Registration Dossier
Registration Dossier
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EC number: 231-113-5 | CAS number: 7440-03-1
Appearance / physical state / colour
Administrative data
Link to relevant study record(s)
Description of key information
Niobium is a lustrous, grey, ductile metal.
Key value for chemical safety assessment
- Physical state at 20°C and 1013 hPa:
- solid
Additional information
Niobium is a soft and ductile metal and has good tensile ductility down to a low temperature of about -200 °C. This fact is supported by the low tensile strength of 172 MPa at 20 °C (Gupta, C.K. and Suri, A.K, Extractive Metallurgy of Niobium, 1994). Ductility is a solid material's ability to deform under tensile stress. Due to the softness and the ductility of niobium a conventional pulverization of the metal is not feasible. Fine FeNb particles (with a MMAD of about 991µM) are produced in the special comminution process of the massive FeNb alloy.
Furthermore a material Fines M45 (40 -250 µm; MMAD 485 µm) is available.
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