... .5±0.020.021.5-3.0±0.030.03Mechanical properties:gradediameter/mmTensile strength Rm/(N/mm2)Break elongation A/%Nb1 ... ,electric,Electroplating, electronics, aerospace, military industry, oil and other industries.niobium wire;standard:GB/T26012-2010;grade:Nb1,Nb2;purity:99 ... .95%;Niobium metal is gray.melting point2468℃,boiling point4742℃,density8.57g/cm ...