About Tungsten

History

The word, "tungsten" denotes a substance of high density, and is derived from the Swedish language, "tung", meaning "heavy," and "sten", meaning "stone." The chemical symbol for tungsten is W, which stands for wolfram. The name came from medieval German smelters, who found that tin ores containing tungsten had a much lower yield. It was said that the tungsten devoured the tin "like a wolf". Pure tungsten metal was first isolated by two Spanish chemists, José and Fausto de Elhuyar in 1783.

General Information

Tungsten has the highest melting point of any metal, and at temperatures over 3410°C (6170°F), also has the highest tensile strength. It has excellent corrosion resistance and is only attacked slightly by most mineral acids. Tungsten is extremely environmentally friendly.

Our Tungsten can now also be plated.

Main Tungsten Properties

Atomic Number 74
Atomic Weight 183.86
Maximum Density @ 20°C (68°F) 19.3 g/cc; 0.697 lb/cu.in.
Melting Point 3410°C (6170°F)
Linear Coefficient of Expansion 4.3 x 10E-6°C
Thermal Conductivity @ 20°C 0.40 cal/cm/°C/sec
Specific Heat @ 20°C 0.032 cal/g/°C
Electrical Conductivity 31% IACS
Tensile Strength @ Room Temp. 100,000 - 500,000 psi
Tensile Strength @ 500°C (932°F) 75,000 - 194,000 psi
Tensile Strength @ 1000°C (1832°F) 50,000 - 75,000 psi
Poisson's Ratio 0.284
Hardness (Mineral) 7.5
Hardness (Vickers) 3430
Hardness (Brinell) 2570

Click here for Tungsten Heavy Powder's Material Data Safety Sheet.

Tungsten Alloy Properties & Classes

Tungsten
Alloy
Density
(g/cc)
Tensile Strength
(KSI)
Elongation
(%)
Hardness
(Rc)
ASTM B777-07(2013)
Tungsten Nickel Iron Alloys
   85W
10.5Ni
  4.5Fe
15.8 - 16.0105 - 14520 - 3320 - 30 
90W
  7Ni
  3Fe
16.9 - 17.1105 - 14520 - 3324 - 32Class 1
90W
  6Ni
  4Fe
16.7 - 17.0105 - 14520 - 3324 - 32Class 1
91W
  6Ni
  3Fe
17.1 - 17.3105 - 14515 - 2825 - 30Class 1
92W
  5Ni
  3Fe
17.3 - 17.5105 - 14518 - 2825 - 30Class 2
92.5W
    5Ni
  2.5Fe
17.4 - 17.6105 - 14525 - 3025 - 30Class 2
93W
  4Ni
  3Fe
17.5 - 17.6105 - 14515 - 2526 - 30Class 2
  93W
4.9Ni
 2.1Fe
17.5 - 17.6105 - 14515 - 2526 - 30Class 2
93W
  5Ni
  2Fe
17.5 - 17.6105 - 14515 - 2526 - 30Class 2
95W
  3Ni
  2Fe
17.9 - 18.1105 - 1358 - 1525 - 35Class 3
  95W
3.5Ni
 1.5Fe
17.9 - 18.1105 - 1358 - 1525 - 35Class 3
96W
  3Ni
  1Fe
18.2 - 18.390 - 1206 - 1030 - 35Class 3
97W
  2Ni
  1Fe
18.4 - 18.590 - 1208 - 1430 - 35Class 4
98W
  1Ni
  1Fe
18.4 - 18.675 - 1205 - 1030 - 35Class 4
Tungsten Nickel Copper Alloys
90W
  6Ni
   4Cu
17.0 - 17.290 - 1204 - 825 - 35Class 1
93W
  5Ni
   2Cu
17.5 - 17.675 - 903 - 525 - 35Class 2