Tungsten is an extremely hard metallic element with an extremely high melting point and corrosion resistance in many harsh environments. Tungsten is resistant to oxidation attack and corrosion in acidic and alkaline media and is used in the elevated temperature filtration applications. Tungsten offers excellent high temperature mechanical characteristics and smallest coefficient of thermal expansion among all metals.Tungsten Square Wire Mesh or Square Wire Nettingis a welded wire mesh panel specifically manufactured by welding thin and thick diameter wires to form a square mesh hole.