镍(Ni)
Nickel

≥22%

铁(Fe)
Ferric

≤0.002%

铜(Cu)
Copper

≤0.002%

铅(Pb)
Lead

≤0.001%

锌(Zn)
Zinc

≤0.003%

水不溶物
Water insolubles

≤0.02%