Water Bath Fills

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the weight of the aluminum is
about 1.5 times the weight of the
steel. What the above means is that
it will take about three times as
much heat to warm the aluminum
tank as it will take to warm the steel
tank. Because the transmission
ability of the metal of the two tanks
is about the same, the differences
noted above are reflected in time. It
will take longer for the aluminum
tank to be warmed by the air inside
it, and it will take longer for the
aluminum tank to give up that heat
to its surroundings. The aluminum
tank has a higher “storage factor”.
What this means is that typically
(because we’re all in a hurry) the
aluminum tank is out of the bath and
out of the dive store before all the
heat gets to the outside surface. The
preceding describes the principal
components relative to the difficulty
in “cooling” aluminum tanks versus
steel tanks

Thermal conductivity of material indicates the number of Joules (a measurement of energy) which will be transferred in 1 second through 1 square metre of the material being 1 metre thick given that the opposing faces have a delta t of 1 degree celcius. Thermal conductivity of steel is 45, Al is 140-160 (SAIT thermodynamics 3)
this shows that in reality Al transfers heat 4 to 4.5 times quicker than steel
Just one flawed statement.