Brusnitsyn S., Mysik R., Sulitsin A., Ozhgikhin I. Influence of continuous cast bar quality on cracks formation in the copper rod. In this paper the effect of the main sources of gas saturation of the copper melt at Contirod technological method for copper rod manufacturing on probability of continuous cast bar gas defects formation was studied. Metallographic analysis of continuous cast bar samples was carried out. Set the average pore size of the gas volume fraction and porosity. The average gas pores size and gas porosity volume fraction were determined. Updating of technological regimes of continuous casting will reduce the chance of copper rod cracking during the standard torsion testing.