Conclusions
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1.
In consequence of high tempering, steels Kh8, Kh8T, Kh8VT, and Kh8SM may be imparted the mechanical properties required for the use of cold-rolled heat-exchange pipes delivered after proper heat treatment.
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2.
The presence of titanium is noticeable reflected in the character of structural transformations occuring during slow cooling from temperatures above point Ac1. The steels investigated, manifest a resistance to corrosion in sulfur-containing media two times greater than that of steel 12Kh5MA, and are in varying degrees susceptible to microstructural temper brittleness.
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3.
It is recommended that steels Kh8 and Kh8T be tested as materials for the manufacture of corrosion resistant heat-exchanger pipes for oil refineries and petroleum chemical works.
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References
Khimushin, V. Stainless Acid-Resistant and Heat-Resistant Steels, Metallurgizadt, 1954.
Preece, A., and R. D. Carter. Iron and Steel, 1953, Vol. 26, No. 6.
Kontorovich, I. Ye. Heat Treatment of Steel and Cast Iron, Metallurgizdat, 1950.
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D'yakov, V.G. Effect of Ti, W, Mo, and Si additions on the properties of chromium steel. Met Sci Heat Treat 3, 434–437 (1961). https://doi.org/10.1007/BF00812604
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DOI: https://doi.org/10.1007/BF00812604