Attributes . Low-Carbon Steel (C Content of 0.25% or Less) / Medium-Carbon Steel (C Content 0.25 - 0.45%) / High-Carbon Steel (C Content Exceeding 0.45%) / Alloy Steel (SCM) / Stainless Steel (SUS) / Cast Steel (SC) / Cast Iron (FC) / Ductile Cast Iron (FCD) / Copper (Cu) / Brass (Bs) / Brass Cast Iron (BsC) / Bronze (PB) / Rolled Aluminum Material (AL) . Names