We use yield strength 800MPa material to produce huge excavator long reach boom stick
it is important to make sure that huge long reach excavator work safe and strong in project, usually below 50ton excavator, we suggest general contruction equipment material Q345B to make long reach boom stick, yield strength of Q345B is around 420MPa, that is enough for small and medium excavator,
But for bigger than 50ton excavator, we recommend better quality steel, like Q690D whose yield strength reach around 800MPa that can guarantee boom arm not crack, general purpose material Q345B is not as good as Q690D performance,
