1、Designation: B 561 94 (Reapproved 2005)Standard Specification forRefined Platinum1This standard is issued under the fixed designation B 561; 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 par
2、entheses indicates the year of last reapproval. Asuperscript epsilon (e) 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) P
3、latinum having apurity of 99.95 %, min, and1.1.2 Grade 99.99 Platinum having a purity of 99.99 %min.NOTE 1Other forms of unfabricated platinum of commerce are not tobe excluded under this specification.NOTE 2For the purposes of determining conformance with thisspecification, an observed value obtain
4、ed from analysis shall be 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 the standard. SI units are provided for informat
5、ion only.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 for this product/material
6、 as pro-vided by the manufacturer, to establish appropriate safety andhealth practices, and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3
7、. 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 used.3.2 The surfaces of bars and wrought forms shall exhibit
8、quality 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 sampling procedures. The purchaser andmanufacturer shall ag
9、ree upon the sampling procedures used.5.2 Lot SizeSampling lots shall consist of the following:5.2.1 SpongeA single refining lot, and1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct responsibility of SubcommitteeB02.05 on Precious M
10、etals and Electrical Contact Materials.Current edition approved May 1, 2005. Published June 2005. Originallyapproved in 1972. Last previous edition approved in 1999 as B 561 94 (1999)e1.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceas
11、tm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.TABLE 1 Chemical RequirementsElementAComposition, %Grade 99.95(UNS PO4995)Grade99.99Platinum, min (by difference) 99.95 99.99Rhodium, max 0.03 0.005Palladium, max 0.02 0.005Ru
12、thenium, max 0.01 0.002Iridium, max 0.015 0.005Gold, max 0.01 0.005Silver, max 0.005 0.003Lead, max 0.005 0.001Tin, max 0.005 0.002Zinc, max 0.005 0.002Iron, max 0.01 0.005Manganese, max 0.005 0.001Copper, max 0.01 0.004Silicon, max 0.01 0.005Calcium, max 0.005 0.003Magnesium, max 0.005 0.003Aluminu
13、m, max 0.005 0.004Nickel, max 0.005 0.001Chromium, max 0.005 0.001Antimony, max 0.005 0.002Arsenic, max 0.005 0.002Bismuth, max 0.005 0.002Tellurium, max 0.005 0.004Cadmium, max 0.005 .Molybdenum, max 0.01 0.004ABy agreement between the manufacturer and purchaser, analyses may berequired and limits
14、established for elements or compounds, including ignition loss,not specified in this table.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.2.2 Other Forms A single melt or primary consolida-tion.6. Methods of Analysis6.1 Pending th
15、e development of standardASTM 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.
16、Rejection should be reported 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
17、 the productsin which it is 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 se
18、aled package, one formanufacturer, one for the purchaser, and one for an umpire, ifnecessary.8. Product Marking8.1 The material shall be legibly identified by mark, label,or tag with the following information: platinum (Pt),Grade_ , lot or melt number, and weight to the nearest0.001 troy oz (0.03 g)
19、.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 right
20、s, 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 withdrawn. Your comments are invited either for r
21、evision 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 comments have not received a fair hearing y
22、ou 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 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).B 561 94 (2005)2
