The Tungsten Bar is the refined form of Tungsten Ore, requiring four ores for each bar, and is the first alternative bar requiring four ores to craft. It is a material added in 1.2. Tungsten is the third alternate metal available. It acts like Silver grade tools and can be used as a substitute for it in recipes as well, but armor and tools made with it will be classed as Tungsten equipment. You need a standard Furnace or higher to craft them and an iron/lead anvil to craft items with it. Can also be found in Wooden Crates.
Tungsten is one tier below Platinum and one tier above Lead.