Invar Ingot

Invar Ingots are used to make Magmatic Engines, Ion Thrusters, Invar Gears and Induction Smelters. Invar Ingots are made by smelting some Invar Blend in a furnace. They are incredibly expensive as they require an ore rarer than diamonds; Ferrous Ores and iron, which may or may not be a problem for you.