1、Designation: B671 81 (Reapproved 2017)Standard Specification forRefined Iridium1This standard is issued under the fixed designation B671; 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 parent
2、heses 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 iridium as sponge andpowder in two grades as follows:1.1.1 Grade 99.80 (UNS PO6100)Iridium having a purityof 99.80 %.
3、1.1.2 Grade 99.90Iridium having a purity of 99.90 %.NOTE 1For the purposes of determining conformance with thisspecification, an observed value obtained from analysis shall be roundedto the nearest unit in the last right-hand place of figures used in expressingthe limiting value, in accordance with
4、the rounding 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 units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to address all
5、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 appropriateSafety Data Sheet (SDS) for this product/material as providedby the manufacturer, to establish appropriate safe
6、ty and healthpractices, and determine the applicability of regulatory limi-tations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International St
7、andards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2E29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3. Materials and Manufacture3.1 The meta
8、l 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.4. Chemical Composition4.1 The refined iridium shall conform to the chemicalcomposition prescri
9、bed 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 agree upon sampling procedures used.5.2 Sampling lots shall consist of the following:5.2.1 SpongeA single refining lot.5.2.2 PowderA single
10、refining lot.6. Method of Analysis6.1 Pending the development of standardASTM methods ofchemical or spectrographic analysis, or both, the methods to beused shall be a matter of agreement between manufacturer andthe purchaser.7. Rejection and Rehearing7.1 Material that fails to conform to the require
11、ments of thisspecification may be rejected. 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 iridium satisfies the requirements of thisspecificati
12、on, it shall not be condemned for defects in theproducts in 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
13、 parts,each of which shall be placed in a sealed package, one for themanufacturer, 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 Pr
14、ecious Metals and Electrical Contact Materials.Current edition approved April 1, 2017. Published April 2017. Originallyapproved in 1980. Last previous edition approved in 2010 as B671 81 (2010).DOI: 10.1520/B0671-81R17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact A
15、STM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, 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 StatesThis international standard w
16、as developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.18. Product
17、Marking8.1 The material container shall be legibly identified by alabel or tag with the following information: Iridium (Ir), Grade_, lot number, and weight to the nearest 0.001 troy oz(0.03 g).9. Keywords9.1 iridium; refined iridium; spongeASTM International takes no position respecting the validity
18、 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
19、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 revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters
20、. 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 you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is
21、 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 serviceas
22、tm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 1 Chemical RequirementsElementAComposition, %Grade 99.80(UNS PO6100)Grade
23、 99.90Iridium, min (by difference) 99.80 99.90Rhodium, max 0.15 0.05Platinum, max 0.10 0.05Palladium, max 0.05 0.05Ruthenium, max 0.05 0.05Lead, max 0.02 0.015Silicon, max 0.02 0.01Tin, max 0.01 0.01Zinc, max 0.01 0.01Arsenic, max 0.01 0.005Bismuth, max 0.01 0.005Cadmium, max 0.01 0.005Iron, max 0.01 0.01Silver, max 0.02Gold, max 0.02Copper, max 0.02Nickel, max 0.02Chromium, max 0.02ABy agreement between manufacturer and purchaser, analyses may be requiredand limits established for elements or compounds not specified in this table.B671 81 (2017)2
