1、Designation: B 683 01 (Reapproved 2006)Standard Specification forPure Palladium Electrical Contact Material1This standard is issued under the fixed designation B 683; 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 (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. Scope1.1 This specification covers palladium in t
3、he form of rod,wire, strip, and sheet material for electrical contacts.1.2 The values stated in inch-pound units are to be regardedas the standard. The metric equivalents of inch-pound unitsmay be approximate.1.3 This standard does not purport to address all of thesafety concerns, if any, associated
4、 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 by the manufacturer, to establish appropriatesafety and health practices, and det
5、ermine the applicability ofregulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2B 476 Specification for General Requirements for WroughtPrecious Metal Electrical Contact MaterialsB 589 Specification for Refined Palladium3. Manufacture3.1 Raw materials shall be of such quali
6、ty 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 to produce the prescribed properties.4. Chemical Compositi
7、on4.1 Material produced under this specification shall meet therequirements of chemical composition prescribed in Table 1.NOTE 1The chemical requirements for unfabricated palladium (re-fined material) are covered in Specification B 589.4.2 By agreement between the purchaser and the manufac-turer, an
8、alysis may be required and limits established forelements or compounds not specified in the table of chemicalcomposition.5. Mechanical Requirements5.1 The contract or order may specify ultimate tensilestrength, elongation, microhardness (Knoop or Vickers), hard-ness (Rockwell or Rockwell Superficial
9、), or a combination ofthese mechanical properties as temper criterion. If the contractor order does not specify a temper criterion, then the criterionfor temper designation will be ultimate tensile strength andelongation.5.2 Mechanical properties shall conform to the listings ofTable 2.5.3 Since it
10、is not always possible to tension test some partsand shapes, the user and supplier should reach an agreementwith respect to the type of hardness tests and the acceptablerange that should be applicable. See Table 3 for typicalhardness values.5.4 All test specimens shall be full size when practical.5.
11、5 All tests shall be conducted at room temperature, 65 to85F (18 to 29C).6. General Requirements6.1 The provisions of Specification B 476 shall apply to allmaterials produced to this specification.1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and
12、is the direct responsibility of SubcommitteeB02.05 on Precious Metals and Electrical Contact Materials.Current edition approved June 1, 2006. Published June 2006. Originallyapproved in 1980. Last previous edition approved in 2001 as B 683 01.2For referenced ASTM standards, visit the ASTM website, ww
13、w.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.TABLE 1 Chemical RequirementsElement Weight, %Pd 99.8 minTotal impurities 0.2 maxPt group (Ir, Pt, Rh, Os, Ru) and Au,
14、Ag, Cu 0.1 maxTotal other impurities (within the following limits) 0.1 maxPb, Sb, Bi, Sn, As, Cd, Zn 0.01 max eachFe 0.015 maxOther elements 0.02 max each1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.7. Inspection and Testing7.1 Ma
15、terial furnished under this specification shall beinspected by the manufacturer as listed below:7.1.1 Visual inspection in accordance with the Inspectionsection in Specification B 476.7.1.2 Temper test (hardness or tension, but not both). Atension test is recommended for strip below 0.030 in. (0.8 m
16、m)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 required toverify the quality of mater
17、ial procured under the specification.8. Keywords8.1 contact alloy; electrical contact alloy; palladiumAPPENDIX(Nonmandatory Information)X1. TYPICAL PROPERTY VALUESX1.1 The following is a list of typical property valueswhich are useful for engineering calculations in electricalcontact design and appl
18、ication:Electrical conductivity, % IACS (at 20C)Resistivity:16Vcmil/ftVcm64.810.8Density:g/cm3tr oz/in.312.026.33Solidus temperature, CLiquidus temperature, CModulus of elasticity:15541554psiGPa16.3 3 106112ASTM International takes no position respecting the validity of any patent rights asserted in
19、 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 time by the re
20、sponsible 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 receive care
21、ful 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 Internationa
22、l, 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 through the A
23、STM website(www.astm.org).TABLE 2 Mechanical PropertiesReduction, % Ultimate Tensile Strength psi (MPa)Minimum Elongationin2in.Temper Wire and Rod Sheet and Strip min max %Annealed 0 0 23 000 (160) 33 000 (230) 1014 H 21 11 39 000 (270) 49 000 (340) 212 H 37 27 47 000 (320) 57 000 (390) 1Hard 60 37
24、50 000 (340) . .TABLE 3 Typical Hardness Values, Sheet and StripTemper Reduction, % Rockwell 15T Knoop (100 g)AAnnealed 0 57 6812 H 20.7 81 123Hard 37.2 82 133AThe Knoop hardness indentations shall be made so that the long axis of theindenter is parallel to the rolling direction of the material.B 683 01 (2006)2
