This International Standard gives guidance on a method for the determination of the carbon content in steels containing other alloying elements (less than 1 % to 2 % by mass) using the calibration curve method. It specifies the sample preparation, X-ray detection, establishment of the calibration curve and the procedure for the determination of the uncertainty of the measured carbon content. It is applicable to steels containing a mass fraction of carbon of less than 1,0 %. The method is not applicable to steels with higher carbon contents, which could significantly affect the accuracy of the analysis results. This International Standard applies to analyses performed using normal beam incidence and wavelength-dispersive X-ray spectrometry; it is not designed to be used for energy-dispersive X-ray spectrometry.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
Sisällysluettelo
Foreword
1 Scope
2 Procedure
2.1 General
2.2 Reference materials
2.3 Specimen preparation
2.4 Measurement of carbon Kα X-ray intensity
2.5 Background subtraction
2.6 Establishment of the calibration curve
3 Evaluation of uncertainty
4 Test report
Annex A Method of estimating the uncertainty of the calculated value using a calibration curve (informative)
Annex B A practical example of the determination of the mass fraction of carbon and the evaluation of uncertainty in a steel (informative)