Caloric lance pipe is a kind of lance pipe used to inject oxygen and carbon or other additives into the steel making process. To achieve a high level of resistance to heat and oxidation, the heated lance pipe must undergo a heating process.

The calorization process diffuses aluminum onto the surface of a lance tube and heats it to 1000°C to form a heat-resistant aluminum-iron alloy (calorized layer) on the surface.

When exposed to high temperatures, a heat-resistant aluminum oxide (alumina) layer forms on the surface of the heated layer, which inhibits severe oxidation of the lance pipe.

Caloric lance tubes have a great contribution to longer life, cost savings, and safer operations at EAF, as well as many other common furnaces in the steel industry.