California Fine Wire is a manufacturer of many types of Thermocouple Wires. We supply the materials below in fine wire and ultra fine wire sizes.
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Thermocouple Fine and Ultra Fine Wires

Alumel Type K Thermocouple (TC) Wire
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Thermocouple Fine and Ultra Fine Wires

Chromel P Type E Thermocouple (TC) Wire
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Thermocouple Fine and Ultra Fine Wires

Chromel P Type K Thermocouple (TC) Wire
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Thermocouple Fine and Ultra Fine Wires

Constantan Type E Thermocouple (TC) Wire
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Thermocouple Fine and Ultra Fine Wires

Constantan Type J Thermocouple (TC) Wire
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Brands N/A California Fine Wire Co.
Specific Resistance N/A 177.000 Ohm·cm/ft N/A 425.000 Ohm·cm/ft N/A 425.000 Ohm·cm/ft N/A 294.000 Ohm·cm/ft N/A 294.000 Ohm·cm/ft
Specific Resistivity N/A 29.42 µOhm·cm²/cm N/A 70.65 µOhm·cm²/cm N/A 70.65 µOhm·cm²/cm N/A 48.87 µOhm·cm²/cm N/A 48.87 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 0.00188 Ohm/Ohm/ºC N/A 0.000324 Ohm/Ohm/ºC N/A 0.00032 Ohm/Ohm/ºC N/A 0.00001 Ohm/Ohm/ºC N/A 0.00001 Ohm/Ohm/ºC
Thermal Electromotive Force (EMF) Vs Copper N/A -0.014
Density N/A 8.58 g/cm³ N/A 8.73 g/cm³ N/A 8.72 g/cm³ N/A 8.86 g/cm³ N/A 8.86 g/cm³
Youngs Modulus N/A
Specific Heat at 20 Degree Celsius (ºC) Temperature N/A 0.125 cal/g N/A 0.107 cal/g N/A 0.107 cal/g N/A 0.094 cal/g N/A 0.094 cal/g
Thermal Conductivity N/A 0.297000 W/cm/ºC N/A 0.192000 W/cm/ºC N/A 0.192000 W/cm/ºC N/A 0.218000 W/cm/ºC N/A 0.218000 W/cm/ºC
Coefficient of Linear Expansion N/A 12 x 10-6 in/in ºC N/A 7.3 x 10-6 in/in ºC N/A 13.1 x 10-6 in/in ºC N/A 8.3 x 10-6 in/in ºC N/A 8.3 x 10-6 in/in ºC
Melting Point N/A 1400.00 ºC N/A 1427.00 ºC N/A 1430.00 ºC N/A 1221.00 ºC N/A 1221.00 ºC
Industry Standards N/A American Society for Testing and Materials (ASTM) E-230
Wire N/A
Ribbon N/A
Square N/A
Insulated N/A
Plated N/A
Element N/A Aluminum (Al) Manganese (Mn) Nickel (Ni) N/A Chromium (Cr) Nickel (Ni) N/A Chromium (Cr) Nickel (Ni) N/A Copper (Cu) Nickel (Ni) N/A Copper (Cu) Nickel (Ni)
Second Element N/A Aluminum (Al) Manganese (Mn) Nickel (Ni) N/A Chromium (Cr) Nickel (Ni) N/A Chromium (Cr) Nickel (Ni) N/A Copper (Cu) Nickel (Ni) N/A Copper (Cu) Nickel (Ni)
Nominal Aluminum (Al) Composition N/A 2.0000 % N/A N/A N/A N/A
Nominal Chromium (Cr) Composition N/A N/A 10.0000 % N/A 10.0000 % N/A N/A
Minimum Copper (Cu) Composition N/A
Nominal Copper (Cu) Composition N/A N/A N/A N/A 55.0000 % N/A 55.0000 %
Minimum Iron (Fe) Composition N/A
Nominal Manganese (Mn) Composition N/A 2.0000 % N/A N/A N/A N/A
Nominal Nickel (Ni) Composition N/A 95.0000 % N/A 90.0000 % N/A 90.0000 % N/A 45.0000 % N/A 45.0000 %
Hard Ultimate Tensile Strength (UTS) N/A 170000 psi N/A 95000 psi N/A 150000 psi N/A 60000 psi N/A 140000 psi
Annealed Ultimate Tensile Strength (UTS) N/A 85000 psi N/A N/A 95000 psi N/A N/A 60000 psi
Hard Yield Tensile Strength (YTS) N/A
Annealed Yield Tensile Strength (YTS) N/A
Note N/A All values may vary dependent on specific design and usage.
Magnetic N/A
Operating Temperature N/A 1260.00 ºC N/A 1093.00 ºC N/A 1260.00 ºC N/A 1093.00 ºC N/A 700.00 ºC