they are being cold rolled to make bars
Sheet metal can be made of different materials. It is called sheet metal because of its shape which is thin and flat.
Sheet Steel, for one.
Sheet metal refers to how the metal is layed out rather than what type of metal. So therefore sheet metal can be made out of metals such as gold, brass, copper and steel. If the type of metal used is magnetic then so is the sheet metal.
Most shopping carts are made of a combination of metal and plastic. In general, the metal is a combination of galvanized steel or aluminum.
The R-value of steel sheet metal is relatively low, usually ranging from 0.02 to 0.04 per inch. This means that steel sheet metal is not a very effective insulator and does not provide much resistance to heat transfer. Additional insulation such as foam or other materials is typically needed to improve the thermal efficiency of structures made from steel sheet metal.
Most cars are made of mild steel sheet. Others are made of aluminum or even stainless steel (DeLorean).
Sheet metal is a form of metal, not a kind of metal. It could be tin, steel, aluminium, or any other metal or alloy (well, not ANY; it's probably not going to be mercury).
The cabinet (outside) is made of aluminum or steel sheet metal. The inside is made of either vacuum formed plastic or steel sheet metal. The insulation is made of fiberglass or polyfoam. The compressor, condensor, coils, and fins ( the inside components) are made of aluminum, coppyer, or alloy. The most common cooling agent is freon. The cabinet (outside) is made of aluminum or steel sheet metal. The inside is made of either vacuum formed plastic or steel sheet metal. The insulation is made of fiberglass or polyfoam. The compressor, condensor, coils, and fins ( the inside components) are made of aluminum, coppyer, or alloy. The most common cooling agent is freon.
Most school lockers are typically made of welded metal. Welded metal is inexpensive and durable. Many school lockers can also be made of painted steel metal sheet.
As of now, there are no steel ingots unless you use a mod (modification); However there are iron ingots commonly used for armor, tools, and blocks. You may also turn on the "Pirate Speak" button in the "language" bar, which may call it "steel ingot." As far as I know, there are no "steel ingots" in Minecraft without mods or the language. Some people call iron steel though.
Can't be steel
THey are stamped sheet metal and I would say they are a mild steel. Check it out with a Magnet; if the magnet sticks then it is definitely steel. If it doesn't then that does not stick that it could be an alloy with some iron in it.