# Tungsten

## Tungsten Facts

Tungsten has a long history of use for filaments in the lamp industry. It offers exceptionally high strength at very high temperatures. In fact, it has the best high temperature strength of the four common refractory metals. Its high temperature strength, combined with its good electrical resistivity, have made it a popular choice for other applications in addition to filaments.

It is used for heating elements in vacuum furnaces that exceed the temperatures of molybdenum and tantalum as well as other heater applications. Tungsten has also gained wide acceptance as an essential material in electrical contacts, glass-to-metal seals, supports, and electrodes.

Technical Information

Tungsten is a greyish-white lustrous metal, which is a solid at room temperature. Tungsten has the highest melting point and lowest vapor pressure of all metals, and at temperatures over 1650°C has the highest tensile strength. It has excellent corrosion resistance and is attacked only slightly by most mineral acids.

**Atomic Weight**: 183.85

**Density**: 19.3 g/cc

**Melting Point**: 3695 K, 3422°C, 6192°F

**Boiling Point**: 6173 K, 5900°C, 10652°F

**Mass**:

Density at 20° C gm/cc - 19.3

Density at 20° C lb/in 3 - 0.697

**Thermal Properties**:

Melting Point, °C - 3410

Boiling Point, °C - 5900

Linear Coefficient of Expansion per °C - 4.9 x 10

^{-6}

Thermal Conductivity at 20°C, cal/cm2/cm°C/sec. - 0.40

Specific Heat, cal/g/°C; 20°C - 0.032

**Electrical Properties**:

Conductivity, % IACS - 31%

Resistivity, microhms-cm; 20°C - 5.5

Temperature Coefficient of Resistivity per °C (0-100°C) - 0.0046

**Mechanical Properties**:

Tensile Strength at room temperature, psi - 100,000-500,000

Tensile Strength-500°C psi - 75,000-200,000

Tensile Strength-1000°C psi - 50,000-75,000

**Young's Modulus of Elasticity; lb/in**:

^{2}Room Temperature - 59 x 10

^{6}

500°C - 55 x 10

^{6}

1000°C - 50 x 10

^{6}

**Spectral Emissivity**:

(Wave Length approx. 0.65) - 0.37 (900°C)

**Working Temperature**: 1700°C

**Recrystallizing Temp**: 1200-1400°C

**Stress Relieving Temp**: 1100°C

**Metallography**:

Etchant - HF-NH; F sol

Polishing - Alumina - Rouge to finish

Stock Supplies

These sizes are in stock, subject to prior sale. We also supply other sizes and alloys as well. See additional material information below.

sheet

- .001″ x 12″ Coil
- .002″ x 12″ Coil
- .003″ x 12″ x Coil
- .005″ x 12″ x 36″
- .005″ x 24″ x Coil
- .010″ x 24″ x Coil
- .015″ x 24″ x Coil
- .020″ x 24″ x Coil
- .025″ x 24″ x R/L
- .030″ x 24″ x R/L
- .040″ x 24″ x R/L
- .060″ x 24″ x R/L
- .080″ x 12″ x R/L
- .090″ x 12″ x R/L
- .125″ x 12″ x R/L
- .187″ x 12″ x R/L

plate

- .250″ x 12″ x R/L
- .280″ x 24″ x R/L
- .375″ x 12″ x R/L
- .500″ x 12″ x R/L
- .625″ x 12″ x R/L
- .750″ x 12″ x R/L
- 1.0″ x 12″ x R/L
- 1.125″ x 12″ x R/L
- 1.187″ x 12″ x R/L
- 1.250″ x 12″ x R/L
- 1.375″ x 12″ x R/L
- 1.500″ x 12″ x R/L
- 1.750″ x 12″ x R/L
- 2.0″ x 12″ x R/L

wire

- .001″ Dia x 100 ft
- .002″ Dia x 100 ft
- .003″ Dia x 100 ft
- .004″ Dia x 100 ft
- .004″ Dia x 10000 MTR
- .005″ Dia x 100 ft
- .006″ Dia x 100 ft
- .007″ Dia x 200 ft
- .008″ Dia x 1800 MTR
- .010″ Dia x 100 ft
- .015″ Dia x 100 ft
- .020″ Dia x 100 ft
- .030″ Dia x 100 ft

rod

- .040″ Dia x R/L
- .060″ Dia x R/L
- .080″ Dia x R/L
- .090″ Dia x R/L
- .125″ Dia x R/L
- .156″ Dia x R/L
- .187″ Dia x R/L
- .250″ Dia x R/L
- .312″ Dia x R/L
- .375″ Dia x R/L
- .625″ Dia x R/L
- .750″ Dia x R/L
- .875″ Dia x R/L
- 1.000″ Dia x R/L
- 1.250″ Dia x R/L
- 1.500″ Dia x R/L
- 2.000″ Dia x R/L

Material Information

- ASTM B760, ASTM F288 (ROD)
- ASTM Certifications upon request
- No cutting fee for custom lengths
- Custom Sizes Available
- Custom Stocking Plans Available

Helpful Links

- Size To Weight Calculator
- AWG No. To In/MM Wire Size Chart
- Tungsten MSDS