What are the two main types of scuba diving cylinders?

The two main types of scuba diving cylinders are aluminum and steel. These materials are widely used due to their strength, durability, and resistance to corrosion, which is essential for underwater use.

Aluminum cylinders are popular because they are lightweight, which makes them easier to handle both in and out of the water. They are also resistant to rust and corrosion in saltwater environments, increasing their longevity. Furthermore, aluminum tanks are available in a variety of sizes and can often be found with a protective coating that further enhances their durability.

Steel cylinders, on the other hand, are generally favored for their higher pressure capacity compared to aluminum. This allows divers to carry more air in a smaller, shorter tank, which can be a significant advantage for deeper or longer dives. Steel tanks are also less buoyant than aluminum tanks, which can help in managing buoyancy during a dive.

By selecting between aluminum and steel, divers can choose the option that best suits their individual needs, dive style, and preferences.