1. In order to be able to eliminate the produced metal oxides, the melting temperature of the oxides must be lower than the melting point of the material.
2. The ignition temperature of the material must be lower than its melting temperature.
3. Continuously maintain the ignition temperature at the cutting point. The heat loss is compensated by the heater. Non-alloy steel with carbon content of less than 0.3% and low-alloy steel with carbon equivalent of more than 0.4% can be cut after preheating. As the proportion of metal elements increases, the cutting process will become more and more difficult. For this reason, chromium steel, nickel or silicon metal, cast steel and other materials are not suitable for oxygen cutting without special precautions. These materials should be processed by other methods. Method for thermal cutting.