Aluminum parts are used in many industries including Air Conditioners and Automotive. Aluminum is lighter than steel and has excellent corrosion resistance.
Stainless Steel has a very high corrosion resistance. Stainless Steel is a challenge to machine because of its high strength and high ductility which means it wears out cutters very fast.
Steel parts are very common they are in almost every industry. The main advantage of steel is the low cost the downside is steel parts are susceptible to corrosion, to protect against that we us a rust inhibitor in the washing process.