Tantalum Product Range

What is tantalum

Tantalum is a metal element with atomic number 73 and chemical symbol TA. The element corresponds to steel gray metal, which has high corrosion resistance. It does not react with hydrochloric acid, concentrated nitric acid and aqua regia under cold and hot conditions.
Tantalum mainly exists in tantalite and coexists with niobium. Tantalum has moderate hardness and ductility, and can be drawn into thin foil. Its coefficient of thermal expansion is very small. Tantalum has excellent chemical properties and high corrosion resistance. It can also be used as electrode, rectifier and electrolytic capacitor of electron tube. Medically, it is used to make thin sheets or threads to repair damaged tissues. Although the corrosion resistance of tantalum is very strong, its corrosion resistance is due to the formation of stable tantalum pentoxide (TA Ψ o ₅) protective film on the surface.

20210410005829 12291 - Tantalum Product Range

Tantalum Product Range

Pure Tantalum product is available in all the same forms and dimension ranges as the alloy details given below. Other Tantalum products: (according to the customer’s request/drawings).

Purity: 99.95min or 99.99min conformity with ASTM B 708 98

Purity: Ta-2.5W (99.75 Pure Tantalum,2.5 Pure Tungsten) Ta-7.5W (92.5 Pure Tantalum,7.5 Pure Tungsten) Ta-7.5W (90 Pure Tantalum,10 Pure Tungsten)

Purity: TaNb3 (99.7 Pure Tantalum,3 Pure Niobium) TaNb20 (80 Pure Tantalum,20 Pure Niobium) TaNb30 (70 Pure Tantalum,30 Pure Niobium) TaNb40 (60 Pure Tantalum,40 Pure Niobium)

Special requirements, customer specific sizes are always in production can be agreed on by discussion with us and our mill engineers

Tantalum Sheet, Tantalum Plate

Standard: As per ASTM B 708 98 Material: RO5200 | RO5400 | RO5255 | RO5252

Size

Thickness (mm)

Width (mm)

Length (mm)

Foil

0.03 – 0.07

30 – 200

>50

Sheet

0.07 – 0.50

30 – 700

30 – 2000

Plate

0.50 – 10.00

50 – 1000

50 – 3500

Mechanical requirements (annealed condition)

Grade and Size

Annealed

Tensile Strength minpsi (Mpa)

Yield Strength min. psi (Mpa) (2)

Elongation min,% (1-inch gage length)

SheetFoil. and Board (RO5200RO5400) Thickness<0.060”(1.524mm) Thickness≥0.060”(1.524mm)

30000 (207)

20000 (138)

20

25000 (172)

15000 (103)

30

Ta-10W(RO5255)

SheetFoil. 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)

22000(152)

25

Ta-40Nb (RO5240)

Thickness<0.060”(1.524mm)

40000 (276)

20000 (138)

25

Thickness>0.060”(1.524mm)

35000 (241)

15000 (103)

25

Tantalum rods, Tantalum bar, Tantalum Wire, Tantalum rods

Standard: As per ASTM B 365-98 Material: RO5200 | RO5400 | RO5252 (Ta-2.5W) | RO5255 (Ta-10W)

Available size: Rod 4~120mm Available size: Wire 0.3~4mm

Permissible variations in diameter for rods and wires

Diameter, inch (mm)

Tolerance <,+/-inch (mm)

0.010~0.020 excl (0.254~0.508)

< 0.0005 (0.013)

0.020~0.030 excl (0.508~0.762)

< 0.00075 (0.019)

0.030~0.060 excl (0.762~1.524)

< 0.001 (0.025)

0.060~0.090 excl (1.524~2.286)

< 0.0015 (0.038)

0.090~0.125 excl (2.286~3.175)

< 0.002 (0.051)


0.125~0.187 excl (3.175~4.750)

< 0.003 (0.076)

0.187~0.375 excl (4.750~9.525)

< 0.004 (0.102)

0.375~0.500 excl (9.525~12.70)

< 0.005 (0.127)

0.500~0.625 excl (12.70~15.88)

< 0.007 (0.178)

0.625~0.750 excl (15.88~19.05)

< 0.008 (0.203)

0.750~1.000 excl (19.05~25.40)

< 0.010(0.254)

1.000~1.500 excl (25.40~38.10)

< 0.015 (0.381)

1.500~2.000 excl (38.10~50.80)

< 0.020 (0.508)

2.000~2.500 excl (50.80~63.50)

< 0.030 (0.762)

Mechanical requirements (annealed condition)

Rod,Diameter 0.125” (3.18mm) ~2.5” (63.5mm)

Grade

Tensile strength,psi (MPa),

Yield strength,psi (MPa),

Elongation in 1 inch gage length

%,

RO5200/RO5400

25000 (172)

15000 (103)

25

RO5252

40000 (276)

28000 (193)

20

RO5255

70000 (482)

55000 (379)

20

RO5240

35000 (244)

15000 (103)

25

Mechanical requirements (annealed condition)

Wire,Diameter,0.010” (0.254mm – 0.124” (3.14mm)

Grade

Diameter Inch (mm)

Tensile Strength, psi (MPa),

Elongation,%,

RO5200/RO5400

0.010(0.254) ~0.0149(0.379)

35000 (241)

10

0.015(0.381) ~0.0249(0.633)

35000 (241)

15

0.025(0.635) ~0.124(3.14)

30000 (207)

20

RO5252

0.010(0.254) ~0.0149(0.379)

40000 (276)

5

0.015(0.381) ~0.0249(0.633)

40000 (276)

10

0.025(0.635) ~0.124(3.14)

40000 (276)

15

RO5255

0.010(0.254) ~0.0149(0.379)

70000 (482)

5

0.015(0.381) ~0.0249(0.633)

70000 (482)

10

0.025(0.635) ~0.124(3.14)

70000 (482)

15

RO5240

0.010(0.254) ~0.0149(0.379)

35000 (244)

10

0.015(0.381) ~0.0249(0.633)

35000 (244)

15

0.025(0.635) ~0.124(3.14)

35000 (244)

20

Tantalum rod bar Note: 10” (254mm) gage length to 0.050”(1.27mm) diameter and 1” (25.4mm) or 2”(50.8mm) gage length over 0.050”(1.27mm) diameter.

Tantalum target, Tantalum sputtering targets, Tantalum- tungsten Alloy targets

Material: RO5200 | RO5400 | RO5252 (Ta-2.5W) | RO5255 (Ta-10W)

Size:

  • Circular Targets: Diameter 15mm up to 400mm x Thickness 3mm up to 28mm
  • Rectangular Targets: Thickness 1mm up to 40mm x Width up to 1000mm x Length up to 3000mm

TANTALUM  SPECIFICATION

ASTM B365 –Standard Specification for Tantalum and Tantalum Alloys – Rod and Wire

1. Scope Active Standard ASTM B365

1.1. This specification covers unalloyed and alloyed tantalum rod and wire.

1.2. The materials covered by this specification are:

1.2.1 R05200, unalloyed tantalum, electron-beam furnace or vacuum-arc melt, or both,

1.2.2 R05400, unalloyed tantalum, powder-metallurgy consolidation,

1.2.3 R05255, tantalum alloy, 90 % tantalum, 10 % tungsten, electron-beam furnace or vacuum-arc melt, or both,

1.2.4 R05252, tantalum alloy, 97.5 % tantalum, 2.5 % tungsten, electron-beam furnace or vacuum-arc melt, or both, and

1.2.5 R05240 tantalum alloy, 60 % tantalum, 40 % niobium, electron-beam furnace or vacuum-arc melt, or both.

1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

ASTM B521 –Standard Specification for Tantalum and Tantalum Alloys – Seamless and Welded Tubes

1. Scope Active Standard ASTM B521

1.1 This specification covers tantalum and tantalum alloy seamless and welded tubes of the following grades:

1.1.1 UNS Grade R05400—Unalloyed tantalum, powder-metallurgy consolidation,

1.1.2 UNS Grade R05200—Unalloyed tantalum, vacuum melted,

1.1.3 UNS Grade R05252—Tantalum + 2.5 % tungsten alloy, vacuum melted.

1.1.4 UNS Grade R05255—Tantalum + 10 % tungsten alloy, vacuum melted.

1.1.5 UNS Grade R05240—Tantalum alloy, 60 % tantalum, 40 % niobium, electron-beam furnace or vacuum arc melt, or both.

ASTM B708 –Standard Specification for Tantalum and Tantalum Alloys – Plate, Sheet and Strip

11. Scope Active Standard ASTM B708

1.This specification covers unalloyed and alloyed tantalum plate, sheet, and strip as follows.

1.1.1 R05200, unalloyed tantalum, electron-beam furnace or vacuum-arc melt, or both,

1.1.2 R05400, unalloyed tantalum, powder-metallurgy consolidation,

1.1.3 R05255, tantalum alloy, 90 % tantalum, 10 % tungsten, electron-beam furnace of vacuum-arc melt, or both,

1.1.4 R05252, tantalum alloy, 97.5 % tantalum, 2.5 % tungsten, electron-beam furnace or vacuum-arc melt, or both, and

1.1.5 R05240, tantalum alloy, 60 % tantalum, 40 % niobium, electron-beam furnace or vacuum-arc melt.

ASTM B364 – Standard Specification for Tantalum and Tantalum Alloy Ingots

11. Scope Active Standard ASTM B364

1.1 This specification covers unalloyed and alloyed tantalum ingots prepared by vacuum-arc melting, electron-beam melting, or powder-metallurgy consolidation to produce consolidated metal for processing to various mill shapes.

1.2. The materials covered by this specification are:

1.2.1 R05200, unalloyed tantalum, electron-beam furnace or vacuum-arc melt, or both,

1.2.2 R05400, unalloyed tantalum, powder-metallurgy consolidation,

1.2.3 R05255, tantalum alloy, 90 % tantalum 10 % tungsten, electron-beam furnace or vacuum-arc melt, or both,

1.2.4 R05252, tantalum alloy, 97.5 % tantalum 2.5 % tungsten, electron-beam furnace or vacuum-arc melt, or both, and,

1.2.5 R05240 tantalum alloy, 60 % tantalum 40 % columbium, electron-beam furnace or vacuum-arc melt, or both.

ASTM F560 – Standard Specification for Unalloyed Tantalum for Surgical Implant Applications (UNS R05200, UNS R05400)

This are brief summary of the referenced standard for customer reference only. It is informational only not an official reference from Elite Material Solutions Limited. It should be used for preliminary reference only and no other purpose

Atomic Number

73

Atomic Mass

180.95

Melting Point

2 996 °C / 3 269 K

Boiling Point

6 100 °C / 6 373 K

Density at 20 °C

16.60 [g/cm3]

Crystal Structure

body-centred cubic

Vapour Pressure

at 1 800 °C

5 • 10-8 [Pa]

at 2 200 °C

7 • 10-5 [Pa]

Hardness at 20 °C (293 K)

deformed

120 – 220 [HV10]

recrystallized

80 – 125 [HV10]

Coefficient of Linear Thermal Expansion at 20 °C (293 K)

6.4 • 10-6 [m/(m•K)]

Modulus of Elasticity at 20 °C (293 K)

186 [GPa]

Recrystallization temperature (annealing time: 1 hour)

900 – 1 450 °C

Superconductive (transition temperature)

< -268.65 °C / < 4.5 K

Electrical Conductivity at 20 °C (293 K)

8 • 10-6 [1/(Ω•m)]

Thermal Conductivity at 20 °C (293 K)

54 [W/(m•K)]

Corrosion Resistance of Tantalum

Water

Hot Water < 150 °C

Resistant

Organic Acids

Acetic Acid < 100 % up to 150 °C

Resistant

Oxalic Acid < 10 % up to 100 °C

Resistant

Lactic Acid < 85 % up to 150 °C

Resistant

Tartaric Acid < 20 % up to 150 °C

Resistant

Inorganic Acids

Hydrochloric Acid < 30 % up to 190 °C

Resistant

Sulphuric Acid < 98 % up to 190 °C

Resistant

Nitric Acid < 65 % up to 190 °C

Resistant

Hydrofluoric Acid < 60 %

Not Resistant

Phosphoric Acid < 85 % up to 150 °C

Resistant

Non-Metals

Fluorine

Resistant

Chlorine < 150 °C

Resistant

Bromine < 150 °C

Resistant

Iodine < 150 °C

Resistant

Sulphur < 150 °C

Resistant

Phosphorous < 150 °C

Resistant

Boron < 1 000 °C

Resistant

Saline

Calcium Chloride < 150 °C

Resistant

Magnesium Sulphate < 150 °C

Resistant

Ferric Chloride < 150 °C

Resistant

Potassium Chlorate < 150 °C

Resistant

Ammonium Chloride < 150 °C

Resistant

Sodium Nitrate < 150 °C

Resistant

Body Fluids < 150 °C

Resistant

Tin Chloride < 150 °C

Resistant

Corrosion Resistance Against Metal (Melts)

Aluminium

Not Resistant

Lithium

Resistant at < 1 000 °C

Beryllium

Not Resistant

Magnesium

Resistant at < 1 150 °C

Lead

Resistant at < 1 000 °C

Sodium

Resistant at < 1 000 °C

Cadmium

Resistant at < 500 °C

Nickel

Not Resistant

Caesium

Resistant at < 980 °C

Mercury

Resistant at < 600 °C

Iron

Not Resistant

Silver

Resistant at < 1 200 °C

Gallium

Resistant at < 450 °C

Bismuth

Resistant at < 900 °C

Potassium

Resistant at < 1 000 °C

Zinc

Resistant at < 500 °C

Copper

Resistant at < 1 300 °C

Tin

Resistant at < 260 °C

Cobalt

Not Resistant

Corrosion Resistance Against Gases

Oxygen and Air

Resistant at < 300 °C

Water vapour

Resistant at < 200 °C

Hydrogen

Resistant at < 340 °C

Carbon Monoxide

Resistant at < 1 100 °C

Nitrogen

Resistant at <700 °C

Carbon Dioxide

Resistant at < 500 °C

Hydrocarbons

Resistant at < 800 °C

Noble gases

Resistant

Ammonia

Resistant at < 700 °C

Corrosion Resistance against Heat-Resistant materials

Aluminium oxide

Resistant at < 1 900 °C

Silicon nitride

Resistant at < 700 °C

Beryllium oxide

Resistant at < 1 600 °C

Thorium oxide

Resistant at < 1 900 °C

Molybdenum

Resistant

Hex. boron nitride

Resistant at < 700 °C

Graphite

Resistant at < 1 000 °C

The listed limit temperatures apply in a vacuum. If a protective gas is used, these temperatures are approximately 100 to 200 °C lower.

· Take careful account of the behavior of Tantalum in contact with the other materials present in the system, especially when working at high temperatures.

· Tantalum does not react with noble gases. As a result, high purity noble gases can be used as protective gases.

· With increasing temperature, Tantalum reacts very strongly with Oxygen or air and may absorb large quantities of Hydrogen and Nitrogen. This causes the material to become brittle. Annealing Tantalum in a high vacuum will get rid of these impurities. Hydrogen is eliminated at 800 °C and Nitrogen as of 1 700 °C.

· Measures against hydrogen embrittlement are as follows:

· Electrical insulation of the metals

· Positive polarization of the metals (approx. + 15 V)

· Addition of oxidants to the solution

· Use of formed metal surfaces

· Electrical contact with a more noble metal (e.g. Pt, Au, Pd, Rh, Ru)

· In high-temp furnaces, Tantalum may react with construction parts made of refractory oxides or graphite. Contact with graphite may cause Tantalum carbide and the embrittlement of the Tantalum.

All the above data is for reference only and should only be used in conjunction with approved sourced information and data, specification details correct at time of site update.

China Tungsten Flange Manufacturer www.steeljrv.com

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