Hardox® 450 and Hardox® 500 are wear-resistant steels with different hardness levels. The right choice depends on the material the part handles, the impact it receives, and how it will be fabricated.
What The Grade Numbers Mean
The numbers refer to nominal hardness on the Brinell scale, written as HBW. Hardness helps steel resist abrasion as material rubs across it. Toughness helps the steel resist cracking under impact.
A higher hardness number does not answer every design question. Thickness, loads, operating temperature, and bending or welding requirements also affect material selection.
When To Consider Hardox® 450
Hardox® 450 is used for formed and welded wear parts, including buckets, hoppers, chutes, and body panels. It combines abrasion resistance with toughness and fabrication properties suited to these applications.
Consider the shape of the part and the loads it carries, as well as how quickly its surfaces wear down.
When To Consider Hardox® 500
Hardox® 500 has a higher nominal hardness. It is used for screens, liners, and other wear parts exposed to severe abrasion. Impact loads and fabrication requirements still need to be assessed.
If an existing part wears out quickly, describe where it becomes thin and what material passes over it. A different grade may help, but changes to the part design or operating conditions may also be needed.
Where Hardox® 500 Tuf Fits
Hardox® 500 Tuf combines high hardness with guaranteed toughness and structural properties. It is used for load-bearing wear parts such as buckets and tipper bodies. Assess any proposed change in grade or plate thickness against the design requirements.
What To Send For Grade Selection
Send BSF:
- A drawing, sample, or clear photos of the part
- Dimensions and the current grade and thickness, if known
- The material it handles and whether it receives heavy impacts
- Photos showing worn areas, cracks, or deformation
- Any operating temperature or corrosion conditions
BSF can use these details to discuss the grade, thickness, and fabrication requirements. Check the applicable SSAB® technical documents before specifying the material.