What is the most common steel tubing?

The most common type of steel tubing used is known as carbon steel tubing. Carbon steel tubing is widely used in various industries due to its durability, strength, and affordability. It is primarily composed of iron and carbon, with small amounts of other elements, which gives it its characteristic properties. Carbon steel tubing is often used in applications such as construction, automotive manufacturing, infrastructure, and mechanical engineering. It comes in various shapes and sizes, such as round, square, and rectangular, to suit different requirements.