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Tantalum Material Property Data Sheet

Do you need custom fasteners created with Tantalum? Since our inception, Vegas Fastener Manufacturing has met every challenge of providing Quality, Timely, Cost-effective solutions for specialty fastener applications. Every product is built to your specifications, using your prints if necessary.

Below are the technical specifications of the Tantalum Bar Stock we have available to meet your needs.


Tantalum, Ta; Cold Worked

Subcategory: Metal; Nonferrous Metal; Pure Metallic Element

Component   Wt. %

Material Notes:
Cold worked applies only to tensile and/or hardness values; other property values are typical of the element.

Physical PropertiesMetricEnglishComments
Density16.65 g/cc0.602 lb/in 

Mechanical Properties
Hardness, Brinell195195 Converted from Vickers for 3000 kg load/10 mm ball Brinell test.
Hardness, Rockwell A5656 Converted from Vickers.
Hardness, Rockwell B9292 Converted from Vickers.
Hardness, Rockwell C1212 Converted from Vickers.
Hardness, Vickers200200 
Tensile Strength, Ultimate900 MPa131000 psi 
Modulus of Elasticity186 GPa27000 ksi 
Poisson's Ratio0.350.35 
Fatigue Strength230 MPa33400 psi 50,000,000 cycles. E-beam melted sample; rotating beam test.
Shear Modulus69 GPa10000 ksi 

Electrical Properties
Electrical Resistivity1.25e-005 ohm-cm1.25e-005 ohm-cm 
Magnetic Susceptibility9e-0079e-007 cgs/g
Critical Magnetic Field Strength, Oersted823 - 835823 - 835 
Critical Superconducting Temperature4.43 - 4.51 K4.43 - 4.51 K 

Thermal Properties
Heat of Fusion170 J/g73.1 BTU/lb 
CTE, linear 20C6.5 m/m-C3.61 in/in-F 
CTE, linear 250C6.6 m/m-C3.67 in/in-F 
CTE, linear 500C6.7 m/m-C3.72 in/in-F 
CTE, linear 1000C6.96 m/m-C3.87 in/in-F 
Heat Capacity0.153 J/g-C0.0366 BTU/lb-F 
Thermal Conductivity54.4 W/m-K378 BTU-in/hr-ft-F 
Melting Point2996 C5420 F 

Optical Properties
Emissivity (0-1)0.20.2 total hemispherical at 1460C
Emissivity (0-1)0.490.49 650 nm

Descriptive Properties
CAS Number7440-22-7 

References are available for this material.


This information is provided by MatWeb.com, The Online Materials Database and is reprinted with their permission.

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