In modern mining operations, the reliability of every component defines productivity. From the largest dump trucks to the smallest wear plates, the key to cost efficiency lies in minimizing unplanned downtime and extending the life of critical parts.
At the heart of this effort are bucket lips — the interface between the ground and the machine. They endure constant impact, sliding abrasion, and cyclic stress. Their degradation not only affects bucket capacity and performance but also increases fuel consumption and maintenance costs.

To overcome these challenges, engineers around the world have turned to a material that has redefined the concept of wear resistance: Hardox® wear steel, produced by SSAB.

What makes Hardox® different

Hardox® is not just a hard steel — it is a tough, homogeneously hardened, high-strength material designed to resist both wear and structural fatigue.
Unlike conventional steels that lose toughness as hardness increases, Hardox® maintains a unique balance: high surface hardness combined with exceptional impact resistance.

Each grade — Hardox® 450, 500 TUF, and 550 — is engineered for specific operating conditions:

• Hardox® 450 offers excellent weldability and formability for structural wear parts.
• Hardox® 500 TUF provides a superior combination of hardness (500 HBW) and toughness, resisting cracking under impact.
• Hardox® 550 delivers maximum wear life for static or heavy-abrasion components such as bucket lips and shrouds.

The key lies in SSAB’s controlled production process: vacuum-degassed clean steel, precise alloying, and uniform quenching. The result is a consistent hardness through the entire thickness — meaning the material wears evenly instead of delaminating or chipping.

The impact of Hardox® on bucket lip performance

In mining, the lip of an LHD bucket or front loader is one of the most punished areas. It absorbs the force of penetration, carries abrasive material, and suffers frictional wear during dumping.
When made of ordinary steel, the lip wears rapidly and loses its sharpness, increasing digging resistance and energy consumption.

Using Hardox® for bucket lips changes that dynamic entirely:

1. Longer service life: Field studies show that Hardox® can extend wear life by up to 2–3 times compared to conventional quenched and tempered steels.
   Its uniform hardness means that the material doesn’t just wear slower — it wears evenly, maintaining its profile and functionality for longer periods.
2. Improved penetration and lower fuel consumption: A sharper and more consistent lip profile requires less breakout force from the loader.
   This results in reduced hydraulic strain, lower fuel usage, and smoother bucket filling — all measurable savings over time.
3. Better weldability and repair efficiency: Despite its hardness, Hardox® maintains excellent weldability.
   Using proper preheating and consumables, maintenance teams can easily integrate it into welded or bolt-on GET systems like Curakit™, allowing for precision repairs and modular replacements.
4. Resistance to cracking and deformation: Thanks to its refined microstructure and purity, Hardox® absorbs impact energy without brittle fracture — a crucial property in underground environments where rocks, shotcrete, and impact loading are constant.

Hardox® + Curakit®: a proven combination

At Curakit™, we harness the mechanical advantages of Hardox® to develop bolt-on wear protection systems for underground LHD buckets.
Each component — from lips and corners to side shrouds — is precision-machined to fit securely and maintain the structural integrity of the bucket.

The benefits of this combination are tangible:

• 70% longer component life, reducing replacement frequency.
• Fewer shutdowns for maintenance.
• Reduced material waste, contributing to sustainability goals.

Curakit™’s engineering process integrates SSAB’s material data, field testing, and stress modeling to select the optimal Hardox® grade for each application. This ensures that every part not only lasts longer but also performs consistently throughout its wear cycle.

A step toward sustainable mining

Durability is no longer just a performance metric — it’s a sustainability goal.
By extending wear life, mines consume less steel, energy, and transport for replacements. Each tonne of Hardox® installed reduces the environmental footprint of maintenance, aligning with modern ESG objectives.

Hardox® steels are produced in SSAB’s fossil-free steel initiative, which aims to eliminate CO₂ emissions from steelmaking.
When combined with Curakit™’s efficient bolt-on design, the result is a sustainable, high-performance wear system for the next generation of mining operations.

Conclusion:

Hardox® steel has transformed the way mining companies approach wear protection.
In Curakit™ systems, it means longer life, less downtime, and a measurable return on every hour of operation.