1、Designation: B 671 81 (Reapproved 2005)Standard Specification forRefined Iridium1This standard is issued under the fixed designation B 671; 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 pare
2、ntheses 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 iridium as sponge andpowder in two grades as follows:1.1.1 Grade 99.80 (UNS PO6100) Iridium having apurity of 99.8
3、0 %.1.1.2 Grade 99.90 Iridium 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
4、with the rounding method of PracticeE29.1.2 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibili
5、ty of the user of this standard to become familiarwith all hazards including those identified in the appropriateMaterial Safety Data Sheet for this product/material as pro-vided by the manufacturer, to establish appropriate safety andhealth practices, and determine the applicability of regulatorylim
6、itations prior to use.2. Referenced Documents2.1 ASTM Standards:2E29 Practice for Using Significant 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 re
7、quirementsof 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 prescribed in Table 1.5. Sampling5.1 The value of this material is such that special attentionmust be pa
8、id 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 refining lot.6. Method of Analysis6.1 Pending the development of standardASTM methods ofchemical
9、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 requirements of thisspecification may be rejected. Rejection should be reported to1This specification is
10、 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 May 1, 2005. Published June 2005. Originallyapproved in 1980. Last previous edition approve
11、d in 1999 as B 671 81 (1999)e1.2For 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 onthe ASTM website.TABLE 1 Chemical RequirementsE
12、lementAComposition, %Grade 99.80(UNS PO6100)Grade 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, m
13、ax 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 berequired and limits established for elements or compounds not specified in thistable.1Copyright ASTM
14、 International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.the 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 requir
15、ements of this speci-fication, it shall not be condemned for defects in 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
16、shall be divided into three parts,each of which shall be placed in a sealed package, one for themanufacturer, one for the purchaser, and one for an umpire, ifnecessary.8. Product Marking8.1 The material container shall be legibly identified by alabel or tag with the following information: Iridium (I
17、r), 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 of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressl
18、y 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 responsible technical committee and must be reviewed every five years andif not revised, e
19、ither 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 careful consideration at a meeting of theresponsible technical committee, which you may atte
20、nd. 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 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 671 81 (2005)2
