Steel and iron. Determination of nitrogen content. Thermal conductimetric method after fusion in a current of inert gas (Routine method) (ISO 15351:1999)
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This International Standard specifies a thermal conductimetric method after fusion under inert gas for the determination of nitrogen in steel and iron. The method is applicable to nitrogen contents between 0,002 % (m/m) and 0,6 % (m/m).
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
Sisällysluettelo
Foreword
1 Scope
2 Normative references
3 Principle
4 Reagents and materials
5 Apparatus
6 Sampling
7 Procedure
7.1 General
7.2 Test portion
7.3 Blank test
7.4 Determination
7.5 Establishment of the calibration graph
8 Expression of results
8.1 Method of calculation
8.2 Precision
9 Test report
Annex A Features of commercial resistive electrode furnaces and nitrogen analysers (informative)
Annex В Additional information on the international cooperative tests (informative)
Annex С Graphical representation of precision data (informative)
ISO 1042:1998 Laboratory glassware -- One-mark volumetric flasks
ISO 10702:1993 Steel and iron -- Determination of nitrogen content -- Titrimetric method after distillation
ISO 10720:1997 Steel and iron -- Determination of nitrogen content -- Thermal conductimetric method after fusion in a current of inert gas
ISO 1042:1998 Laboratory glassware -- One-mark volumetric flasks
ISO 10702:1993 Steel and iron -- Determination of nitrogen content -- Titrimetric method after distillation
ISO 10720:1997 Steel and iron -- Determination of nitrogen content -- Thermal conductimetric method after fusion in a current of inert gas
ISO 14284:1996 Steel and iron -- Sampling and preparation of samples for the determination of chemical composition
ISO 3696:1987 Water for analytical laboratory use -- Specification and test methods
ISO 385-1:1984 Laboratory glassware -- Burettes -- Part 1: General requirements
ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results -- Part 1: General principles and definitions
ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results -- Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
ISO 5725-3:1994 Accuracy (trueness and precision) of measurement methods and results -- Part 3: Intermediate measures of the precision of a standard measurement method
ISO 648:1977 Laboratory glassware -- One-mark pipettes
ISO Guide 31:1981 Contents of certificates of reference materials
ISO Guide 35:1989 Certification of reference materials -- General and statistical principles