X-RAY ANALYSIS OF CARBON IN 316 AUSTENITIC STAINLESS STEEL - RESULTS OF A GERMAN - FRENCH ROUND ROBIN TEST
Five specimens of 316 austenitic stainless steel (Cr, 16.3 wt%; Ni, 14.0 wt%) with carbon contents ranging from 70 to 3000 ppm have been analyzed by nine laboratories: four in Germany and five in France. The CAMEBAX and Cameca MS46 instruments were used (X-ray take-off angle, 40 degrees and 18 degrees, respectively). To decrease carbon contamination all the laboratories used a cold trap. In two laboratories the cold traps was used in conjunction with a microleak device and in four others it was employed together with a refrigerated baffel above the diffusion pump. Analysis was carried out at acceleration voltages of 10, 12 and 15 kV with beam currents between 30 and 250 nA. Generally, a diamond standard was used, but one laboratory favoured Cr-23C-6, and three employed calibration curves. Five of the seven laboratories that chose to work with a standard employed the correction procedure of Ruste and Gantois (1). With increase in the carbon content of the specimen, the scatter in the results from the different laboratories decreased. All the laboratories with the exception of one were able to analyse 3000 ppm carbon with an accuracy of better than +- 10 relative. The limit of detection calculated by the different laboratories ranged from 250 to 350 ppm.
Bibliographic Reference: 10TH INTERNATIONAL CONGRESS ON X-RAY OPTICS AND MICROANALYSIS, TOULOUSE (FRANCE), SEPT. 5-9, 1983. AVAILABILITY: CEC LUXEMBOURG, DG XIII/A2 MENTIONING PAPER E 31037 ORA
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Record Number: 1989122001300 / Last updated on: 1987-01-01
Available languages: en