Washington claims that China's export duties, export quotas and limitations placed on businesses that want to export raw materials have hurt US businesses.
The raw materials concerned in the dispute range from cobalt to copper and tin and China is facing a similar spat with the European Union.
The US first requested arbitration at the WTO last month, with the country's trade representative Michael Froman questioning China's commitment to the WTO's goal of establishing a level-playing field in global trade.
Froman's office has insisted that Chinese raw materials are crucial to sustaining key American industries.
Citing an example, the trade representative's office noted that Indium, used for the thin-film coating on flat-panel screens, helps drive a USD 10.1 billion (9.1 billion euros) computer equipment industry that employs 21,000 Americans.