Conclusions
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1.
In Kh18N12 steel separate additions of phosphorus (0.044%), copper (0.68%), molybdenum (0.61%), tungsten (2.7%), niobium (0.62–1.6%), and nitrogen (0.3–0.35%) decrease the resistance of the steel to corrosion cracking.
Nitrogen (0.061%), boron (0.005%), and silicon (0.81%) have no significant effect on the resistance of the steel to corrosion cracking. Boron (0.095%) increases the corrosion resistance of Kh18N12 steel to corrosion cracking by approximately a factor of two.
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2.
The resistance of steel to corrosion cracking increases significantly with increasing concentrations of nickel, the amount of chromium remaining the same.
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3.
An increase in the amount of carbon from 0.004 to 0.20% and also additional tempering at 600\dgC for 1500 h have no significant effect on the resistance of Kh16N15M2B steel to corrosion cracking.
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Literature cited
D. G. Tufanov, Corrosion Resistance of Stainless Steels (handbook). [in Russian], Metallurgizdat (1963).
V. V. Romanov, Corrosion Cracking of Metals [in Russian], Moscow, Mashgiz (1960).
V. V. Skorchelletti, Theoretical Electrochemistry [in Russian], Goskhimizdat (1959).
Additional information
Central Scientific Research Institute of Ferrous Metallurgy Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 4, pp. 15–18, April, 1964
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Tufanov, D.G. Corrosion cracking of stainless steels. Met Sci Heat Treat 6, 206–208 (1964). https://doi.org/10.1007/BF00650655
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DOI: https://doi.org/10.1007/BF00650655