1、Designation: B176 14B176 17Standard 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 parenth
2、eses indicates 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 for copper-alloy
3、die castings. The alloys specified are Copper Alloy UNSNos. C85470, C85700, C85800, C86500, C87800, C99700, and C99750.21.2 UnitsThe values stated in inch-pound units are to be regarded as standard. The values given in parentheses aremathematical conversions to SI units that are provided for informa
4、tion only and are not considered standard.1.3 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World T
5、rade Organization Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3B824 Specification for General Requirements for Copper Alloy CastingsB846 Terminology for Copper and Copper AlloysE8/E8M Test Methods for Tension Testing of Metallic MaterialsE18 Test Methods for
6、 Rockwell Hardness of Metallic MaterialsE23 Test Methods for Notched Bar Impact Testing of Metallic MaterialsE255 Practice for Sampling Copper and Copper Alloys for the Determination of Chemical CompositionE527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)2.2 America
7、n Die Casting Institute:ADCI/NADCA Standards: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 (Military Agencies)MIL-P-116 Methods of Preservation3. General Requirements3.1 T
8、he following sections of Specification B824 constitute a part of this specification.3.1.1 Terminology (Section 3),3.1.2 Number of Tests and Retests (Section 10)11) (Note to users: Paragraph 10.3 of Specification B824 applies only whenmechanical requirements are specified in the purchase order.),3.1.
9、3 Test Methods (Section 12),13),1 This specification is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.05 on Castingsand Ingots for Remelting.Current edition approved April 1, 2014April 1, 2017. Published May 2014May 2017
10、. Originally approved in 1942. Last previous edition approved in 20132014 asB176 08B176(2013).-14. DOI: 10.1520/B0176-14.10.1520/B0176-17.2 The UNS system for copper and copper alloys (see Practice E527) is a simple expansion of the former standard designation system accomplished by the addition of
11、aprefix “C” and a suffix “00.” The suffix can be used to accommodate composition variations of the base alloy.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the sta
12、ndardsstandards Document Summary page on the ASTM website.4 Available from theNorth American Die Casting Institute, 2340 Des Plaines Ave., Des Plaines, IL 60018.Association (NADCA), 3250 Arlington Heights Rd., Suite 101,Arlington Heights, IL 60004, http:/www.diecasting.org5 Available from DLA Docume
13、nt Services, Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, http:/quicksearch.dla.mil/This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technica
14、lly possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this sta
15、ndardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.4 Significance of Numerical Limits (Section 13),14),3.1.5 Inspection (Section 14),15),3.1.6 Rejection and Rehearing (Section 15),16),3.1.7 Certification (Section 16),17),3.1.8 T
16、est Report (Section 17),18),3.1.9 Product Marking (Section 18),19), and3.1.10 Supplementary Requirements.3.2 In addition, when a section with a title identical to that referenced in 3.1, above, appears in this specification, it containsadditional requirements which supplement those appearing in Spec
17、ification B824.4. Terminology4.1 For general terms related to copper and copper alloys, refer to Terminology B846.5. Ordering Information5.1 Include the following information when placing orders for die castings under this specification as applicable:5.1.1 Specification title, number, and year of is
18、sue,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 showing latestrevisions and allowances for machining, if any. Location of ejector
19、 pin marks or parting lines shall be at the option of themanufacturer unless specifically designated on the drawing.5.1.6 When die castings are purchased for agencies of the U.S. governmentGovernment the Supplementary Requirements ofSpecification B824 may be specified.5.2 The following requirements
20、are optional and should be specified in the purchase order when required.5.2.1 Inspection lot sampling (Section 98),),5.2.2 Chemical analysis of residual elements (Section 4),5.2.2 Soundness requirements (Section (10.19),),5.2.3 Mechanical requirements (Section 75),),5.2.4 Special requirements (Sect
21、ion 109),),5.2.5 Certification (Specification B824),5.2.6 Foundry test report (Specification B824),5.2.7 Witness inspection (Specification B824),5.2.8 Product marking (Specification B824), and5.2.9 Packaging requirements (Section 1212).).6. Chemical Composition6.1 The castings shall conform to the r
22、equirements for major elements as shown in Table 1.6.2 These specification composition limits do not preclude the presence of other elements. Limits may be established andanalysis required for unnamed elements agreed upon between the manufacturer or supplier and the purchaser. Copper or zinc maybe g
23、iven as remainder and may be taken as the difference between the sum of all elements analyzed and 100 %. When all namedelements in Table 1 are analyzed, their sum shall be as specified in Table 2.TABLE 1 Chemical RequirementsCopperAlloyUNSNo.Composition, % max (unless shown as a range or min)Copper
24、Tin Lead Zinc IronNickelincludingCobaltAluminum Manganese Antimony Sulfur Phosphorus SiliconC85470 60.065.0 1.04.0 0.09 Rem 0.20 . 0.101.0 . . . 0.020.25 .C85700 58.064.0A 0.501.5 0.81.5 32.040.0 0.7 1.0 0.8 . . . . 0.05C85800 57.0 minA 1.5 1.5 31.041.0 0.50 0.50 0.55 0.25 0.05 0.05 0.01 0.25BC86500
25、 55.060.0A 1.0 0.40 36.042.0 0.402.0 1.0 0.501.5 0.101.5 . . . .C87800 80.0 minA 0.25 0.09 12.016.0 0.15 0.20 0.15 0.15 0.05 0.05 0.01 3.84.2B,CC99700 54.0 minA 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 1.0D 5.0 0.253.0 17.023.0 . . . .A In determining co
26、pper min, copper may be determined as copper plus nickel.B Arsenic 0.05 max.C Magnesium 0.01 max.D Iron content above the nickel content may cause hard spots resulting in decreased machinability.B176 1726.3 It is recognized that residual elements may be present in cast copper-base alloys. Analysis s
27、hall be made for residualelements only when specified in the purchase order.6.4 If the producers or suppliers method of composition control is acceptable, sampling for chemical analysis may be waivedat the discretion of the purchaser.7. Mechanical Property Requirements7.1 Unless specified in the pur
28、chase order, acceptance of die castings under this specification shall not depend on mechanicalproperties determined by tension or impact tests. Table X1.1 shows typical mechanical properties.7.2 When minimum mechanical properties are specified in the purchase order the mechanical properties shall b
29、e agreed uponbetween the manufacturer or supplier and the purchaser.8. Dimensions, Mass, and Permissible Variations8.1 Permissible variations in dimensions shall be within the limits specified on the drawings or in the contract or purchase order.8.1.1 Any dimensions for which a tolerance is not spec
30、ified shall be in accord with ADCI Product Standard Series E1 to E16inclusive.9. Sampling9.1 An inspection lot shall consist of the production from each die or compound die on each machine for each 24 h during thefirst week of normal operation and the production for each 48 h thereafter of normal op
31、eration. Any significant change in themachine, composition, die or continuity of operation shall be considered as the start of a new lot. Die castings inspected by thismethod shall be so marked or handled during the finishing operations as not to lose their identity.9.2 Each die casting of a randoml
32、y selected sample shall be examined to determine conformance to the requirements withrespect to general quality, dimensions and identification marking. The producer or supplier may use a system of statistical qualitycontrol for such examinations.9.3 Sampling for Chemical AnalysisRefer to the Samplin
33、g section of Specification B824 and Practice E255 for samplingmethodology.10. Special Requirements10.1 Internal SoundnessWhen specified, the soundness of die castings shall conform to standards or requirements agreed uponbetween the producer or supplier and the purchaser. The number and extent of im
34、perfections shall not exceed those specified bythe purchaser. The standards or requirements may consist of radiographs, photographs or sectioned die castings.10.2 Imperfections inherent in the die castings shall not be cause for rejection provided it is demonstrated that the die castingsare in accor
35、dance with the requirements and standards agreed upon.10.3 WorkmanshipDie castings shall be of uniform quality, free of injurious discontinuities that will adversely affect theirserviceability.10.4 FinishWhen specified in the contract or purchase order the as-cast surface finish required shall confo
36、rm to standardsagreed upon between the purchaser and the producer or supplier, or as prescribed in ADCI Product Standard.10.5 Pressure TightnessWhen specified in the contract or purchase order the pressure tightness of die castings shall conformto standards agreed upon between the purchaser and the
37、producer or supplier, or as prescribed in ADCI Product Standard.11. Test Methods11.1 Analytical chemical methods are given in Specification B824 (Section 13).11.2 When tension or impact tests are made, the tension test specimen shown in Fig. 18, Standard Tension Test Specimens forDie Castings, of Te
38、st Methods E8/E8M and the impact test specimen shown in Fig. 6, Charpy (Simple-Beam) Impact TestSpecimens, Types A, B, and C, of Test Methods E23, shall be used.TABLE 2 Sum of All Named Elements AnalyzedCopper AlloyUNS No.Copper Plus NamedElements, % minC85470 99.5C85700 98.7C85800 98.7C86500 99.0C8
39、7800 99.5C99700 99.7C99750 99.7B176 17311.3 The Rockwell B hardness reading shall be made in accordance with Test Methods E18.12. Packaging and Package Marking12.1 PackagingUnless otherwise specified, the die castings shall be packaged to provide adequate protection during normalhandling and transpo
40、rtation. Each package shall contain only one type of item unless otherwise agreed upon.The type of packagingand gross weight of containers shall, unless otherwise agreed upon, be at the producers discretion, provided they are such as toensure acceptance by common or other carriers for safe transport
41、ation at the lowest rate to the delivery point.12.2 MarkingEach shipping container shall be legibly marked with the purchase order number, gross and net weights, and thesuppliers name or trademark. Marking for shipment shall be in accordance with Fed. Std. No. 123 for civil agencies andMIL-STD-129 f
42、or Military agencies.12.3 PreservationMaterial intended for prolonged storage in unheated locations shall be adequately packed and protected toavoid deterioration and damage. When specified in the contract or purchase order, material shall be preserved, packaged, andpacked in accordance with the req
43、uirements of MIL-P-116. The applicable levels shall be as specified in the contract or order.13. Keywords13.1 copper-alloy castings; die castings; UNS No. C85470; UNS No. C85700; UNS No. C85800; UNS No. C86500; UNS No.C87800; UNS No. C99700; UNS No. C99750APPENDIXES(Nonmandatory Information)X1. TYPI
44、CAL MECHANICAL PROPERTIESX1.1 The data in Table X1.1 do not constitute a part of this specification. They will indicate to the purchaser the mechanicalproperties that may be expected of test specimens when made in a die, the test specimens being cast in a test bar die and conformingto the chemical c
45、omposition specified. It should be thoroughly understood that the following figures represent die-cast testspecimens and not specimens cut from commercial die-cast parts. In the tension testing of die-cast brass specimens, the rate ofstressing up to the yield strength shall not exceed 100 ksi (700 M
46、Pa)/min. Exceedingly slow rates of testing may result in creepand hence are to be avoided. Beyond the yield strength, the rate of straining shall not exceed 0.25 in./in.min measured on the gagelength of the specimen.TABLE X1.1 Typical Mechanical Properties of Test SpecimensACopper AlloyUNS No.Tensil
47、e 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)B min 15 min . . .C85800C8780055 (379)85 (586)30 (207)50 (345)152540 (54)70 (95)55 to 6085 to 9
48、015 000 (103)20 000 (138)A ksi = 1000 psi. For explanation of SI unit MPa, see X3.1.B 0.5 % Extension under load.B176 174X2. CHARACTERISTICSX2.1 Table X2.1 shows certain casting and other outstanding characteristics which are usually considered when selecting a diecasting alloy for a specific applic
49、ation.X3. METRIC EQUIVALENTSX3.1 The SI unit for strength properties (MPa) is in accordance with the International System of Units (SI). The derived SI unitfor force is the newton (N), which is defined as that force which when applied to a body having a mass of one kilogram gives itan acceleration of one metre per second squared (N = kgm/s2). The derived SI unit for pressure or stress is the newton per squaremetre (N/m2), which has been named the pascal (Pa) by the General Conference on Weights and Measures. Since 1 ksi = 6 894 757P
