does anyone know the weight ratio between iron and aluminum... also if anyone knows the ration or iron to titanium or aluminum to titanium or all 3 to eachother? any help would be appreciated...

 

pcf=pounds per cubic foot=lb/ft^3
h=1ft
w=1ft
l=1ft
h=height,w=weight,l=length

480pcf=iron
165pcf=aluminum alloy 6061-T6
275pcf=titanium alloy
490pcf=stainless steel
490pcf=steel (carbon) ASTM A36,A501
450pcf=cast iron
550pcf=copper
535pcf=brass,bronze