Tantalum

Do you need custom fasteners created with Tantalum? Since our inception, Elgin Fastener Group 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. %
Ta 100

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

Physical Properties Metric English Comments
Density 16.65 g/cc 0.602 lb/in³
Mechanical Properties
Hardness, Brinell 195 195 Converted from Vickers for 3000 kg load/10 mm ball Brinell test.
Hardness, Rockwell A 56 56 Converted from Vickers.
Hardness, Rockwell B 92 92 Converted from Vickers.
Hardness, Rockwell C 12 12 Converted from Vickers.
Hardness, Vickers 200 200
Tensile Strength, Ultimate 900 MPa 131000 psi
Modulus of Elasticity 186 GPa 27000 ksi
Poisson’s Ratio 0.35 0.35
Fatigue Strength 230 MPa 33400 psi 50,000,000 cycles. E-beam melted sample; rotating beam test.
Shear Modulus 69 GPa 10000 ksi
Electrical Properties
Electrical Resistivity 1.25e-005 ohm-cm 1.25e-005 ohm-cm
Magnetic Susceptibility 9e-007 9e-007 cgs/g
Critical Magnetic Field Strength, Oersted 823 – 835 823 – 835
Critical Superconducting Temperature 4.43 – 4.51 K 4.43 – 4.51 K
Thermal Properties
Heat of Fusion 170 J/g 73.1 BTU/lb
CTE, linear 20°C 6.5 µm/m-°C 3.61 µin/in-°F
CTE, linear 250°C 6.6 µm/m-°C 3.67 µin/in-°F
CTE, linear 500°C 6.7 µm/m-°C 3.72 µin/in-°F
CTE, linear 1000°C 6.96 µm/m-°C 3.87 µin/in-°F
Heat Capacity 0.153 J/g-°C 0.0366 BTU/lb-°F
Thermal Conductivity 54.4 W/m-K 378 BTU-in/hr-ft²-°F
Melting Point 2996 °C 5420 °F
Optical Properties
Emissivity (0-1) 0.2 0.2 total hemispherical at 1460°C
Emissivity (0-1) 0.49 0.49 650 nm
Descriptive Properties
CAS Number 7440-22-7

References are available for this material.