Attributes . Medium carbon steel (carbon content 0.25 to 0.45%) / Alloy Steel (SCM) / Ductile Cast Iron (FCD) / Copper (Cu) / Brass (Bs) / Brass cast iron (BsC) / Bronze (Pb) / Aluminum Rolled Material (AL) / Aluminum Alloy Casting (AC, ADC) / Magnesium Alloy (MC) / Zinc Alloy Casting (ZDC) / Thermoplastic plastic (vinyl chloride, nylon, etc.) . Names