Below is a list of Nickel Tubing manufacturers from Rockford, Illinois. Nickel tubing is a hollow, cylindrical or rectangular rod that can be used as equipment components or to transport fluids or gases. As a highly corrosion-resistant material, nickel tubing is also able to perform well in high temperature applications. Nickel is an often alloyed element, since it is able to alloy to almost any metal, and as a result, nickel tubing is predominantly fabricated from nickel alloys.