How is the grade of hard alloy named?

The grade of hard alloy is usually composed of letters and numbers, and its naming rules vary by country and region. In China, the grades of hard alloys are generally composed of "YG" (the first letter of the Chinese Pinyin for "hard" and "cobalt") and the percentage of average cobalt content. For example, YG8 represents an average WCo of 8%, while the rest are tungsten cobalt hard alloys made of tungsten carbide.

In addition, different types of hard alloys may have different brand names. For example, the representation rules for hard alloy grades used in cutting tools are mainly composed of category codes, group numbers, and subdivision numbers. Grades P, M, K, N, and S represent different hard alloy categories, each of which is further divided into different group numbers and subdivision numbers.