-tallic MaterialsE255 Practice for Sampling Copper and Copper Alloys forthe Determination of Chemical CompositionE527 Practice for Numbering Metals and Alloys in theUnified Numbering System (UNS)2.2 ADCI/NADCA Stan
7、dards:4“E” Series Product Standards2.3 Federal Standard:5Fed. Std. No. 123 Marking for Shipment (Civil Agencies)2.4 Military Standards:5MIL-STD-129 Marking for Shipment and Storage (MilitaryAgencies)MIL-P-116 Methods of Preservation3. General Requirements3.1 The following sections of Specification B
8、824 constitutea part of this specification.3.1.1 Terminology (Section 3),3.1.2 Number of Tests and Retests (Section 11) (Note tousers: Paragraph 10.3 of Specification B824 applies only whenmechanical requirements are specified in the purchase order.),3.1.3 Test Methods (Section 13),3.1.4 Significanc
9、e of Numerical Limits (Section 14),3.1.5 Inspection (Section 15),3.1.6 Rejection and Rehearing (Section 16),3.1.7 Certification (Section 17),3.1.8 Test Report (Section 18),3.1.9 Product Marking (Section 19), and3.1.10 Supplementary Requirements.3.2 In addition, when a section with a title identical
10、to thatreferenced in 3.1, above, appears in this specification, itcontains additional requirements which supplement those ap-pearing in Specification B824.4. Terminology4.1 For general terms related to copper and copper alloys,refer to Terminology B846.1This specification is under the jurisdiction o
11、fASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.05 onCastings and Ingots for Remelting.Current edition approved March 1, 2018. Published March 2018. Originallyapproved in 1942. Last previous edition approved in 2017 as B176-17. DOI:10.1520/B0176-18
12、.2The UNS system for copper and copper alloys (see Practice E527) is a simpleexpansion of the former standard designation system accomplished by the additionof a prefix “C” and a suffix “00.” The suffix can be used to accommodatecomposition variations of the base alloy.3For referenced ASTM standards
13、, 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.4Available from North American Die Casting Association (NADCA), 3250Arlington Heights Rd.,
14、Suite 101, Arlington Heights, IL 60004, http:/www.diecasting.org.5Available from DLA Document Services, Building 4/D, 700 Robbins Avenue,Philadelphia, PA 19111-5094, http:/quicksearch.dla.mil/.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Har
15、bor 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 Standards, Guides and Recommendat
16、ions issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.15. Ordering Information5.1 Include the following information when placing ordersfor die castings under this specification as applicable:5.1.1 Specification title, number, and year of issue,5.1.2 Part name and nu
17、mber,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. Locationof ejector pin marks or parting lines
18、shall be at the option of themanufacturer unless specifically designated on the drawing.5.1.6 When die castings are purchased for agencies of theU.S. Government the Supplementary Requirements of Speci-fication B824 may be specified.5.2 The following requirements are optional and should bespecified i
19、n the purchase order when required.5.2.1 Inspection lot sampling (Section 9),5.2.2 Soundness requirements (10.1),5.2.3 Mechanical requirements (Section 7),5.2.4 Special requirements (Section 10),5.2.5 Certification (Specification B824),5.2.6 Foundry test report (Specification B824),5.2.7 Witness ins
20、pection (Specification B824),5.2.8 Product marking (Specification B824), and5.2.9 Packaging requirements (Section 12).6. Chemical 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
21、 of other elements. Limits may be established andanalysis required for unnamed elements agreed upon betweenthe manufacturer or supplier 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 eleme
22、nts in Table 1 are analyzed, their sum shall be asspecified in Table 2.6.3 It is recognized that residual elements may be present 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 compositionco
23、ntrol is acceptable, sampling for chemical analysis may bewaived at the discretion of the purchaser.7. Mechanical Property Requirements7.1 Unless specified in the purchase order, acceptance of diecastings under this specification shall not depend on mechani-cal properties determined by tension or im
24、pact tests. TableX1.1 shows typical mechanical properties.7.2 When minimum mechanical properties are specified inthe purchase order the mechanical properties shall be agreedupon between the manufacturer or supplier and the purchaser.8. Dimensions, Mass, and Permissible Variations8.1 Permissible vari
25、ations in dimensions shall be within thelimits specified on the drawings or in the contract or purchaseorder.8.1.1 Any dimensions for which a tolerance is not specifiedshall be in accord with ADCI Product Standard Series E1 toE16 inclusive.9. Sampling9.1 An inspection lot shall consist of the produc
26、tion fromeach die or compound die on each machine for each 24 hduring the first week of normal operation and the productionfor each 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. Die
27、castings inspected by this method shall be so marked orhandled during the finishing operations as not to lose theiridentity.9.2 Each die casting of a randomly selected sample shall beexamined to determine conformance to the requirements withrespect to general quality, dimensions and identification m
28、ark-ing. The producer or supplier may use a system of statisticalquality control for such examinations.TABLE 1 Chemical RequirementsCopperAlloyUNS No.Composition, % max (unless shown as a range or min)Copper Tin Lead Zinc Iron Nickel Aluminum Manganese Magnesium Antimony Sulfur Phosphorus Silicon Ar
29、senicC85470 60.065.0 1.04.0 0.09 Rem 0.20 . 0.101.0 . . . . 0.020.25 . .C85700 58.064.0 0.501.5 0.81.5 32.040.0 0.7 1.0 0.8 . . . . . 0.05 .C85800 57.0 minA1.5 1.5 31.041.0 0.50 0.50B0.55 0.25 . 0.05 0.05 0.01 0.25 0.05C86500 55.060.0A1.0 0.40 36.042.0 0.402.0 1.0B0.501.5 0.101.5 . . . . . .C87800 8
30、0.0 min 0.25 0.09 12.016.0 0.15 0.20B0.15 0.15 0.01 0.05 0.05 0.01 3.84.2 0.05C99700 54.0 min 1.0 2.0 19.025.0 1.0 4.06.0 0.503.0 11.015.0 . . . . . .C99750 55.061.0 . 0.502.5 17.023.0 1.0 5.0 0.253.0 17.023.0 . . . . . .AIn determining copper min, copper may be determined as copper plus nickel.BNic
31、kel value includes Cobalt.TABLE 2 Sum of All Named Elements AnalyzedCopper AlloyUNS No.Copper Plus NamedElements, % minC85470 99.5C85700 98.7C85800 98.7C86500 99.0C87800 99.5C99700 99.7C99750 99.7B176 1829.3 Sampling for Chemical AnalysisRefer to the Samplingsection of Specification B824 and Practic
32、e E255 for samplingmethodology.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. Thenumber and extent of imperfections shall not exceed thosespecified b
33、y 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
34、 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 purchaser a
35、nd the produceror supplier, or as prescribed in ADCI Product Standard.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 Produc
36、tStandard.11. Test Methods11.1 Analytical chemical methods are given in SpecificationB824 (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/E8M and the impact testspecimen shown in F
37、ig. 6, Charpy (Simple-Beam) Impact TestSpecimens, Types A, B, and C, of Test Methods E23, shall beused.11.3 The Rockwell B hardness reading shall be made inaccordance with Test Methods E18.12. Packaging and Package Marking12.1 PackagingUnless otherwise specified, the die cast-ings shall be packaged
38、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-vided they are such as
39、to ensure acceptance by common orother carriers for safe transportation at the 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 accord
40、ance with Fed. Std. No. 123 for civil agenciesand MIL-STD-129 for Military agencies.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
41、 be preserved,packaged, and packed in accordance with the requirements ofMIL-P-116. The applicable levels shall be as specified in thecontract or order.13. Keywords13.1 copper-alloy castings; die castings; UNS No. C85470;UNS No. C85700; UNS No. C85800; UNS No. C86500; UNSNo. C87800; UNS No. C99700;
42、UNS No. C99750APPENDIXES(Nonmandatory Information)X1. TYPICAL MECHANICAL PROPERTIESX1.1 The 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 be
43、ing cast in a test bar die andconforming to the chemical composition specified. It should bethoroughly understood that the following figures representdie-cast test specimens and not specimens cut from commercialdie-cast parts. In the tension testing of die-cast brassspecimens, the rate of stressing
44、up to the yield strength shallnot exceed 100 ksi (700 MPa)/min. Exceedingly slow rates oftesting 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.B176 183X2. CHARACTERISTICSX2.
45、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 in accor-dance with the International System of Units (SI). The
46、derivedSI unit for force is the newton (N), which is defined as thatforce 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 metre (N/m2), which has beennam
47、ed 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 to this standard since the las
48、t issue (B17617)that may impact the use of this standard. (Approved March 1, 2018.)(1) Table 1 was revised.Committee B05 has identified the location of selected changes to this standard since the last issue (B17614)that my impact the use of this standard. (Approved April 1, 2017.)(1) Added UNS Alloy
49、 No. C85470 to 1.1.(2) Revised Section 3 to correct errors in referencing theappropriate section number of Specification B824.(3) Revised 5.2 to correct errors in referencing the appropriatesection of Specification B176.(4) Removed 5.2.2.TABLE X1.1 Typical Mechanical Properties of Test SpecimensACopper AlloyUNS No.Tensile Strength,ksi (MPa)Yield Strengthpsi (0.2% Offset),ksi (MPa)Elongation in 2 in.,(50 mm) %Impact Strength Charpy,ftlbf (J)Hardness,Rockwell BModulus ofElasticity(103) ksi (GPa)C85470 50 (345) min 21B(150)Bmin 15 min . . .
