Video: Oxyfuel gas cutting is the most common process used for severing structural steel. Structural steel thicknesses from 6 to 300mm can be cut using this process. It is limited in application to steels with:
• < 5% manganese
• < 5% chromium
• < 9% nickel
• < 10% tungsten or < 5% molybdenum
This allows for most structural steel grades.
The process relies on a cutting torch tip, the function of which is to supply a stream of oxygen gas for cutting and a number of small flames to preheat the steel to cutting temperature. Preheat flames are arranged around the central oxygen stream. These flames are produced by burning the fuel gas mixed with a secondary stream of oxygen. Fuel gases commonly used are acetylene, propane (LPG) and methane (natural gas). The ASI would like to thank DAITO SEIKI for their contribution to the suite of fabrication videos included in this Structural Steel Resource Kit.