1、Designation: B685 01 (Reapproved 2012)Standard Specification forPalladium-Copper Electrical Contact Material1This standard is issued under the fixed designation B685; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 revision. 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 a 60 % palladiu
3、m-40 % copperalloy in the form of rod, wire, strip, and sheet material forelectrical contacts.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
4、standard.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 appropriateMaterial Safety Data Sheet (MSDS) for this product/m
5、aterialas provided by the manufacturer, to establish appropriatesafety and health practices, and determine the applicability ofregulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2B476 Specification for General Requirements for WroughtPrecious Metal Electrical Contact Mater
6、ials3. 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, annealing, turning, grinding, or pickling) as arerequired
7、to produce the prescribed properties.4. Chemical Composition4.1 Material produced under the specification shall meet therequirements of chemical composition prescribed in Table 1.4.2 By agreement between purchaser and manufacturer,analysis may be required and limits established for elements orcompou
8、nds not specified in the table of chemical composition.5. Mechanical Requirements5.1 The contract or order may specify ultimate tensilestrength, elongation, microhardness (Knoop or Vickers), hard-ness (Rockwell or Rockwell Superficial), or a combination ofthese mechanical properties as temper criter
9、ion. If the contractor order does not specify a temper criterion, then the criterionfor temper designation will be ultimate tensile strength andelongation. Table 2.5.2 Mechanical properties shall conform to the listings ofTable 3.5.3 All test specimens shall be full size when practical.5.4 All tests
10、 are to be conducted at room temperature, 65 to85F (18 to 29C).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 Electrical Contact Materials.Current edition approved May 1,
11、 2012. Published May 2012. Originallyapproved in 1981. Last previous edition approved in 2006 as B685 01 (2006).DOI: 10.1520/B0685-01R12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume i
12、nformation, refer to the standards Document Summary page onthe ASTM website.TABLE 1 Chemical RequirementsElement Weight, %PdCuBalance40.00 6 0.5Ag 0.10 maxFe 0.05 maxZn 0.06 maxCd 0.05 maxPb 0.03 maxAl 0.005 maxTotal other impurities 0.1Total impurities 0.2TABLE 2 Typical Hardness Values for StripAT
13、emper HR30T HR15T HK (100 g)BAnnealed 64 82 15537 % reduction 81 92 255ASpecification for tensile and elongation properties or hardness ranges, but notboth, shall be agreed to between supplier and purchaser at the time of contractingfor delivery.BThe Knoop hardness indentations shall be made so that
14、 the long axis of theindenter is parallel to the rolling direction of the material.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. General Requirements6.1 The provisions of Specifications B476 shall apply to allmaterials produced
15、to this specification.7. Inspection and Testing7.1 Material furnished under this specification shall beinspected by the manufacturer as listed below:7.1.1 Visual inspection in accordance with 11.2.1 in Speci-fication B476.7.1.2 Temper test (hardness or tension, but not both). Atension test is recomm
16、ended for strip below 0.030 in. (0.8 mm)thickness and for wire of any diameter. A tension test ispreferred when permitted by part size and quantity.7.1.3 Dimensional tests.7.1.4 Spectrographic or chemical analysis when indicatedby the purchase order.7.2 The purchaser shall perform such tests as are
17、required toverify the quality of material procured under the specification.8. Keywords8.1 contact alloy; electrical contact alloy; palladium; palla-dium copperAPPENDIX(Nonmandatory Information)X1. TYPICAL PHYSICAL PROPERTIES OF 60 Pd-40 CuX1.1 The following is a list of typical property valueswhich
18、are useful for engineering calculations in electricalcontact design and application:Electrical resistivity, Vcm 35 (quenched)3.5 (ordered)Density, g/cm3at 20C 10.6Approximate liquidus, C 1225Approximate solidus, C 1195ASTM International takes no position respecting the validity of any patent rights
19、asserted in connection with any item mentionedin this standard. 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 tim
20、e by the responsible technical committee and must be reviewed 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 r
21、eceive 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 I
22、nternational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or th
23、rough the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).TABLE 3 Mechanical Properties, Wire and RodTemper Ultimate Tensile Strength, psi (MPa) Minimum Elongationin 2 in. (51 mm), %min maxAnnealed 85 000(590)105 000(720)2075 % reduction 135 000(930)typical.B685 01 (2012)2
