The standard 80 weighs about 32 pounds empty.
well surely it depends on how much aluminum you have!!
2.7 grams
A cubic foot of aluminum weighs 168.48 pounds.
2.600 kilograms.
a pound
The common Scott Air-Pak can vary from 10-14 lbs. for a tank with 30 minutes of air and made from carbon fiber. A tank with 60 minutes of air can weigh up to 17 lbs. and a tank made from Aluminum can weigh up to 22 lbs.
598 pounds
Aluminum tanks have a standardized width, and are much cheaper and lower maintenance than steel, as they will not rust. Yes, even stainless steel tanks will rust if any water gets in them, as not much won't in 3000 psi. However, they typically wear out more quickly (20+ years, but indefinite for steel) and they weigh less - you would think this would be a plus, but it's not cause you need more weight to make up for it.AdditionSteel tanks are actually lighter out of the water (since aluminum is a softer metal which requires there to be more aluminum than steel in a scuba cylinder) and more negative in the water (so you need less weight).
anempty can weigh about a gram, or a rasion.
A 16oz aluminum bottle typically weighs around 19-22 grams.
1500 pounds
about 32 pounds empty