Niobium Crucibles / Cups
Material: RO4200, RO4210
Purity: 99.95%
Table 1. Chemical Composition:
Chemical Composition (%)
|
Material
|
Major Elements (%)
|
Impurities (Maximum %)
|
Nb
|
Fe
|
Si
|
Ni
|
W
|
Mo
|
Ti
|
Ta
|
O
|
C
|
H
|
N
|
RO4200
|
Residual
|
0.004
|
0.004
|
0.002
|
0.005
|
0.005
|
0.002
|
0.07
|
0.015
|
0.0040
|
0.0015
|
0.003
|
RO4210
|
Residual
|
0.01
|
0.01
|
0.005
|
0.02
|
0.01
|
0.004
|
0.10
|
0.02
|
0.01
|
0.0015
|
0.01
|
Table 2. Mechanical Requirements (annealed condition)
Grade
|
Tensile Strength δbpsi (MPa), ≥
|
Yield Strength δ0.2, psi (MPa), ≥
|
Elongation in 1"/2" gauge length, %, ≥
|
>=0.010
|
<0.010
|
RO4200, RO4210
|
18000 (125)
|
12000 (85)
|
25
|
20
|
Description of Niobium Crucibles / Cups
Niobium crucibles exhibit stable thermal performance and maintain resistance to high temperatures and corrosion. They are employed in the production of high-temperature superalloys and in crystal growth processes. Their chemical inertness is such that they do not react with most acids or molten metals. Consequently, consistent performance is maintained in demanding environments. These properties satisfy the requirements for scientific research and industrial applications where material purity and durability are essential.
Application of Niobium Crucibles / Cups
Niobium crucibles are used where high thermal resistance and chemical inertness are required. In materials science, they are used for the growth of single crystals from compounds such as sapphire and silicon for use in semiconductors and optical devices. In metallurgy, niobium crucibles are utilised in the processing of superalloys and specialised steels, given that they withstand the corrosive and high temperature conditions required for melting alloys. Their chemical inertness minimises contamination during chemical analyses and experiments, thereby ensuring precise and reliable results.
Specification
Table 1. Chemical composition:
Chemical Composition (%)
|
Material
|
Main elements(%)
|
Impurities (Maximum %)
|
Nb
|
Fe
|
Si
|
Ni
|
W
|
Mo
|
Ti
|
Ta
|
O
|
C
|
H
|
N
|
RO4200
|
Remainder
|
0.004
|
0.004
|
0.002
|
0.005
|
0.005
|
0.002
|
0.07
|
0.015
|
0.0040
|
0.0015
|
0.003
|
RO4210
|
Remainder
|
0.01
|
0.01
|
0.005
|
0.02
|
0.01
|
0.004
|
0.10
|
0.02
|
0.01
|
0.0015
|
0.01
|
Table 2. Mechanical requirements (annealed condition)
Grade
|
Tensile strength δbpsi (MPa), ≥
|
Yield strength δ0.2, psi (MPa),≥
|
Elongation in 1"/2" gage length, %, ≥
|
>=0.010
|
<0.010
|
RO4200, RO4210
|
18000 (125)
|
12000 (85)
|
25
|
20
|