Excavator buckets and backhoe buckets are traditionally made of 400 or 450 Brinell hardness steel or even softer steel. The development of Hardox® 500 Tuf wear steel enables the use of even harder steel in a large part of a excavator bucket. Hardox® 500 Tuf has a hardness of approximately 500 HBW. The higher strength enables thinner steel components and lighter buckets. This means the bucket can be used for heavier scoops and higher productivity, or on smaller machines. Higher hardness results in a longer service life, as shown in the graph. This guide gives examples and recommendations of how and where to use Hardox® wear plate.
Recommended steel: Hardox® 500 Tuf.
The shell plate will have a relatively high wear rate and will benefit from the high hardness and high yield strength that comes with Hardox® 500 Tuf. As the shell plate is a large component, it is an important candidate for weight saving. In most cases, Hardox® 500 Tuf enables a reduction in both thickness and weight, while prolonging the wear life.
Recommended steel: Hardox® 500 or Hardox® 450.
The side cutters are, like the cutting edge, heavily subjected to sliding wear under high pressure. In addition, to cut into the dug material, the side cutters also protect important structural parts. We recommend using Hardox® 500 or Hardox® 450 in these areas.
Recommended steel: Hardox® 500 or Hardox® 500 Tuf.
The lower side wear plates are exposed to very high wear. To protect the side plates and lower side edge area, we recommend Hardox® 500 or Hardox® 500 Tuf. We recommend the same thickness and steel grade as in the side plate, to optimize the material usage.
The information in this report is only applicable to SSAB’s products and should not be applied to any other products than original SSAB products.