1、Designation: B617 98 (Reapproved 2010)Standard Specification forCoin Silver Electrical Contact Alloy1This standard is issued under the fixed designation B617; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisio
2、n. A number in parentheses 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 Department of Defense.1. Scope1.1 This specification covers 90 % silver-10 % copper
3、 alloytubing, rod, wire, strip, and sheet material for electricalcontacts.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This st
4、andard 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 appropriateMaterial Safety Data Sheet (MSDS) for this product/materialas provided b
5、y the manufacturer, to establish appropriatesafety and health practices, and determine the applicability ofregulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2B277 Test Method for Hardness of Electrical Contact Ma-terialsB476 Specification for General Requirements for Wrou
6、ghtPrecious Metal Electrical Contact Materials3. Manufacture3.1 Raw materials shall be of such quality and purity thatthe finished product will have the properties and characteristicsprescribed in this specification.3.2 The material shall be finished by such operations (coldworking, heat treating, a
7、nnealing, turning, grinding, or pick-ling) as are required to produce the prescribed properties.4. Chemical Composition4.1 Material produced under this specification shall meet therequirements for chemical composition prescribed in Table 1.5. Mechanical Requirements5.1 Mechanical properties shall co
8、nform to the listings ofTable 2 or Table 3.5.2 All test specimens shall be full thickness or diameterwhen practical.5.3 All tests are to be conducted at room temperature, about68F (20C).6. General Requirements6.1 The provisions of Specification B476 shall apply to allmaterials produced to this speci
9、fication.7. Inspection and Testing7.1 Material furnished under this specification shall beinspected by the manufacturer as detailed in the applicableprovisions of Specification B476 and as listed as follows:7.1.1 Visual inspection at 103.7.1.2 Temper test (hardness or tension, but not both). Atensio
10、n test is recommended for strip below 0.030-in. (0.8-mm)thickness and for wire of any diameter.7.1.3 Dimensional tests.1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.05 on Precious Metals and Elec
11、trical Contact Materials.Current edition approved Oct. 1, 2010. Published October 2010. Originallyapproved in 1977. Last previous edition approved in 2004 as B617 98 (2004).DOI: 10.1520/B0617-98R10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service
12、at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.TABLE 1 Chemical CompositionAElement Weight %Silver 89.6 to 91.0Copper 9.0 to 10.4Zinc 0.06 maxIron 0.05 maxCadmium 0.05 maxLead 0.03 maxNickel 0.01 maxAluminum 0.
13、005 maxPhosphorus 0.02 maxTotal others 0.06 maxAAnalysis is regularly made for the elements for which specific limits are listed.If, however, the presence of “other” elements is suspected or indicated in thecourse of routine analysis, further analysis shall be made to determine that thetotal of thes
14、e “other” elements and the listed impurities are not in excess of the totalimpurities limit.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7.1.4 Spectrographic or chemical analysis when indicatedby the purchaser order.8. Keywords8.1
15、 arcing contacts; coin silver alloy; compositions; electri-cal contacts; impurities; precious metals; silver alloy; silvercopper alloySUPPLEMENTARY REQUIREMENTSThe following supplementary requirements shall apply only when specified by the purchaser in theinquiry, contract, or order, for agencies of
16、 the U.S. Government.S1. Referenced DocumentsS1.1 The following documents of the issue in effect on dateof material purchase form a part of this specification to theextent referenced herein:S1.1.1 U.S. Federal Standards:3Fed. Std. No. 102 Preservation, Packaging and PackingLevelsFed. Std. No. 123 Ma
17、rking for Shipment (Civil Agencies)S1.1.2 U.S. Military Standards:3MIL-STD-129 Marking for Shipment and StorageS2. Quality AssuranceS2.1 Responsibility for InspectionUnless otherwise speci-fied in the contract or purchase order, the manufacturer isresponsible for the performance of all inspection an
18、d testrequirements specified. Except as otherwise specified in thecontract or purchase order, the manufacturer may use his ownor any other suitable facilities for the performance of theinspection and test requirements, unless disapproved by thepurchaser at the time the order is placed. The purchaser
19、 shallhave the right to perform any of the inspections and tests setforth when such inspections and tests are deemed necessary toassure that the material conforms to prescribed requirements.S3. Preparation for DeliveryS3.1 Preservation, Packaging, and Packing:3Available from Standardization Document
20、s Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/dodssp.daps.dla.mil.TABLE 2 Mechanical Properties of Sheet and StripTemperReduction inB or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).B617 98 (2010)3
