... 1.High quality, workability 2.Delivery as demand 3.Good quality with ISO certificate 4.Made-to-order service available High quality niobium wire ASTM B392 1 ... . Standard: ASTM B392 R04200, R04210, R042612. Purity : 99%~99.95%3. Density: 8.6g/cm3 4. Certificate: ISO90015. Product Feature: High ... melting point, High density, high temperature oxidation resistance, long ...