Vanadium is a metal element with the element symbol V, silver gray metal. It belongs to VB group in the periodic table of elements, atomic number 23, atomic weight 50.9414, body centered cubic crystal, and common valence is + 5, + 4, + 3, + 2. Vanadium has a high melting point. It is a refractory metal. It is ductile, hard and non-magnetic. It has the ability to resist hydrochloric acid and sulfuric acid, and has better resistance to gas, salt and water corrosion than most stainless steel.