Aluminum is an excellent conductor of heat. This is why it is so popular for pots, pans and other cooking utensils, even though it is almost always alloyed with another metal for strength.
Aluminum's thermal conductivity is 235 watts per meter kelvin. This means it is about 59 percent as good as copper at conducting heat, and nearly three times better at conducting heat as iron.
Aluminum not only conducts heat better than iron, but it also does not rust as iron does. Instead, aluminum develops a protective skin of corundum, a substance which is much harder than aluminum itself.