Coiled metal wire,
線材
trace amount(
微量)
Carbon steel”,
Nickel alloy steel”。
nickel-free” material,
raw ore
鐵礦
naturally occurring trace Ni.
✔ Mill certificate (MTC)
actual Ni content
nickel-containing alloy steel
carbon steel.
Cu(
銅)← 微量
Cr(
鉻)← 微量
P(
磷)
•
S()
硫
carbon steel grade.
Precious metal