Conclusions
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1.
Changing the carbon content within broad limits has practically no effect on the resistance to fracture of medium-alloy structural steel with the same strength (σb) after quenching and tempering.
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2.
The essential factor is the method of obtaining the strength level. At the same strength, the steel with a structure of low-temper martensite has higher resistance to fracture than the steel with high-temper martensite.
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Translated from Problemy Prochnosti, No. 5, pp. 64–68, May, 1979.
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Laz'ko, V.G., Laz'ko, V.E., Ovsyannikov, B.M. et al. Effect of carbon on resistance to fracture of structural steel. Strength Mater 11, 520–525 (1979). https://doi.org/10.1007/BF00767582
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DOI: https://doi.org/10.1007/BF00767582