Abstract
Fractal theory has been used for predicting of microstructure (ferrite, pearlite and non-metallic inclusions) effect on mechanical properties (KCV60, a0.2, crB, S) of S355J2 steel. The fractal model which has been obtained may be considered as additive database. The database can be complemented by different treatment modes and microstructure. It has been stated that good response of structure-properties has been obtained for strength characteristics (a0.i crB) of S355J2 steel and fractal size of lamellar pearlite. Also, correspondence of elongation to fractal size of ferrite has been obtained. As it has been determined the better correspondence of fractal size of non-metallic inclusions defined to impact toughness of S355J2 steel. The results have been confirmed by effect of low carbon steel microstructure on mechanical properties of the steel. The histogram of microstructure and non-metallic inclusions effect on mechanical properties of S355J2 steel has been plotted.
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