steel because of the sheer amount of mass in the steel it is an obvious win
Improved AnswerIt depends on the tank size, but in general steel is lighter out of the water. This is because steel is stronger than aluminum and you don't need as much metal to hold the pressure. If you put a steel tank next to an aluminum you will notice the steel is a smaller size for size even though it holds the same amount of gas. The aluminum tank is larger since it needs more metal to hold the pressure and thus is heavier. But steel is also more negative in the water so you can take some weight off your weight belt too.
Both 1.0 gram of steel and 1.0 gram of aluminum weigh the same. The difference lies in their density and properties, with steel being denser and heavier than aluminum.
Standard 20 gallon tank was steel and 36 gallon tank was fiberglass.
Steel typically has higher density compared to aluminum. Steel has a density of around 7.85 g/cm3, while aluminum has a density of about 2.70 g/cm3. This means that steel is heavier for the same volume compared to aluminum.
Steel or aluminum.
Steel tanks are generally heavier than aluminum tanks but hold more air at higher pressures, making them more suitable for deep dives or technical diving. Aluminum tanks are lighter and more buoyant, making them easier to transport and suitable for recreational diving. The choice between the two depends on your diving needs and preferences.
Assuming the tank is made of steel, the weight of a 1000-gallon tank would be approximately 700-800 pounds. Aluminum tanks would be lighter, around 200-300 pounds, while stainless steel tanks would be heavier, around 1000-1200 pounds.
Chemically, aluminium is an element, while steel is an alloy consisting mostly of iron. Although most aluminium items you see and use are also Alloys, strictly speaking. Steel is stronger but heavier. They have quite different material qualities.
Steel bike frames are heavier and provide a smoother ride due to their flexibility, while aluminum frames are lighter and stiffer, offering better acceleration and responsiveness. The choice between steel and aluminum depends on personal preference and riding style. Steel frames are preferred for comfort and durability, while aluminum frames are favored for speed and agility.
On the contrary it has plenty of meaning. Why not try and fly an airplane made of steel instead of aluminum. Think about it.
Aluminum frames are lighter and more resistant to rust, while steel frames are heavier and provide a smoother ride due to their flexibility. Aluminum frames are also stiffer and more responsive, while steel frames are more durable and can absorb more vibrations.
A cubic meter of steel weighs almost 3 times more than a cubic meter of aluminum. Density of steel is 7.85 g/ cm3, aluminum is 2.7 g/ cm3
mild steel is heavier