Abstract
Current trend of maximum utilization of properties of metal materials forces the fabricators to use different materials for different construction parts. Thus the fabricators of welded constructions, such as automobile constructions, today combine cold rolled steel plates with high strength low alloy steel as well as with aluminium or its alloys. Especially metallurgical joining of steel to aluminium represents certain issues resulting from different physical properties (e.g. different melting point temperature). Following paper is focused on the analysis of utilization possibilities of plasma arc at the performance of zinc coated steel to aluminium heterogenic joints and on the comparison with the MIG process using the AlSi5 filler material.

Key words
joining of dissimilar materials, plasma arc welding, MIG welding, aluminium, coated plates

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