Chemical Composition Nickel 200 | Nickel 201 Nickel 200   Nickel (Plus Cobalt) 99.00 min Copper 0.25 max Iron 0.40 max Manganese 0.25 max Carbon 0.15 max Silicon 0.35 max Sulfer 0.01 max Nickel 201   Nickel (Plus Cobalt) 99.00 mn Copper 0.25 max Iron 0.40 max Manganese 0.35 max Carbon 0.02 max Silicon 0.35 max Sulfer 0.01 max Confirms to ASTM specs: B160-61, B161-61, B162-61 and B163-61T (As applicable)