Specific weight of tungsten, properties, grades and value table

Tungsten is an element of the sixth group of the corresponding table of chemical elements. This element got its name from two German words - Wolf and Rahm, which together are translated as “wolf's foam”. Tungsten is a gray metal with light shades. It is characterized as the most refractory of all other types of metals.

Table of the specific weight of tungsten

Since tungsten is a complex material, it is not possible to calculate its specific weight independently in field conditions. These calculations are carried out in special chemical laboratories. However, the average specific weight of tungsten is known and is in the range from 19.1 to 19.3 g/cm³.

To simplify the calculations, below is a table with the values of such parameters as the weight of tungsten and its specific weight depending on the units of measurement.

Properties of tungsten

Tungsten is a transition metal of gray color with light shades. It is one of the most refractory metals. In appearance, it resembles steel. This element can be mechanically processed only when heated, and the heating mode depends on the type of processing.

If this type of metal is considered from the point of view of material application, then among its most notable characteristics it is worth highlighting:

• Excellent density, which is 19.3 g/cm³
• Very high melting temperature of about 3422 °C
• Acceptable electrical resistance of 5.5 μΩ*cm
• Low linear expansion coefficient of about 4.5 x 10^-6 1/°C
• Very high boiling temperature of tungsten, about 5555 °C
• Low vapor pressure and low evaporation rate at high temperatures
• Electrical conductivity three times lower than that of copper

Among the disadvantages limiting its use, tungsten has high brittleness at low temperatures, high density, and difficult machining. At high temperatures it also requires protection from oxidation; compact tungsten is generally resistant to many acids at room temperature.

Tungsten grades

Depending on additives and impurities, tungsten is commonly divided into grades:

• VCh grade tungsten. This grade is pure tungsten without the addition of any additives.
• VA grade tungsten. This is tungsten with aluminum and silicon-alkali additives to provide additional characteristics such as strength after annealing, an increased temperature range of primary recrystallization, and shape stability at high temperatures.
• VM grade tungsten. This is tungsten with thorium and silicon-alkali additives to provide additional characteristics such as strength after annealing and an increased temperature range of primary recrystallization.
• VT grade tungsten. This is tungsten with thorium, more precisely thorium oxide, in the form of an additive to increase emission properties.
• VI grade tungsten. This is tungsten with yttrium, more precisely yttrium oxide, in the form of an additive to increase emission properties.
• VL grade tungsten. This is tungsten with lanthanum, more precisely lanthanum oxide, in the form of an additive to increase emission properties.
• VR grade tungsten. This grade is an alloy of rhenium and tungsten used to increase ductility after high-temperature treatment, strength after annealing, the temperature range of primary recrystallization, and specific electrical resistance.
• VRN grade tungsten. This grade of tungsten does not contain additives, but allows the presence of impurities in an increased amount.
• MV grade tungsten. This grade is an alloy of tungsten and molybdenum used to provide increased strength after annealing while retaining ductility.