• null


Characteristics of Niobium

  • Niob, like most refractory metals, also has a high melting temperature and is therefore also heat resistant.
  • As a result of the formation of a passive layer (protective layer), niobium in the air is very resistant. Most acids therefore do not attack it at room temperature. Only hydrofluoric acid, especially in the mixture with nitric acid, as well as hot concentrated sulphuric acid corrode metallic niobium quickly.
  • In hot alkalis, niobium is also volatile as it dissolves the passive layer.
  • Niobium is very ductile and therefore very easy to forming
  • Niobium is superconducting below -267°C
  • Nb has low neutron capture cross-section
Symbol Nb
Melting point 2.468 °C
Density 8,57 g/cm³ (25°C)
Modulus of elasticity (E-module) 104 GPa
Poisson Number 0,34

Use of Niobium

  • Niobium and its alloys are used in chemical process engineering as a construction material.
  • In electronics as a component of superconductors or capacitors
  • In nuclear technology for reactor components.
  • Niobium is used in the jewelry industry or as a coin metal.
  • Nb is used as an alloy surcharge for Super Alloys
  • Nb is used as an alloy surcharge in steel production

Important Niobium Alloys

Nb 99,8% R04200 type 1 – Reactor quality, Ta <0,1 %)
Nb 99,6% R04210 type 2 – Standard quality, Ta <0,3 %)
NbZr1 R04251 type 3 – Reactor quality)
NbZr1 R04261 type 4 – Standard Quality)
NbHf10Ti1 R04295
Nb7.5Ta Niobium 7.5% Tantalum
Nb47Ti 53 Niobium 47% Titanium
Nb50Ti 50 Niobium 50% Titanium
Nb55Ti 45 Niobium 55% Titanium

Niobium Products

Nb Bars Dia 3,0-110 mm ASTM B392
Nb Wire Dia 0,5-5 mm ASTM B392
Nb Sheet + Foil 0,03 mm-0,20 mm ASTM B393
Nb Tubes seamless + welded AD2-105 mm x WT0,3-6,0 mm ASTM B394
Nb Ingots + Gussblöcke ASTM B391
Nb Fasteners ASTM B392

Pipe profiles

  • null
  • null
  • null
  • null
    Finned Tubes