Attributes . Low-Carbon Steel (carbon alloy less than 0.25%) / Medium carbon steel (carbon content 0.25 to 0.45%) / High Carbon Steel (C with a content over 0.45%) / Alloy Steel (SCM) / Stainless steel (SUS) / Copper (Cu) / Brass (Bs) / Brass cast iron (BsC) / Aluminum Rolled Material (AL) / Aluminum Alloy Casting (AC, ADC) / Zinc Alloy Casting (ZDC) . Names