Gas Welding For Cutting Metal. This process uses an oxy-combustible flame and pure oxygen as the metal cutting jet. The flame temperature is approximately 3100C which is high enough to melt steel and other metals.
The fuel gas commonly acetylene when mixed with proper proportion of oxygen in a mixing chamber of welding torch produces a very hot flame of about 5700-5800F. The flame of an oxyacetylene torch used for cutting metal and welding burns at a temperature of 5432 F. Oxy-gas cutting is used chiefly in the metal structures demolition industry.
Gas welding is carried out by a flame produced by burning approximately equal volumes of oxygen and acetylene which are delivered at equal pressures from gas bottles to a welding torch.
Another type of gas welding involves the use of a single gas without the use of oxygen. Never test for gas leaks with a flame. This is just a basic overview of how to use an acetylene torch to cut metal. The most common mixed gas for shielding in welding is a CO 2 Argon Mix.