Recommended steel: Hardox 400 or Hardox 500.
The round bars will have a high wear rate compared to the side plates and will benefit from the high hardness and high yield strength that comes with Hardox 400 or 500. As normally are a lot of round bars, it is an important candidate for weight saving. In most cases, Hardox 400 and 500 enables a reduction in diameter and weight, while prolonging the wear life.