... -40(depend on the quantity of the order)CuNi40(6J40)Constantan is CuNi40,also named 6J40,it is a resistance alloy ... (EMF) in association with others metals. Copper nickel alloy series:Constantan CuNi40 (6J40), CuNi1, CuNi2, CuNi6, CuNi8, CuNi10, CuNi14, CuNi19, CuNi23 ...