Which welding process reaches temperatures of up to 3100°C?

Oxy-acetylene welding is known for reaching very high temperatures, up to 3100°C. This process utilizes a mixture of oxygen and acetylene gases to create a flame that can melt metals, making it particularly effective for welding ferrous and non-ferrous metals. The high temperature allows for efficient melting and fusion of the workpieces, enabling strong joints.

In contrast, other welding methods like MIG and TIG welding operate at lower peak temperatures. MIG welding typically achieves temperatures around 2000°C, while TIG welding can reach around 3200°C, but it’s the focused application of oxy-acetylene that allows it to be specifically noted for its high temperature capability when mixing oxygen and acetylene. Spot welding involves joining metal pieces through the application of heat generated by resistance to electric current and does not reach such extreme temperatures.

Therefore, the ability of oxy-acetylene welding to generate exceptionally high temperatures makes it the appropriate choice for this question.