Tantalum, Ta; Annealed

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Tantalum, Ta; Annealed
Categories:	Metal; Nonferrous Metal; Refractory Metal; Pure Element
Material Notes:	Annealed applies only to tensile and/or hardness values; other property values are typical of the element.
Vendors:	Eagle Alloys Corporation is a leading supplier of quality metals and alloys. Our staff prides itself on working fast, efficiently and courteously to get you the information you need. Call (800) 237-9012 or visit www.EagleAlloys.com. PLANSEE SE: Whether it's high temperatures, aggressive chemicals or extreme mechanical loading: PLANSEE supplies a suitable product solution in refractory metals or composite materials. As the world market leader in powder metallurgically produced high performance materials we combine outstanding materials knowledge with profound applications and technology know-how. Visit us at www.plansee.com. Click here to view all available suppliers for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
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Physical Properties	Original Value	Comments

Density	16.65 g/cc
Vapor Pressure	6.298e-9 bar @Temperature 2351 °C
	7.488e-9 bar @Temperature 2365 °C
	4.019e-8 bar @Temperature 2487 °C
	9.82e-8 bar @Temperature 2566 °C
	1.72e-7 bar @Temperature 2615 °C
	2.44e-7 bar @Temperature 2652 °C
	3.703e-7 bar @Temperature 2675 °C

Chemical Properties	Original Value	Comments
Atomic Mass	180.9479	1995
Atomic Number	73
Thermal Neutron Cross Section	21.3 barns/atom
X-ray Absorption Edge	0.18393 Å	K
	1.06084 Å	L_I
	1.11264 Å	L_II
	1.25427 Å	L_III
Electrode Potential	4.1 V
Electronegativity	1.5	Pauling
Ionic Radius	0.680 Å	Crystal Ionic Radius for Valence +5

Mechanical Properties	Original Value	Comments
Hardness, Brinell	95	Converted from Vickers for 3000 kg load/10 mm ball Brinell test.
Hardness, Rockwell A	35	Converted from Vickers.
Hardness, Rockwell B	51	Converted from Vickers.
Hardness, Vickers	100
Tensile Strength, Ultimate	450 MPa
Modulus of Elasticity	186 GPa
Poissons Ratio	0.35
Fatigue Strength	230 MPa @# of Cycles 5.00e+7	E-beam melted sample; rotating beam test.
Shear Modulus	69.0 GPa

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.0000125 ohm-cm
Magnetic Susceptibility	9.0e-7	cgs/g
Critical Magnetic Field Strength, Oersted	823 - 835
Critical Superconducting Temperature	4.43 - 4.51 K

Thermal Properties	Original Value	Comments
Heat of Fusion	170 J/g
CTE, linear	6.50 µm/m-°C @Temperature 20.0 °C
	6.60 µm/m-°C @Temperature 250 °C
	6.70 µm/m-°C @Temperature 500 °C
	6.96 µm/m-°C @Temperature 1000 °C
Specific Heat Capacity	0.153 J/g-°C
Thermal Conductivity	54.4 W/m-K @Temperature 20.0 °C
	56.1 W/m-K @Temperature -73.0 °C
	59.9 W/m-K @Temperature 127 °C
	66.6 W/m-K @Temperature 527 °C
	72.9 W/m-K @Temperature 927 °C
	77.0 W/m-K @Temperature 1327 °C
	80.8 W/m-K @Temperature 1727 °C
	83.7 W/m-K @Temperature 2127 °C
	85.8 W/m-K @Temperature 2527 °C
Melting Point	2996 °C
Boiling Point	5458 °C

Optical Properties	Original Value	Comments
Emissivity (0-1)	0.49	650 nm
	0.20 @Temperature 1460 °C	Total Hemispherical

Component Elements Properties	Original Value	Comments
Tantalum, Ta	100 %

Descriptive Properties
CAS Number	7440-22-7

References for this datasheet.

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