California Fine Wire manufactures several Refractory Metal Wires, including Tungsten Wire. We supply the materials below in fine wire and ultra fine wire sizes.
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Refractory Fine and Ultra Fine Wires

Molybdenum Wire
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Refractory Fine and Ultra Fine Wires

Tantalum R05200 Wire
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Refractory Fine and Ultra Fine Wires

Titanium 99% Wire
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Refractory Fine and Ultra Fine Wires

Tungsten 99.95% CS Wire
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Brands N/A California Fine Wire Co.
Specific Resistance N/A 31.000 Ohm·cm/ft N/A 74.600 Ohm·cm/ft N/A 252.000 Ohm·cm/ft N/A 33.000 Ohm·cm/ft
Specific Resistivity N/A 5.15 µOhm·cm²/cm N/A 12.4 µOhm·cm²/cm N/A 41.89 µOhm·cm²/cm N/A 5.49 µOhm·cm²/cm
Commercial Resistance Tolerance (On Sizes below 0.020) N/A 3.00 %
Temperature Coefficient of Resistance (0 to 100 Degree Celsius (ºC) Temperature) N/A 0.0033 Ohm/Ohm/ºC N/A 0.0038 Ohm/Ohm/ºC N/A 0.0034 Ohm/Ohm/ºC N/A 0.0045 Ohm/Ohm/ºC
Thermal Electromotive Force (EMF) Vs Copper N/A -0.014
Density N/A 10.21 g/cm³ N/A 16.61 g/cm³ N/A 4.51 g/cm³ N/A 19.29 g/cm³
Specific Heat at 20 Degree Celsius (ºC) Temperature N/A 0.064 cal/g N/A 0.033 cal/g N/A 0.082 cal/g N/A 0.033 cal/g
Thermal Conductivity N/A 1.397000 W/cm/ºC N/A 0.594000 W/cm/ºC N/A 0.15200 W/cm/ºC N/A 1.274000 W/cm/ºC
Coefficient of Linear Expansion N/A 5.4 x 10-6 in/in ºC N/A 6.5 x 10-6 in/in ºC N/A 8.5 x 10-6 in/in ºC N/A 4.0 x 10-6 in/in ºC
Melting Point N/A 2610.00 ºC N/A 2890.00 ºC N/A 1660.00 ºC N/A 3420.00 ºC
Industry Standards N/A N/A American Society for Testing and Materials (ASTM) B-365 N/A N/A
Wire N/A
Ribbon N/A
Square N/A
Insulated N/A
Plated N/A
Element N/A Molybdenum (Mo) N/A Tantalum (Ta) N/A Titanium (Ti) N/A Tungsten (W)
Second Element N/A Molybdenum (Mo) N/A Tantalum (Ta) N/A Titanium (Ti) N/A Tungsten (W)
Minimum Molybdenum (Mo) Composition N/A 99.9000 % N/A N/A N/A
Minimum Tantalum (Ta) Composition N/A N/A 99.9600 % N/A N/A
Minimum Titanium (Ti) Composition N/A N/A N/A 99.0000 % N/A
Nominal Tungsten (W) Composition N/A N/A N/A N/A 99.9500 %
Hard Ultimate Tensile Strength (UTS) N/A 320000 psi N/A 100000 psi N/A 90000 psi N/A 600000 psi
Annealed Ultimate Tensile Strength (UTS) N/A 100000 psi N/A 50000 psi N/A 75000 psi N/A 250000 psi
Hard Yield Tensile Strength (YTS) N/A 320000 psi N/A N/A N/A
Annealed Yield Tensile Strength (YTS) N/A 100000 psi N/A N/A N/A
Note N/A All values may vary dependent on specific design and usage.
Magnetic N/A
Operating Temperature N/A 200.00 ºC N/A 500.00 ºC N/A 500.00 ºC N/A 150.00 ºC