Summary
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1.
The addition of 0.10–0.15% Ce (calculated) to carbon steel No. 20, St. 3, and KSt. 3 improves their macrostructures, considerably decreases the concentrations of sulfur and oxygen, and increases the resilience and the ductility at high temperatures.
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2.
The critical embrittlement temperature decreases from −30 to −40°Cto −60 to −70°C.
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3.
The sensitivity to stress concentrations and the resistence to mechanical aging, and also the weldability and the resistence of welds to vibrations in MSt. 3 steel are the same with and without rare-earth metals.
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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 11, pp. 21–22, November, 1965
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Popova, N.N., Sandler, N.I. & Butko, N.I. Influence of rare-earth metals of the cerium subgroup on the embrittlement threshold of carbon steel. Met Sci Heat Treat 7, 723–724 (1966). https://doi.org/10.1007/BF00663623
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DOI: https://doi.org/10.1007/BF00663623