Conclusions
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1.
Alloying of austenitic stainless steels with as much as 0.8% N makes it possible to raise the ultimate strength to 100 kgf/mm2 and the yield strength to 70 kgf/mm2.
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2.
With slow cooling from 1250° the structure of these steels is of the itrogenous pearlite type.
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3.
High-nitrogen austenitic Cr-Ni stainless steels and Cr-Ni-Mn steels are not susceptible to ICC after quenching (tests by the AM method, GOST 6032-58). Sensitizing of the steel with >0.54% N induces susceptibility to ICC.
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Literature cited
V. I. Lakomskii and G. F. Torkhov, "Alloying stainless steels with nitrogen from plasma," in: Problems of Special Electrometallurgy [in Russian], VINITI, Kiev-Moscow (1971), p. 75.
G. Gryuttsner and G. Shyuller, "Development of corrosion-resistant steels with a high nitrogen content", Chern. Met., No. 9, 12 (1967).
A. V. Sherevera, G. M. Grigorenko, and V. I. Lakomskii, "Differential analysis of nitrogen in highnitrogen steels", in: Refining Remelting [in Russian], Naukova Dumka, Kiev (1974), p. 246.
Yunochin Imai and Tsuyoshi Masunioto, Science Reports, Research Institute Tohoku University,119, No. 1, 21 (1967).
M. V. Pridantsev, N. P. Talov, and F. L. Levin, High-Strength Austenitic Steels [in Russian], Metallurgiya, Moscow (1969).
Additional information
E. O. Paton Isntitute of Electric Welding. I. P. Bardin Central Scientific-Research Institute of Ferrous Metallurgy. Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 11, pp. 8–11, November, 1978.
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Torkhov, G.F., Slyshankova, V.A., Ul'yanin, E.A. et al. Structure and properties of high-nitrogen corrosion-resistant austenitic steels. Met Sci Heat Treat 20, 887–890 (1978). https://doi.org/10.1007/BF00713747
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DOI: https://doi.org/10.1007/BF00713747