Niobium bar

Chemical Element (weight %, max.)

UNS

Type

C

O

N

H

Ta

Fe

Ti

W

Mo

Si

Ni

Zr

Nb

R04210

Pure

0.004

0.015

0.003

0.0015

0.05

0.004

0.002

0.005

0.005

0.004

0.002

/

Bal.

R04261

Nb-Zr

0.004

0.015

0.003

0.0015

0.05

0.004

0.002

0.005

0.005

0.004

0.002

1.00

Bal.

/

Nb-Zr

0.004

0.015

0.003

0.0015

0.05

0.004

0.002

0.005

0.005

0.004

0.002

10.0

Bal.

Chemistry                                                                %

Designation

Chief component

Impurities    maxmium

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

0.015

0.004

0.0015

0.002

Nb2

Remainder

0.02

0.02

0.005

0.02

0.02

0.005

0.15

0.03

0.01

0.0015

0.01

 Grade

Tensile strength  δbpsi (MPa), ≥  

Yield strength  δ0.2, psi (MPa),≥

 Elongation in 1"/2" gage length, %, ≥

RO4200-1

RO4210-2

 18000 (125)

12000 (85) 

25 

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 a: Forged square rod side should not be less than 25mm, the length should not be more than 4000mm,NbHf10-1 Alloy is rod

Note b: the length of Annealing bar being supplied is not greater than 2500mm.