High Purity Polished Seamless Niobium Pipe

Grade

Suplying state

Diameter

Length^a

Voluntary Standers

Nb1

Nb2

Nb3

Nb4

Cold state(Y)

Annealed^b(M)

3.0-6.5

>6.5-10.0

>10-18

>500

ASTM B392-03

Thermal processing state(R)

Annealed^b(M)

>18-25

>25-40

>40-50

>50-65

FNb1

FNb2

Thermal processing state(R)

Annealed^b(M)

3.5-5.0

>5.0-12

>500

>300

NbHf10-1

Thermal processing state(R)

Annealed^b(M)

20-80

500-2000

Note : the length of Annealing niobium tube being supplied is not greater than 2500mm.

chemistry%

designation

chief component

impurities maximum

Nb

Fe

Si

Ni

W

Mo

Ti

Ta

O

C

H

N

Nb1

Remainder

0.004

0.003

0.002

0.004

0.004

0.002

0.07

0.01

0.004

0.0012

0.002

Nb2

Remainder

0.005

0.005

0.005

0.01

0.01

0.004

0.1

0.015

0.01

0.0015

0.01

Grade

Tensile strengthδbpsi (MPa),≥

Yield strength δ0.2, psi (MPa),≥

Elongation in 1"/2" gage length,%,≥

RO4200-1

RO4210-2

18000 (125)

10500 (73)

25

Special requirements of niobium pipe to be agreed on by the supplier and buyer of negotiations