According to 'GB/T 3648-2024 Ferrotungsten', ferrotungsten is divided into four grades: FeW80-A, FeW80-B, FeW80-C, and FeW70 according to the different tungsten and impurity contents. The tungsten content of FeW80 is 75-85%, and the tungsten content of FeW70 is 65-75%. Ferrotungsten is based on 70% tungsten content.
