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The use of higher strength materials is a key element in manufacturing highly stressed components in several growth industries. These materials enable lighter cross sections that carry the same load, which means that lower masses can be used. This also results in cost saving potential. Preheating is recommended depending on material and material thickness to control the temperature gradient in the heat affected zone and aid the degassing of hydrogen. Preheat times can be significant in their contribution to overall production costs. The paper discusses flame preheating using different fuel gases, their effect on preheat time and mechanical properties as well as potential for cost savings for a variety of high strength structural steel (S460, S690, S960).