C71640 nickel Cupronickel

C71640 copper iron nickel manganese alloy
C71640 nickel white copper
Standard: ASTM b111m-1992 (edition 1992 and 1993)
Name: copper nickel iron manganese alloy
Chemical composition:
Copper + silver Cu + Ag: balance
Lead Pb: ≤ 0.05
Iron (FE): 1.7 ~ 2.3
Zinc Zn: ≤ 1.0
Nickel (Ni): 29.0 ~ 32.0
Manganese (MN): 1.5 ~ 2.5