High-Density Tungsten Alloy, also known as “high-specific-gravity tungsten alloy,” is an alloy primarily composed of tungsten (with a tungsten content of 85–99%) and small amounts of elements such as nickel (Ni), copper (Cu), cobalt (Co), molybdenum (Mo), and chromium (Cr). Its density ranges from 16.5–18.75 g/cm³, more than twice that of steel (approximately 7.85 g/cm³). Depending on the alloy composition, it can be classified into series such as W-Ni-Fe (tungsten-nickel-iron), W-Ni-Cu (tungsten-nickel-copper), W-Cu (tungsten-copper), and W-Ag (tungsten-silver).

Tungsten contacts are electrical contact materials primarily composed of refractory metal tungsten and other metal elements such as copper or silver, exhibiting excellent thermal, mechanical, and electrical properties, and are widely used in the power sector. Based on their chemical composition, they can be classified into tungsten-copper (WCu) contacts and silver-tungsten (AgW) contacts. 

In today’s rapidly developing automotive industry, material innovation and application have been key drivers of progress. From traditional steel to the later emergence of aluminum alloys and carbon fiber, each introduction of a new material has brought a qualitative leap in automotive performance. Beyond aluminum alloys and carbon fiber, high-density tungsten alloy is also a critical material in the automotive sector. While it may still seem unfamiliar to the general public, in the eyes of engineers, tungsten alloy is becoming a "secret weapon" for solving specific technical challenges, thanks to its exceptional properties.

Like tungsten-silver (WAg) contacts, tungsten-copper (WCu) contacts are also a typical type of tungsten contact. Since both tungsten-silver and tungsten-copper contacts are products based on refractory metal tungsten, their physicochemical properties, production methods, and applications are fundamentally similar. It should be noted that the price of silver is generally higher than that of copper.