What grades of Niobium are commonly supplied?

Common Niobium grades include:

• R04200 (Type 1) – reactor-grade unalloyed Niobium
• R04210 (Type 2) – commercial-grade unalloyed Niobium
• R04251 (Type 3) – reactor-grade Niobium with 1% Zirconium
• R04261 (Type 4) – commercial-grade Niobium with 1% Zirconium

Type 2 is the most commonly supplied grade for general industrial applications.