Thickness (mm)

Width (mm)

Length (mm)

Foil

0.03-0.09 

30-150

>200

Sheet

0.1-0.5

30- 609.6

30-1000

Board

0.5-10

50-1100

50-2000

Purity:    >=99.95% or 99.99%

Chemistry                                                               ppm

Designation

Chief component

Impurities  maxmium

Ta

Nb

Fe

Si

Ni

W

Mo

Ti

O

C

H

N

Ta1

Remainder

300

40

30

20

40

40

20

150

40

15

20

Ta2

Remainder

800

100

100

50

200

200

50

200

100

15

100

TaNb3

Remainder

��35000

100

 100

50

200

200

50

200

100

15

100

TaNb20

Remainder

170000-

230000

100

100

50

200

200

50

200

100

15

100

Ta2.5W

Remainder

400

50

30

20

30000

60

20

150

50

15

60

Ta10W

Remainder

400

50

30

20

110000

60

20

150

50

15

60

Grade and size

Annealed

Tensile strength

min, psi (MPa)

Yield strength min,psi (MPa)(2%)

Elongation min, % (1 inch gage length)

Sheet, foil. and board (RO5200, RO5400) Thickness<0.060"(1.524mm)

Thickness��0.060"(1.524mm)

30000 (207)

20000 (138)

20

25000 (172)

15000 (103)

30

Ta-10W (RO5255)

Sheet, foil. and board

70000 (482)

60000 (414)

15

70000 (482)

55000 (379)

20

Ta-2.5W  (RO5252)

Thickness<0.125" (3.175mm)

Thickness��0.125" (3.175mm)

40000 (276)

30000 (207)

20

40000 (276)

28000 (193)

20

Ta-40Nb   (RO5240)

Thickness<0.060"(1.524mm)

40000 (276)

28000 (193)

20