How does thickness affect the choice of Hardox grade?

Thicker plates of Hardox steel naturally become less tough due to the increased hardness. For example: Hardox 400 : Works well even in thicker sections. Hardox 500/600 : Recommended for thinner plates or where impact stresses are minimal.

How does Hardox 450 compare to Hardox 400?

Hardox 450 has higher wear resistance (450 HBW vs. 400 HBW) and is slightly harder, making it suitable for applications where components face higher levels of abrasion. Hardox 400, while slightly softer, offers better machinability and toughness, making it easier to fabricate and weld.

What is the difference between Hardox 500 and 600?

Hardox 500 : Balances wear resistance with moderate toughness, making it suitable for heavy-duty applications like crushers and mining buckets. Hardox 600 : Prioritizes extreme wear resistance at the cost of reduced toughness. It is ideal for environments with little to no impact stress but intense abrasion.

What are the welding requirements for Hardox grades?

Welding Hardox steel requires care, especially for higher hardness grades. Key guidelines include: Preheating : Required for grades 500 and above to reduce the risk of cracking. Controlled Cooling : Avoid rapid cooling after welding to maintain structural integrity. Matching Electrodes : Use electrodes or filler materials designed for AR steels. Avoid Overheating : Excessive heat can reduce hardness in the heat-affected zone (HAZ).

What are the typical applications for each grade?

Grade Applications Hardox 400 Dump truck bodies, conveyors, wear liners, bins, silos, chutes, and hoppers. Hardox 450 Loader buckets, cutting edges, crushers, containers, and concrete mixers. Hardox 500 Crushers, screens, wear plates, buckets for heavy-duty excavators. Hardox 550 Cement plants, coal chutes, sand slingers, and hammers. Hardox 600 Extreme abrasion environments like mining blades, extreme wear liners, and fans. Hardox HiTuf Structural applications, such as components for heavy machinery or bridges.

Which grade should I choose for my application?

Your choice depends on the application requirements: For moderate wear and impact : Hardox 400 or 450. For high wear with minimal impact : Hardox 500 or 550/600. For structural applications with high toughness needs : Hardox HiTuf.