Baoji Zhipu Non-Ferrous Metals Processing Co.,Ltd is one of the most famous China niobium round manufacturers and suppliers, welcome to wholesale cheap niobium round products from our company and factory.Niobium metal is gray.melting point2468℃,boiling point4742℃,density8.57g/cm³.Niobium metal is stable in the air at room temperature.In the oxygen niobium metal not be completely oxidation.Under the high temperature niobium metal can be combined with C,N,S directly.And niobium metal can be with Ti,Zr,W to alloy.Not with inorganic acid or alkali, not soluble in aqua regia, but soluble in hydrofluoric acid.Product nameniobium cruciblegradeNb1,Nb2.purity99.95%Chemical composition：gradeChemical composition%NbFeSiNiWMoTiTaOCHNNb1remain0.0040.0040.0020.0050.0050.0020.070.0150.0040.00150.003Nb2remain0.010.010.0050.020.010.0040.10.020.010.00150.008Physical property：standardTensile Strength,pounds / inch (MPa)）yield strength（The residual deformation of 0.2%）pounds / inch (MPa)）Elongation %inch (25.4 mm) gaugeRO4200-1RO4210-218000（125）12000（85）25Niobium cruciblegrade：Nb1,Nb2purity:99.95%; Niobium metal is gray.melting point2468℃,boiling point4742℃,density8.57g/cm³.Niobium metal is stable in the air at room temperature.In the oxygen niobium metal not be completely oxidation.Under the high temperature niobium metal can be combined with C,N,S directly.And niobium metal can be with Ti,Zr,W to alloy.Not with inorganic acid or alkali, not soluble in aqua regia, but soluble in hydrofluoric acid