What you're referring to as "aluminum killed" is actually drawing quality steel. The drawing quality steels are more refined, so to speak. They have a lower carbon content and a more uniform grain structure than the commercial quality steels. Both are aluminum killed though, as it's part of the process. Most of us who shape sheet metal professionally don't use the drawing quality steels, as there is no real advantage to it for how we shape. I've tried both types in a side by side test and could not see a difference. Progressive sheet metal shaping, done by hammers, beater bags, e-wheels, power hammers, planishing hammers, etc. is only moving a small amount of metal at a time, so it becomes a non issue. This topic almost always seems to come up when sheet metal shaping in discussed. Go back in time a few hundred years, what kind of steel did they use????? some of those old fella's building suits of armor sure didn't have the luxury of ordering some deep drawing quality aluminum killed steel. He had to start with a big chunk of ore and make his own sheet. We have it far too easy!!! Now, if you were to make dies and use something like this, you would want to go ahead a get the proper sheet metal for this type of operation, which would definitely be drawing quality steel. The drawing quality steel is designed for the stamping industry and should be used when stamping.