Commodity:Tantalum sheetStandard: ASTM B708 98Dimension:T0.05~T20mmPurity : 99.95%min or 99.99%min conformity with ASTM B Size:
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%
Table 1: Chemical composition:
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
150
15
Ta2
800
100
50
200
TaNb3
£¼35000
TaNb20
170000-
230000
Ta2.5W
400
30000
60
Ta10W
110000
Table2: Mechanical requirements (annealed)
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¡Ý0.060"(1.524mm)
30000 (207)
20000 (138)
25000 (172)
15000 (103)
Ta-10W (RO5255)
Sheet, foil. and board
70000 (482)
60000 (414)
55000 (379)
Ta-2.5W (RO5252)
Thickness<0.125" (3.175mm)
Thickness¡Ý0.125" (3.175mm)
40000 (276)
28000 (193)
Ta-40Nb (RO5240)
Thickness<0.060"(1.524mm)
Special requirements to be agreed on by the supplier and buyer of negotiations