<human>:  What is the difference between stainless steel and aluminum cookware?
<bot>: Stainless steel is a ferrous metal and aluminum is a non-ferrous metal. In terms of cookware, stainless steel is usually the more durable and heavier of the two, while aluminum is lighter and less expensive. Stainless steel cookware can stand up to higher temperatures and is less likely to discolor or corrode than aluminum cookware, making it preferred by some cooks. Aluminum cookware is a good conductor of heat and conducts it much more quickly than stainless steel.