If SA stands for Steel Alloy, Then 455 Stainless Steel has a density of 0.28lb/ cu.in. according to Metal Suppliers Online website.
steel
Units of density are mass per unit volume. Unit volume might be a cubic centimeter or a cubic foot, for example. Whatever the size of your sample, a cubic foot of it is always a cubic foot, and the mass of that cubic foot will always be the same.
Using density of steel @ 490.06 pounds per cubic foot (approx) 8 * 10 * (1/12) * 490.06 = 3267.07 pounds (approx)
Steel has a Specific Gravity of 7.83. This means that a cubic foot of steel weighs 7.83 times more than a cubic foot of water (which weighs 62.4 pounds)
If the density is 20 pounds per cubic foot, then each cubic foot you have will weigh 20 lbs. However you are told that you have 30 cubic feet so :-30 * 20 = 600 lb.
Depends, of course, on the density of the steel.
sorry --- a cubic foot of what? a cubic foot of water weighs 62.5 pounds
Graphite has a density of 2.09-2.23 grams/cubic centimeter. Therefore, a cubic foot of graphite weighs on average 134.2 pounds.
Using a density of 3150 kilgrams per cubic metre = 196.65 pounds per cubic foot.
It could be pounds per cubic inch, or pounds per cubic foot, or tons per cubic yard. The only substance I know in fps is water which is 62.4 pounds per cubic foot.
g/c3 (grams per cubic centimeter) or lb/ft3 (pounds per cubic foot)
There are 62.4 pounds of water in a cubic foot. Fish have about the same density as water, so probably about the same.