Copper-nickel alloy is probably pretty tough stuff. I guess it is sort of like first people into metallurgy discovered the usefulness of copper, then even better when they added some tin to get bronze, then to add zinc to get brass.
Copper-nickel alloy is probably pretty tough stuff. I guess it is sort of like first people into metallurgy discovered the usefulness of copper, then even better when they added some tin to get bronze, then to add zinc to get brass.