Tungsten, also known as wolfram, is a metal with many uses. It is commonly used to produce electrical wires and heating and electrical contacts, but is also used in welding, heavy metal alloys, heat sinks, turbine blades and as a substitute for lead in bullets. According to a US Geological Survey (USGS) report, world tungsten production reached 82,400 metric tons (MT) in 2014, an increase over 2013's 81,400 MT. Here's a brief overview of the 10 countries that produced the most tungsten last year. 1. ChinaMine production: 68,000 MT China is the largest producer of tungsten, accounting for about 84.5 percent of the world's total output. In 2014, the country produced 68,000 MT of tungsten, the same amount as the previous year. That's a lot of tungsten, but a recent report notes that the Asian nation's tungsten production may fall in the future as supply grows tighter. 2. Russia Mine production: 3,600 MT Russia produced much less tungsten than China in 2014, but still took second-place spot, putting out 3,600 MT of the metal. That's the same amount the country produced in 2013. MBendi Information Services states that in the past Russia has flooded the market with tungsten in order to drive the metal's price down. 3. CanadaMine production: 2,200 MT Canada saw an increase in tungsten output in 2014, producing 2,200 MT of the metal; that's compared to 2,130 MT in 2013. One of the country's main tungsten producers is North American Tungsten (TSXV:NTC) — in particular, its Northwest Territories-based Cantung mine, which is one of the largest operating tungsten mines outside China, is a significant producer. 4. VietnamMine production: 2,000 MT Vietnam also enjoyed increased tungsten production in 2014. The country bumped up its output to 2,000 MT from 1,660 MT the previous year.