ASTM B671-81(1999)e1

    Standard Specification for Refined Iridium

    SUPERSEDED (see Active link, below)


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    1. Scope

    1.1 This specification covers refined iridium as sponge and powder in two grades as follows:

    1.1.1 Grade 99.80 -Iridium having a purity of 99.80%.

    1.1.2 Grade 99.90 -Iridium having a purity of 99.90%.

    Note-For the purposes of determining conformance with this specification, an observed value obtained from analysis shall be rounded to the nearest unit in the last right-hand place of figures used in expressing the limiting value, in accordance with the rounding method of Practice E29.

    1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications


    ICS Code

    ICS Number Code 77.120.99 (Other non-ferrous metals and their alloys)

    UNSPSC Code

    UNSPSC Code


    DOI: 10.1520/B0671-81R99E01

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