Cupronickel

Cupronickel, also known as Constantan, is a metal added by GregTech 5, GregTech 6, and Immersive Engineering. It is a mix of Copper and Nickel.

Immersive Engineering
Two Constantan Ingots can be created by combining one Copper Ingot or Copper Grit and one Nickel Ingot or Nickel Grit.