Plasma jet forming is a newly developed flexible forming process for sheet metals using plasma arc as the energy beam and CO2 as the cooling jet. In this paper, two different metals, low carbon mild steel and Type 304 austenitic stainless steel, were formed using the developed experimental system with series parameters. Experiments showed that the difference in forming process of these two metals depended not only upon their physical properties, but also upon their phase transformation characters. The microstructural developments in the heat affected zone of these two metals were also observed and discussed.
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