ASTM E1409-08

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:E1409–05 Designation:E1409–08
Standard Test Method for
Determination of Oxygen and Nitrogen in Titanium and
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Titanium Alloys by the Inert Gas Fusion Technique
This standard is issued under the fixed designation E 1409; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This test method covers the determination of oxygen in titanium and titanium alloys in concentrations from 0.01 % to
0.33%0.5 % and the determination of nitrogen in titanium and titanium alloys in concentrations from 0.003 % to 0.11%. 0.11 %.
1.2 The values stated in both inch-pound and SI units are to be regarded separately as the standard. The values given in
parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use. Specific precautionarywarning statements are given in 8.8.
2. Referenced Documents
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2.1 ASTM Standards:
E 50 Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related
Materials
E 135 Terminology Relating to Analytical Chemistry for Metals, Ores, and Related Materials
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E 173 Practice for Conducting Interlaboratory Studies of Methods for Chemical Analysis of Metals
E 882 Guide for Accountability and Quality Control in the Chemical Analysis Laboratory
E 1019Test Method for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel and in Iron Test Methods for
Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel and in Iron, Nickel, and Cobalt Alloys
E 1601 Practice for Conducting an Interlaboratory Study to Evaluate the Performance of an Analytical Method
E 1914 Practice for Use of Terms Relating to the Development and Evaluation of Methods for Chemical Analysis
3. Terminology
3.1 Definitions—For definitions of terms used in this method, refer to Terminology E 135 and E1914and Practice E 1914.
4. Summary of Test Method
4.1 This test method is intended for use with automated, commercially available, inert gas fusion analyzers. These analyzers
typically measure both oxygen and nitrogen simultaneously or sequentially utilizing parallel measurement systems.
4.2 The test sample, plus flux, is fused in a graphite crucible under a flowing inert gas stream (Ar, He)(argon, helium) at a
temperature sufficient to release oxygen and nitrogen. Oxygen combines with carbon to form carbon monoxide (CO) and nitrogen
is released as N . Depending on instrument design, the CO is oxidized to carbon dioxide (CO ) or left as CO and swept by the
2 2
inert gas stream into either an infrared or thermal conductivity detector. The detector output is compared to that of reference
materials and the result is displayed as percent oxygen. The nitrogen is swept by the inert gas stream (helium gas) into a thermal
conductivity detector. The detector response is compared to that of reference materials and the result is displayed as percent
nitrogen.
4.3 In a typical instrument for the determination of nitrogen, the sample gases are swept with inert gas through heated rare
earth/copper oxide that converts CO to CO and H to H O. The CO is absorbed on sodium
2 and hydrogen (H ) to water (H O). The CO
2 2 2
hydroxide impregnated on clay, and the H O is removed with magnesium perchlorate. The nitrogen, as N , enters the measuring
2 2
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This test method is under the jurisdiction ofASTM Committee E01 onAnalytical Chemistry for Metals, Ores, and Related Materials and is the direct responsibility of
Subcommittee E01.06 on Ti, Zr, W, Mo, Ta, Nb, Hf.
Current edition approved May 1, 2005. Published June 2005. Originally approved in 1991. Last previous edition approved in 2004 as E1409–04.
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E01 on Analytical Chemistry for Metals, Ores, and Related Materials and is the direct responsibility of Subcommittee E01.06 on Ti, Zr, W, Mo, Ta, Nb, Hf, Re.
Current edition approved June 15, 2008. Published July 2008. Originally approved in 1991. Last previous edition approved in 2005 as E 1409 – 05.
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For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
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