Tungsten - Leading Edge Metals and Alloys | LEMA

Overview

Tungsten has the highest melting point of all metals and, at temperatures greater than 1650°C, the highest tensile strength. Its thermal expansion rate is similar to that of borosilicate glass and silicon. Tungsten’s good thermal and electrical conductivity make it an excellent choice for microprocessor applications. It is also used in electron emitters, heater coils, cathode ray tubes, electrical contacts and a variety of high-heat applications.
Properties

Technical Properties

of Tungsten

Tungsten Metal Properties

 Melting pointBoiling pointDensity Heat of fusionMolar heat capacityElectrical resistivityMagnetic ordering
Tungsten3695 K ​(3422 °C, ​6192 °F)6203 K ​(5930 °C, ​10706 °F)19.3 g/cm352.31 kJ/mol[3][4]24.27 J/(mol·K)52.8 nΩ·m (at 20 °Cparamagnetic[5]
Molybdenum 2896 K ​(2623 °C, ​4753 °F)4912 K ​(4639 °C, ​8382 °F)10.28 g/cm337.48 kJ/mol24.06 J/(mol·K)53.4 nΩ·m (at 20 °C)paramagnetic[4]
Titanium1941 K ​(1668 °C, ​3034 °F)3560 K ​(3287 °C, ​5949 °F)4.506 g/cm314.15 kJ/molxx420 nΩ·m (at 20 °C)paramagnetic
Zirconium2128 K ​(1855 °C, ​3371 °F)4650 K ​(4377 °C, ​7911 °F)6.52 g/cm314 kJ/mo25.36 J/(mol·K)421 nΩ·m (at 20 °C)paramagnetic[3]
Constantan1210 °C
Nickel1728 K ​(1455 °C, ​2651 °F)3003 K ​(2730 °C, ​4946 °F)8.908 g/cm317.48 kJ/mol26.07 J/(mol·K)69.3 nΩ·m (at 20 °C)ferromagnetic
Alumel1399 °Cxx8.61 g cm−3xxxxxxxx
Chromel1420 °C8.5 g cm−3xx0.706 µΩ mxx
Invar 361427°C, 2600°Fxx8055g cm 0.291xxxx495 ohm-cir mil/ftxx
Niobium2750 K ​(2477 °C, ​4491 °F)5017 K ​(4744 °C, ​8571 °F)8.57 g/cm330 kJ/mol24.60 J/(mol·K)152 nΩ·m (at 0 °C)paramagnetic
Rhenium3459 K ​(3186 °C, ​5767 °F)5903 K ​(5630 °C, ​10,170 °F)21.02 g/cm360.43 kJ/mol25.48 J/(mol·K)193 nΩ·m (at 20 °C)paramagnetic[2]
Tantalum3290 K ​(3017 °C, ​5463 °F)5731 K ​(5458 °C, ​9856 °F)16.69 g/cm336.57 kJ/mol25.36 J/(mol·K)131 nΩ·m (at 20 °C)paramagnetic[3]
Kovar1450 °C / 2640 °F8.35 g /cm300.49 Ω mm2 /cm
MuMetal2642°F [1450°C]xx 0.316 lb/in³ [8.74g/cm³]xxxx 60 μΩ​cmxx

Tungsten Alloy Properties

 HD 17HD 17BBHD 17DHD 17.5HD 17.7HD 18HD 18DHD 18.5
90% W 90% W90% W92.5% W93% W95% W95% W97% W
6% Ni6% Ni7% Ni5.25% NiBalance3.5% Ni3.5% Ni2.1% Ni
4% Cu4% Cu/Fe3% Fe2.25% FeNi Fe Mo1.5% Cu1.5% Fe.9% Fe
ASTM-B-777Class 1Class 1Class 2Super Chatter Free™Class 3Class 3Class 4
Density Gms/cc171717.517.7181818.5
Density Lbs/cu. in.0.6140.6140.6320.6390.650.650.668
Hardness Rockwell C24252630272728
Ultimate Tensile Strength (PSI)110000125000114000130000115000125000128000
Yield Strength .2% offset (PSI)90000880009000090000850009000085000
Elongation (% in 1")814121071210
Proportional Elastic Limit (PSI)45000520004600060000450004400045000
Modules of 40 x 10645 x 10647 x 10653 x 10645 x 10650 x 10653 x 106
Elasticity (PSI)
Coefficient of Thermal Expansion X 10-6/°C (20-400°C)5.44.84.64.54.44.64.5
Thermal Conductivity (CGS Units)0.230.180.20.270.330.260.3
Electrical Conductivity 14101314161317
(% IACS)
Magnetic PropertiesHD 17 = NIL Slightly Slightly Slightly NILSlightly Slightly 
HD 17BB = Slightly MagneticMagneticMagneticMagneticMagneticMagnetic
Industries

Industries

That Commonly Use Tungsten

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