2019-06-13 09:24:15

Tungsten Carbide Physical property and Chemical property

  Tungsten Carbide is a compound of tungsten and carbon. The molecular formula is WC and the molecular weight is 195.85.

  It is a black hexagonal crystal with metallic luster and similar hardness to diamond. It is a good conductor for electricity and heat. Tungsten carbide is insoluble in water, hydrochloric acid and sulfuric acid, and soluble in mixed acid of nitric acid and hydrofluoric acid. Pure tungsten carbide is fragile. If a small amount of titanium, cobalt and other metals are added, the brittleness can be reduced. Tungsten carbide used as cutting tools for steel is often added with titanium carbide, tantalum carbide or their mixture to improve explosion resistance. The chemical properties of tungsten carbide are stable. Tungsten carbide powder is used in cemented carbide production materials.


English name: Tungsten Carbide

Chemical formula: WC

molecular weight: 195.85

CAS accession number: 12070-12-1

EINECS login number:  235-123-0

Melting point : 2870 C

Boiling poin: 6000 C

Water solubility: Insoluble in water

Density: 15.63 g/cm_

Appearance:  Black hexagonal crystal with metallic luster

Risk description : Avoid contact with skin and eyes, and do not inhale dust.

Hazardous Goods Transport Number: UN3178

Theoretical density: 15.63g/cm

Resistivity: 19.2 x 10-6Ω·m

MDL number : MFCD00011464de


Physical property:

Microhardness: 17 300 MPa

Elastic modulus: 710GPa

Compressive strength : 56MP

Thermal expansion coefficient: 6.9 x 10-6/K

It is a black hexagonal crystal. Soluble in mixed acid of nitric acid and hydrofluoric acid and aqua regia, insoluble in cold water.

Gray powder with metallic luster. It belongs to hexagonal system. It is very hard and has high elasticity (72700 kg/mm2).


Chemical property

Active oxidation begins when air temperature is above 500 C. It has weak antioxidant ability and strong acid resistance.

Chemical Reaction Formula: W + C = WC Note: Reaction at 1150 C.


It does not react with chlorine below 400 C; reacts strongly with fluorine at room temperature; and oxidizes to tungsten oxide when heated in air.


Langsun Carbide has all kinds of shapes and sizes of cemented carbide products including carbide rods, carbide plates, carbide rings, carbide bushings, carbide nozzles, carbide balls, valves and nonstandard carbide parts. We feel very pride that our tungsten carbide products are widely used in the following fields, Mechanical seals, oil and natural gas industry, New Energy, Military industry, Aerospace, Auto parts industry, Steel smelting, Coal mining, Chemical industry. More detail: www.ls-carbide.com