NIOBIUM PRODUCTS SERIES

CHEMICAL PROPERTIES

Grade

Nb-01

Nb-1

Nb-2

Impurity
Comtent
%, Max

Ta

0.100

0.250

2.00

O

0.05

0.150

0.10

N

0.03

0.050

0.10

C

0.020

0.030

0.50

Si

0.005

0.006

0.03

Fe

0.005

0.030

0.10

W

0.005

0.010

-

Mo

0.005

0.005

-

Ti

0.005

0.01

-

Al

-

-

0.01

Cu

0.003

0.003

0.008

Cr

-

-

0.03

P

-

-

0.02

Applications

For superconductors

For melted cast ingots.

For alloying agents.


The flexural tolerance along the length for Nb-01 and Nb-1 bars shall not be over 1% of the length. Special requirements (for example, when niobium alloy bars containing Ta, W, Zr are needed) to be agreed upon by the Supplier and buyer.

MECHANICAL PROPERTIES
Modulus of Elasticity ( x 10-6 kg/cm6) 1.05
Poisson's ratio

 

0.38

Hardness

(VHN)

60-100

Resistance to Thermal Shock

 

Good

Workability

ductile to brittle transition

-150°C

Recrystallization Temp.

GR I and II

900-1300 °C (1652-2372 °F)

 

RRR Grade

750-850 °C (1382-1562 °F)

Stress Relieving Temp. (SRT)

GR I and II 800 °C (1472 °F)
 

RRR Grade

649-663 °C (1200-1225 °F)