Tantalum is a gray steel metal with low hardness which is related to Oxygen content. The Vickers hardness of ordinary pure Tantalum under annealing state is only 140HV. Its melting point is as high as 2996℃, ranking fifth after Carbon, Tungsten, Rhenium and Osmium in the elemental substance. Tantalum is ductile and can be drawn into wire and thin coil. Its coefficient of thermal expansion is very small, it expands by only 6.6 % for each degree Celsius rise. In addition, the tenacity is better than Copper. 

Tantalum also has excellent chemical properties and is highly resistant to corrosion. It does not react with hydrochloric acid, concentrated nitric acid and aqua regia under both hot and cold conditions. However, Tantalum can be corroded in hot concentrated sulfuric acid. Below 150℃, Tantalum will not be corroded by concentrated sulfuric acid and will react only above this temperature.

The characteristics of Tantalum make it widely used in many fields. Tantalum can be used to replace stainless steel in the equipment of making various inorganic acids, and its service life can be increased by dozens of times. In addition, Tantalum can take the place of Platinum, a precious metal, in chemical, electronic, electrical and other industries so that the cost is greatly reduced. Tantalum is made into capacitors for military equipment, and half of the world's tantalum production is used in the production of Tantalum capacitors.

Tantalum Tungsten alloys is an alloy composed of Tungsten element and Tantalum matrix. The Tantalum and Tungsten binary alloy is a continuous solid solution and is a solid solution reinforced alloy. With the increase of Tungsten content, the strength of the alloy increases while the ductility decreases. The commonly used Tantalum Tungsten alloys includes TA-2.5W, TA-7.5W, TA-10W and Tantalum alloys with high Tungsten content.

Tantalum alloys with 10% W (W)> is generally high Tungsten content Tantalum alloys. At present, the commonly used alloys are TA-12W, TA-13W and TA-15W. Tantalum alloys with high Tungsten content has higher creep strength and lower creep rate and is better candidates for heat-resistant components.