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4140 4330 Mod4340 / E-43404620 Vac. / AMS 62946150 Vac. / AMS 6448AISI 9310300mMARAGING 350MARAGING 300MARAGING 250

Niobyum / Columbium

It is also known as columbium. It has a hardness similar to titanium and a ductility comparable to iron. It is hypoallergenic and inert, making it suitable for use in prosthetics, implants, and jewelry. It exhibits superconductivity at cryogenic temperatures and has better magnetic penetration depth than many other elements. °It begins to oxidize above 400°C.

Mechanical and Physical Properties

density
g/cm3
8.57
Melting Temperature
°C
2415
Specific Heat
Cal/gm/°C
0.065
Coefficient of Linear Thermal Expansion
10-6 (°C) -1
7.10
Electrical Resistance
Microhms-cm
13.10
Recrystallization Temperature
°C
800
Tensile Strength
MPa – RT
275
MPa – 500 oC
205
MPa – 1000 oC
70
Hardness
HV10
130
Elastic Module
GPa
105

Application areas

It is used in capacitors, as a sealant in sodium vapor lamp arc tubes, in high-voltage leads of receiver modules, in nuclear reactors, and in superconducting magnets.

Specifications

ASTM B392
ASTM B393
AMS 7850
CAS 7440-03-01
UNS R04210
ONLINE CATALOG