Tungsten copper rod impact toughness reflects the resistance to external impact load and generally represented by ak or Ak, the units of J/cm2 and J (joule).
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The practical significance of impact toughness indicator is to reveal the brittle tendency of material. According to the temperature of impact test, it can be divided into three types, room temperature, low temperature and high temperature impact test; and according to the gap shape it also can be divided into V-shaped and U-shaped.