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H.C. Starck NRC® 4N (UNS R05200) Electron Beam Melted Tantalum

Category Metal , Nonferrous Metal , Refractory Metal , Pure Element
Manufacturer H.C. Starck
Trade Name NRC®
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF H.C. Starck NRC® 4N (UNS R05200) Electron Beam Melted Tantalum.pdf
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Material Notes:
Applications: NRC® ETA Tantalum metal products are used where purity and or ductility of the tantalum metal is more important than strength or grain size. Consequently, their primary applications are in sputtering, nickel based superalloys, explosion bonding of liners for corrosion resistance, medical, and ordnance applications All grades meet ASTM requirements.Forms Available: Sheet, Plate, Tube, Rod, Wire and Bar.Typical Purity: Purity refers to 100% minus total metallic content only, gases are omitted from the calculation. Metallic impurities are measured by GDMS, gases by Leco.Metallurgical Characteristics: Material is single-phase tantalum. Stress relieve at 1500°F, re-crystallize at 1900°F - 2100°F.Information provided by H.C. Starck.
Physical Properties Metric English Comments
Specific Gravity 16.6 g/cc
16.6 g/cc
Mechanical Properties Metric English Comments
Hardness, Rockwell B 25 - 65
25 - 65
hardness as annealed, typical
Hardness, Vickers 80 - 120
80 - 120
hardness as annealed, typical
Tensile Strength, Ultimate 241 - 310 MPa
35000 - 45000 psi
typical
Tensile Strength, Yield 138 - 207 MPa
20000 - 30000 psi
typical
Modulus of Elasticity 186 GPa
27000 ksi
Thermal Properties Metric English Comments
CTE, linear 6.48 µm/m-°C

@Temperature 20.0 - 500 °C
 3.60 µin/in-°F

@Temperature 68.0 - 932 °F
Specific Heat Capacity 0.141 J/g-°C

@Temperature 100 °C
 0.0336 BTU/lb-°F

@Temperature 212 °F
Thermal Conductivity 55.3 W/m-K

@Temperature 20.0 - 100 °C
 384 BTU-in/hr-ft²-°F

@Temperature 68.0 - 212 °F
Melting Point 2996 °C
5425 °F
Component Elements Properties Metric English Comments
Aluminum, Al <= 0.00010 %
<= 0.00010 %
Cadmium, Cd <= 0.00010 %
<= 0.00010 %
Calcium, Ca <= 0.00010 %
<= 0.00010 %
Carbon, C <= 0.0040 %
<= 0.0040 %
Chlorine, Cl <= 0.00010 %
<= 0.00010 %
Chromium, Cr <= 0.00010 %
<= 0.00010 %
Cobalt, Co <= 0.00010 %
<= 0.00010 %
Copper, Cu <= 0.00010 %
<= 0.00010 %
Hafnium, Hf <= 0.00010 %
<= 0.00010 %
Hydrogen, H <= 0.0010 %
<= 0.0010 %
Iron, Fe <= 0.00010 %
<= 0.00010 %
Lead, Pb <= 0.00010 %
<= 0.00010 %
Lithium, Li <= 0.00010 %
<= 0.00010 %
Magnesium, Mg <= 0.00010 %
<= 0.00010 %
Manganese, Mn <= 0.00010 %
<= 0.00010 %
Molybdenum, Mo <= 0.0030 %
<= 0.0030 %
Nickel, Ni <= 0.00010 %
<= 0.00010 %
Niobium, Nb (Columbium, Cb) <= 0.0080 %
<= 0.0080 %
Nitrogen, N <= 0.0040 %
<= 0.0040 %
Other, each <= 0.00010 %
<= 0.00010 %
Oxygen, O <= 0.010 %
<= 0.010 %
Potassium, K <= 0.00010 %
<= 0.00010 %
Silicon, Si <= 0.00010 %
<= 0.00010 %
Sodium, Na <= 0.00010 %
<= 0.00010 %
Sulfur, S <= 0.00010 %
<= 0.00010 %
Tantalum, Ta >= 99.99 %
>= 99.99 %
Balance
Thorium, Th <= 5.0e-7 %
<= 5.0e-7 %
Tin, Sn <= 0.00010 %
<= 0.00010 %
Titanium, Ti <= 0.00010 %
<= 0.00010 %
Tungsten, W <= 0.0080 %
<= 0.0080 %
Uranium, U <= 5.0e-7 %
<= 5.0e-7 %
Vanadium, V <= 0.00010 %
<= 0.00010 %
Yttrium, Y <= 0.00010 %
<= 0.00010 %
Zinc, Zn <= 0.00010 %
<= 0.00010 %
Zirconium, Zr <= 0.00010 %
<= 0.00010 %
Electrical Properties Metric English Comments
Volume Resistivity 0.0000147 ohm-cm

@Temperature 0.000 - 100 °C
 0.0000147 ohm-cm

@Temperature 32.0 - 212 °F
Chemical Properties Metric English Comments
Atomic Mass 180.95
180.95
Atomic Number 73
73
Thermal Neutron Cross Section 21.3 barns/atom
21.3 barns/atom
Descriptive Properties Value Comments
Total Metallic Content <0.01%
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