Niobium and Niobium Alloys Tube/Pipe Chemical Composition

Element

Type1 (Reactor Grade Unalloyed Nb)  R04200

Type2 (Commercial Grade Unalloyed Nb) R04210

Type3 (Reactor Grade Nb-1%Zr)         R04251

Type4 (Commercial Grade Nb-1%Zr)  R04261

Max Weight % (Except Where Otherwise Specified)

C

0.01

0.01

0.01

0.01

N

0.01

0.01

0.01

0.01

O

0.015

0.025

0.015

0.025

H

0.0015

0.0015

0.0015

0.0015

Zr

0.02

0.02

0.8-1.2

0.8-1.2

Ta

0.1

0.3

0.1

0.5

Fe

0.005

0.01

0.005

0.01

Si

0.005

0.005

0.005

0.005

W

0.03

0.05

0.03

0.05

Ni

0.005

0.005

0.005

0.005

Mo

0.010

0.020

0.010

0.050

Hf

0.02

0.02

0.02

0.02

Ti

0.02

0.03

0.02

0.03