Oxy-fuel technology is a traditional technology of cutting metal. The metals are treated with a mixture of oxygen and combustible gases.
The propane torches are now the most widespread. The propane combines with oxygen to form a combustible mixture providing the highest combustion temperature.
However, before proceeding directly to the cutting itself, it is necessary to heat the metal at the initial point of the cut to the melting temperature (the heating temperature depends on the steel grade), after which the oxygen jet cuts the metal, while all the oxides that are formed during the heating will be removed together with the molten metal. Oxy-fuel technology is usually used for carbon low- and medium-alloy steels with thickness from 1 mm to 200-300 mm.
Mechanized oxy-fuel torches are the best solution for cutting metal of great thickness.