This article deals with evaluation of effect of forging ration on microstructural characteristics of structural steel used for special application such as connecting rods, bolts, arbors, pins, axle arm. Intensity of structural changes during forging is usually determined in dependence on the forging ratio. Forging ratio at elongation is most often calculated with use of simple relations, which are based on the change of cross section of the forged pieces. The intensity of structure development is influenced not only by the simple change of cross sections, but also by relative length of the stroke, magnitude of deformation in individual passes, manner of edging, temperature, friction and shape of anvils. The article gives an analysis of influence of the relative length of the stroke on the forging ratio. Comparison of grain size and mechanical properties on applied forging ration is presented in the article.Keywords: Open die forging, forging reduction, relative drawing out
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