1、Designation:B56194(Reapproved 2012)Standard Specification forRefined Platinum1This standard is issued under the fixed designation B561;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 parentheses
2、indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers refined platinum as sponge,cast bar,and wrought forms(Note 1)in two grades as follows:1.1.1 Grade 99.95(UNS PO4995)Platinum having a pu
3、-rity of 99.95%,min,and1.1.2 Grade 99.99Platinum having a purity of 99.99%min.NOTE1Other forms of unfabricated platinum of commerce are not tobe excluded under this specification.NOTE2For the purposes of determining conformance with thisspecification,an observed value obtained from analysis shall be
4、 roundedto the nearest unit in the last right hand place of figures used in expressingthe limiting value,in accordance with the rounding off method of PracticeE29.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI
5、 units that are provided for information onlyand are not considered 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 th
6、e appropriateMaterial Safety Data Sheet(MSDS)for this product/materialas 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:2E29 Practice for Using Significant
7、 Digits in Test Data toDetermine Conformance with Specifications3.Materials and Manufacture3.1 The metal may be produced by any refining process thatyields a product capable of meeting the chemical requirementsof this specification.The purchaser,upon request,shall beinformed of the refining process
8、used.3.2 The surfaces of bars and wrought forms shall exhibitquality generally acceptable to the trade.4.Chemical Composition4.1 The refined platinum shall conform to the chemicalcomposition prescribed in Table 1.5.Sampling5.1 The value of this material is such that special attentionmust be paid to
9、sampling procedures.The purchaser andmanufacturer shall agree upon the sampling procedures used.5.2 Lot SizeSampling lots shall consist of the following:5.2.1 SpongeA single refining lot,and5.2.2 Other FormsAsingle melt or primary consolidation.6.Methods of Analysis6.1 Pending the development of sta
10、ndardASTM methods ofchemical or spectrographic analysis,or both,the methods to beused shall be a matter of agreement between the manufacturerand the purchaser.7.Rejection and Rehearing7.1 Material that fails to conform to the requirements of thisspecification may be rejected.Rejection should be repo
11、rted tothe producer or supplier promptly and in writing.In case ofdissatisfaction with the results of the test,the producer orsupplier may make claim for rehearing.7.1.1 If the platinum satisfies the requirements of thisspecification,it shall not be rejected for defects in the productsin which it is
12、 used.7.2 Investigation of ClaimsIn a question of chemicalcomposition,a new sample shall be drawn by representativesof both parties in accordance with Section 5.The properlymixed and quartered sample shall be divided into three parts,each of which shall be placed in a sealed package,one formanufactu
13、rer,one for the purchaser,and one for an umpire,ifnecessary.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 Nov.1,201
14、2.Published November 2012.Originallyapproved in 1972.Last previous edition approved in 2005 as B561 94(2005).DOI:10.1520/B0561-94R12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume informati
15、on,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 8.Product Marking8.1 The material shall be legibly identified by mark,label,or tag with the following information:platinum(
16、Pt),Grade_,lot or melt number,and weight to the nearest 0.001 troyoz(0.03 g).9.Keywords9.1 platinum;refined platinum;spongeASTM 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 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 t
