What type of metal is most commonly cut using oxyfuel techniques?

Mild steel is the type of metal most commonly cut using oxyfuel techniques due to several factors. Oxyfuel cutting works best with ferrous materials, particularly mild steel, because it can be easily oxidized by the high-temperature flame produced during the process. The cutting action relies on the reaction of the iron in the mild steel with oxygen, which creates a rapid oxidation that allows for straight and efficient cuts.

Mild steel typically has a lower melting point compared to other metals, making it more suitable for the intense heat generated by the oxyfuel torch. This means that the cutting process can be performed more quickly and effectively. The availability and cost-effectiveness of mild steel also contribute to its popularity in industrial and fabrication environments where oxyfuel cutting is commonly used.

In contrast to mild steel, metals such as aluminum, stainless steel, and copper have properties that can complicate or hinder the oxyfuel cutting process. For instance, aluminum can oxidize quickly and requires different techniques for effective cutting, while stainless steel has a higher chromium content that can make it more resistant to the cutting process. Copper's thermal conductivity and melting point also present challenges when using oxyfuel methods. Thus, mild steel is the optimal choice for oxyfuel cutting.