Abstract: An alloy prepared by reducing the sulfur content of ASTM UNS N06600 (Trademark Inconel Alloy 600) to an extremely small value and adding specified amounts of Nb and N, and an alloy prepared by reducing the oxygen content of Inconel Alloy 600 and adding specified amounts of Nb, N, B and Mg show a mechanical strength equivalent or superior to that of Inconel Alloy 600 and excellent hot workability, and further has intergranular corrosion resistance and integranular stress corrosion cracking resistance which are far more excellent than those of Inconel Alloy 600.

Abstract: A computer implemented process for optimizing the decarburization of a predetermined mass of molten metal by controlling the amount of coolants, the charging time of coolants, the dilution ratio of injected oxygen to inert gas, the changing time of the dilution ratio and the amount of injected gases which includes: considering from a standpoint of kinetic theory the reaction in AOD vessel is composed of following three reactions, i.e., the reaction in the vicinity of tuyeres, the reaction taking place in the ascending process of bubbles and the reaction in the interface between metal and slag; establishing the mathematical Model I; establishing the mathematical Model II calculated capably in short time and kinetically from the result using the mathematical Model I, and from the vessel factor calculated from the data of an actual operation; and further utilizing the mathematical Model II as a controlling program in an actual operation.