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This report presents the actions carried out during the project 7210-MA/320 concerning the elaboration and the metallurgy of stainless steels with high nitrogen content.

In order to determine the nitrogen solubility of these steels, two models from the literature were tested and compared to experimental results. It was shown that the Thermocalc model gives better estimations. What is more, the experimental results were used to determine a new accurate model.

In order to improve the nitrogen alloying during the steel-making practice, a model describing the nitrogen gas dissolution kinetics during bottom stirring in ladle was adapted to stainless steels (taking into account the effect of alloying elements on the solubility, diffusion coefficient and interfacial reaction rates of nitrogen in the liquid metal).

A good agreement was obtained between nitrogen yields predicted by the model and obtained during industrial heats. The model can then be used to improve the efficiency of nitrogen bubbling during the steel-making practice.

In order to improve our knowledge of the metallurgy of these steels, their solidification was studied with numerical models whose results were compared to experimental results. Good results were obtained when the Ceqcsi software, constant partition coefficients, and an Ni equivalent were used.e used.

Additional information

Authors: BENIGNI P, IRSID, Maizières-lès-Metz (FR);HUIN D, IRSID, Maizières-lès-Metz (FR);BOBADILLA M, IRSID, Maizières-lès-Metz (FR);ALBERT V, Creusot-Loire Industrie, Le Creusot (FR)
Bibliographic Reference: EUR 19417 EN (2001), pp. 56. Euro: 8.50
Availability: Available from EUR-OP sales agent URL:
ISBN: ISBN 92-894-1544-4
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