Riddle buckets, shaker buckets or skeleton buckets are great for processing and sorting of topsoil, hardcore and other mixed materials. The 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 the 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. 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 top plate will have a relatively lower wear rate compared to the bottom plate 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 Tuf.
The side plates are large components with relatively low wear. With Hardox® 500 Tuf, the thickness can be thinner and the weight lower, yet still offer longer service life.
Recommended steel: Hardox® 500 Tuf.
The number of tine plates or ribbed back slats varies dependent on function and design. The wear rate is high compared to the side plates and will benefit from the high hardness and high yield strength that comes with Hardox® 500 Tuf. With Hardox® 500 Tuf, the thickness can be thinner and the weight lower, yet still offer longer service life.
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.
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® 450.
The cutting edge is made to withstand high wear combined with high structural forces. To master both, we recommend using Hardox® 450.
Recommended steel: Strenx® 700.
Use of Strenx® 700 in the top beam makes it possible to reduce the thickness and save weight. The upgrading design rule of thumb indicates that it is possible to replace a 20 mm S355 with a 14 mm Strenx® 700.
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.
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