INDEX
TANTALUM

POWDER CHIPS ROD WIRE INGOT FOIL SHEET DISK EXIT

TANTALUM POWDER

Class Description Grade
EB Electron Beam melted Capacitor Powder 1, 2a, 2b, 3, 4a, 4b, 5a, 5b
HV Tantalum Powder for High Voltage Capacitors BB–1, BB–2, BB–3
PM Tantalum Powder of fine grain size TaPM
AG Agglomerated Tantalum Powder TaPa, TaPb

Chemical Composition
Basic Substance (% min.) and Impurities (% max.)
Grade Ta Ti W Mo 0 N Na Al Cr Co Cu
1,2a,2b,3,4a,4b 99 0.008 0,01 0,01 0.15 0.012 0.0003 0.0008 0.0008 0.0001 0.002
5a 0.008 0,003 0,001 0.25 0.012 0.0003 0.0003 0.0005 0.0001 0.001
5b 0.008 0,003 0,001 0.3 0.012 0.0003 0.0003 0.0005 0.0001 0.001
BB–1, BB–2, BB–3 0.008 0,003 0,001 0.15 0.012 0.0003 0.0005 0.0005 0.0001 0.001
TaPa, TaPb 0.008 0,003 0,001 0.35 0.012 0.0003 0.0003 0.0005 0.0001 0.001
TaPM 0.01 0.02 0.01 0.9 0.01 0.0005 0.01 0.001 0.0005 0.01

Grade Nb Fe Si C H Mg Ca Mn Ni Zr Sn
1,2a,2b,3,4a,4b 0.05 0.005 0.003 0.01 0.01 0.0003 0.0015 0.0003 0.0005 0.0005 0.0005
5a 0.1 0.002 0,0015 0,007 0.01 0.0003 0.002 0.0003 0.0005 0.0005 0.0002
5b 0.1 0.002 0,0015 0,007 0.01 0.0003 0.002 0.0003 0.0005 0.0005 0.0002
BB–1, BB–2, BB–3 0.05 0.002 0,001 0,003 0.01 0.0003 0.0015 0.0003 0.0005 0.0005 0.0003
TaPa, TaPb 0.05 0.003 0,0015 0,007 0.01 0.0003 0.002 0.0003 0.0005 0.0005 0.0003
TaPM 0.2 0.05 0.02 0.01 0.05 0.01 0.02 0.005 0.01 0.001 0.0005

Powder Properties
Property Grade
1 2a 2b 3 4a 4b 5a 5b BB1 BB2 BB3 TaPM
Grain Size, μm 40–63 5–63 5–63 5–40 20–63 20–63 3–30 3–30 40–63 20–63 5–63 <5.0
Sieves 0063 (+) 10.0 10.0 5.0 – 1.5 1.5 – – 10 2.0 5.0 –
004 (+) – – – 10.0 – – – – – – – –
004 (–) 10 – – – – – – – 10 – – –
Specific Surface Area, cm2/g 70–140 240–330 280–410 300–560 130–160 150–180 600–800 700–1000 Actual – – 2000–3000
Bulk Density, g/cm3 7.0–8.0 6.8–7.3 6.3–7.0 5.9–6.4 7.5–7.8 7.2–7.6 4.8–5.3 4.6–5.0 7.0–8.0 7.2–7.6 6.3–7.0 3.0–4.0
Specific Charge, μCb/g - - - - - - 4000–4900 4900–5600 500–1000 1100–1500 1800–2200 3700 ±700
Capacitance 7-10 14-16 17-20 19-22 10-12 12-14 - - - - - -
Leakage Current - - - - - - ≤ 2.0 ≤ 2.0 ≤ 1.0 ≤ 1.0 ≤ 1.0 -
Average Leakage Current ≤ 2.0 ≤ 3.0 ≤ 3.0 ≤ 3.0 ≤ 3.0 ≤ 3.0 - - - - - -

Dissipation Factor, %

≤ 2.0 ≤ 3.0 ≤ 3.0 ≤ 3.0 ≤ 2.0 ≤ 2.0 ≤ 2.0 ≤ 2.0 ≤ 4.0 ≤ 5.0 ≤ 7.0 -

Metallurgical Tantalum Powder Grade A, B, C

Grade Ta Nb N O C Fe Si Ti Na K S P Ca
A 99.0 0.1 0.5 0.5 - 0.07 0.05 - 0.07 - 0.01 0.01 0.05
B 99.5 0.05 0.2 0.3 - 0.01 0.01 - 0.02 - 0.005 0.005 0.002
C 98.6 0.1 1.0 - 0.2 0.07 0.05 0.02 0.02 - - - -

Packing: per 1 kg in polyethylene doses

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TANTALUM CHIPS

Chemical Composition
Basic Substance (% min.) and Impurities (% max.)
Ta Ti W C O N Na AI Cr Co Cu
99.9 0.005 0.02 0.01 0.01 0.003   0.005 0.01 0.01 0.0025

Nb Fe Si Mo H Mg Ca Mn Ni Zr Sn
0.05 0.005 0.003 0.005 0.01 0.005 0.005 0.01 0.01 0.01 0.0002

Size
Thickness, mm Width, mm Length, mm
20,0 ± 1.0 51.0 ± 5.0 51.0 ± 5.0

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TANTALUM ROD AND WIRE

Produced as non-annealed or annealed.

Chemical Composition
Basic Substance (% min.) and Impurities (ppm max.)
Ta Ti W Mg Na Al Cr Co Cu
99.92 5 30 2 2 5 4 1 5

Nb Fe Si Mo Ca Ma Ni Zr Sn
100 15 15 5 10 2 3 4 1

Diameter, mm C O N H
0.05–0.15 200 300 100 20
0.15–0.30 100 150 100 10

Size
Description Diameter
mm
Deviation
mm
Length
mm
Wire 0.05–0.15 – >50
0.15–0,3 – >25
0.3–0.45 ±0.01 >25
0.45 –1.0 ±0.02 >15
1.0–1.3 ±0.03 >15
1.3–1.5 ±0.04 >15
1.5–3.0 ±0.05 >15

Rod produced by drawing with the surface as non-turned 3.0 –6.0 ±0.2 500–4000
6.0–8.0 ±0.2 100–400

Rod produced by drawing, rolling and pressing with the surface as turned 8.0–18.0 ±0.2 100–600+5
18.0–50.0 ±0.3
50.0–90.0 ±0.5

Roughness of rod with the surface as turned ≤ RZ 40
Rod and wire of other specification to be agreed.

Packing: in packets, on bobbins, in wicks

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TANTALUM INGOT

Produced with the surface as non-machined, machined or electron beam treated.

Chemical Composition
Basic Substance (% min.) and Impurities (ppm max.)
Ta Ti W C O N Na AI Cr Co Cu
99.97 5 30 50 50 30 2 5 4 1 5

Nb Fe Si Mo H Mg Ca Mn Ni Zr Sn
80 15 15 5 5 2 10 2 3 5 1
Brinell hardness: ≤ 90 kg/mm2
Size
Diameter,
mm
Diameter maximum deviation,
mm
Length,
mm
115, 210, 235 +10 –5 300–1500

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TANTALUM FOIL AND SHEET

Produced as non-annealed or annealed.

Chemical Composition
Basic Substance (% min.) and Impurities (ppm max.)
Ta Ti W Mg Na Al Cr Co Cu
99.92 5 30 2 2 5 4 1 5

Nb Fe Si Mo Ca Mn Ni Zr Se
100 15 15 5 10 2 3 4 1

Thickness, mm C O A H
0.01-0.05 300 400 100 30
0.05-0.10 100 200 200 20
0.15-0.20 90 150 100 10

Size
Thickness,
mm
Deviation Width,
mm
Deviation Length, mm
Foil 0.01 0.02 0.03   ±0.002 30-120 +1 >=300
0.04 0.05 0.06 0.07 0.08 0.09 ±0.004 +1
0.10 0.15 0.20   ±0.02 +2
0.25 0.30 0.35 0.40   ±0.02 +2
0.60 0.60 0.70 0.80 0.90 1.0 ±0.04 +2

Sheet 1.2 1.5   ±0.1 50-150 +3 >=300
2.0 2.5 3.0   ±0.2 +3
4.0 5.0 8.0 10.0   ±0.2 +5

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TANTALUM DISK

Produced as annealed. Hardness ≤ HRB 70.

Chemical Composition
Basic Substance (Ta 99.9% min.) and Impurities (ppm max.)
Ta TI W C O N Na Al Cr Co Cu
99,92 5 30 50 100 50 2 5 4 1 5

Nb Fe Si Mo H Mg Ca Mn Ni Zr Sn
100 15 15 5 5 2 10 2 3 4 1

Size
Diameter,
mm
Deviation, mm Thickness, mm Deviation, mm
100-150 ±1 1,5-10 ±0.2
151-200 ±1 1,5-10 ±0.3
201-250 ±1 1.5-10 ±0.4
251-325 ±1 1.5-10 ±0.5

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