ISO 15349-2:2021
Unalloyed steel — Determination of low carbon content — Part 2: Infrared absorption method after combustion in an induction furnace (with preheating)
This document specifies an infrared absorption method after combustion in an induction furnace for the determination of the low carbon content in unalloyed steel.
The method is applicable to carbon contents between 0,000 3 % (mass fraction) and 0,009 % (mass fraction).
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Sampling and preparation of the test samples
8 Procedure
8.1 General
8.2 Test portion
8.3 Blank test
8.4 Determination
8.4.1 Pre-treatment of the test portion
8.4.2 Combustion of the test portion
8.5 Establishment of the calibration curve
8.5.1 Calibration with sucrose standard solutions
8.5.2 Calibration with calcium carbonate
9 Expression of results
9.1 Method of calculation
9.2 Precision
10 Test report
Annex A (informative) Features of commercial induction furnaces and infrared carbon analysers
Annex B (informative) Additional information on the international inter-laboratory test
Annex C (informative) Graphical representation of precision data
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Sampling and preparation of the test samples
8 Procedure
8.1 General
8.2 Test portion
8.3 Blank test
8.4 Determination
8.4.1 Pre-treatment of the test portion
8.4.2 Combustion of the test portion
8.5 Establishment of the calibration curve
8.5.1 Calibration with sucrose standard solutions
8.5.2 Calibration with calcium carbonate
9 Expression of results
9.1 Method of calculation
9.2 Precision
10 Test report
Annex A (informative) Features of commercial induction furnaces and infrared carbon analysers
Annex B (informative) Additional information on the international inter-laboratory test
Annex C (informative) Graphical representation of precision data
Bibliography