1、Designation: B 522 01 (Reapproved 2006)Standard Specification forGold-Silver-Platinum Electrical Contact Alloy1This standard is issued under the fixed designation B 522; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of l
2、ast 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 69 % gold,
3、25 % silver, 6 %platinum alloy tubing, rod, wire, and sheet material for slidingelectrical 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
4、 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 by the manufacturer, to establish appropriatesafety
5、and health practices, and determine the applicability ofregulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2B 476 Specification for General Requirements for WroughtPrecious Metal Electrical Contact Materials3. Manufacture3.1 Raw materials shall be of such quality and purit
6、y 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, pickling) as are requiredto produce the prescribed properties.4. Chemical Composition4.1 Material
7、produced under the specification shall meet therequirements for chemical composition prescribed in Table 1.5. Mechanical and Electrical Requirements5.1 The contract or order may specify ultimate tensilestrength, elongation, microhardness (Knoop or Vickers), hard-ness (Rockwell or Rockwell Superficia
8、l), 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.5.1.1 Knoop hardness indentations shall be made so that thelong axis of the in
9、denter is parallel to the rolling or drawingdirection of the material.5.2 Mechanical and electrical properties shall conform tothe requirements of Table 2 and Table 3.5.3 All test specimens shall be the supplied size whenpractical.5.4 All tests are to be conducted at room temperature (65 to80F) (18
10、to 27C).6. General Requirements6.1 Specification B 476 shall apply to all materials producedto this specification.7. Inspection and Testing7.1 Material furnished under this specification shall beinspected by the manufacturer as follows:7.1.1 Visual inspection of 103,7.1.2 Temper test (hardness or te
11、nsile),7.1.3 Dimensional tests, and1This 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 June 1, 2006. Published June 2006.
12、 Originallyapproved in 1970. Last previous edition approved in 2001 as B 522 01.2For referenced ASTM standards, 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
13、onthe ASTM website.TABLE 1 Chemical RequirementsElement Composition, weight %Class I Class IIGold 68.070.0 68.569.5Silver 23.526.5 24.525.5Platinum 5.07.0 5.56.5Selected base metals (Pb, Sb, Bi, Sn,As, Cd, Ge, Ti, and Ga), max. 0.01Sulfur, max . 0.01Total platinum group metal impurities, max 0.15 0.
14、15Total base metal impurities, max 0.20 0.11Copyright 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 purchase order.7.2 The purchaser shall perform such tests as are required tover
15、ify the quality of material procured under this specification.8. Keywords8.1 contact alloy; electrical contact alloy;gold-silver-platinumAPPENDIX(Nonmandatory Information)X1. REFERENCE PROPERTIES OF GOLD-SILVER-PLATINUM ELECTRICAL CONTACT ALLOYX1.1 Table X1.1 provides a list of typical property valu
16、eswhich are useful for engineering calculations in electricalcontact design and application.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determinatio
17、n 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 responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdra
18、wn. 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 careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your c
19、omments 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 International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single
20、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 ASTM website(www.astm.org).TABLE 2 Mechanical Properties, Wire 0.010 to 0.020-in. (0.25 to0.51-mm) Diameter Strip 0.
21、003 to 0.020 in. (0.08 to 0.51 mm) thickProperties TemperAnnealed Work-HardenedKnoop hardness, 100-gf load(50 gf below 0.005 in. (0.13 mm)thick), HK70 to 105 120 to 170Ultimate tensile strength, psi, 35 000 to 45 000 60 000 to 85 000MPa 240 to 310 410 to 590Elongation in 2 in. or 50 mm, % 25 min 1 m
22、inTABLE 3 Mechanical Properties, Wire over 0.020 to 0.060-in.(0.51 to 1.52-mm) DiameterProperties TemperAnnealed Work-HardenedKnoop hardness, 100-gf load, HK 70 to 105 125 to 170Ultimate tensile strength, psi, 35 000 to 45 000 55 000 to 75 000MPa 240 to 310 380 to 520Elongation in 2 in. or 50 mm, %
23、25 min 1 minTABLE X1.1 Typical Physical PropertiesProperties TemperAnnealed Work-HardenedResistivity, Vcmil/ft, 95 95Vcm 15.7 15.7Density,Ag/cm3, 16.0 16.0dwt/in.3169 169Solidus temperature, C 1025 1025Modulus of elasticity in tension, psi, 13 3 10613 3 106MPa 89.6 3 10389.6 3 103Proportional limit, psi, 18 000 30 000MPa 120 210Adwt is the abbreviation for pennyweight, which equals120 of a troy ounce.B 522 01 (2006)2
