Hardox Steel

A major material recycling facility operating high-throughput industrial shredders encountered recurring maintenance bottlenecks. The equipment’s internal wear liners, originally fabricated from standard mild steel, degraded rapidly under relentless abrasive scrap and high-impact feeds. These mild steel liners required complete replacement approximately every two months.

The client approached us to engineer a longer-lasting wear solution. Frequent replacement intervals not only created substantial labor costs and replacement part expenses, but also caused disruptive plant downtime, bottlenecking overall recycling operations. The core objective was clear: extend component lifespan to align with scheduled plant overhaul cycles.

Shredder liner assembly
Generated concept; not a project photograph.

Working closely with the client and our fabrication partners, Novelty Structures performed a thorough failure mechanism assessment. Rather than performing a direct like-for-like replacement, our engineering team specified an upgrade to premium Hardox® 500 wear plate liners.

Hardox® 500 is an abrasion-resistant steel with a nominal hardness of 500 HBW, engineered to withstand intense sliding and moderate impact wear. We designed and custom-fabricated precision-fit replacement liner plates, establishing a baseline intermediate upgrade step to evaluate long-term wear patterns

In field operation under actual shredding conditions, the custom Hardox® 500 liners performed exceptionally well, lasting an impressive four months—exactly double the two-month lifespan achieved by the previous mild steel liners. This reported doubling of wear life provided immediate operational and financial benefits to the client.

A premier compaction equipment client specialising in heavy asphalt and soil rollers sought to enhance drum durability. Compaction equipment exposed to coarse, aggressive mineral aggregates experiences high surface abrasion. In oscillating rollers, a continuous grinding action occurs at the drum surface, making wear resistance a critical design priority.

However, implementing advanced wear-resistant steel in machine manufacturing presents a double challenge: the material must not only withstand brutal field conditions but must also remain fully workable within factory manufacturing parameters (bending, rolling, machining, and welding).

In collaboration with the client, we evaluated multiple advanced wear plate grades and selected Hardox® 450 (nominal hardness 450 HBW) for its optimal balance of high abrasion resistance, impact toughness, and outstanding workshop formability.

Our team established a dual-stage validation framework to de-risk the material transition:

Stage 1 — Workshop & Production Feasibility: First, a full-scale prototype vibrating compaction drum was manufactured to confirm that standard factory cold-forming, bending, welding, and surface machining equipment could process Hardox® 450 without excessive tool wear, micro-cracking, or dimensional distortion.

Stage 2 — In-Service Field Testing: Once production feasibility was established, the prototype roller drum was mounted on a heavy compaction machine and deployed directly into active road construction service with the client.

Compaction drum fabrication
Generated concept; not a project photograph.

Roller field trial
Generated concept; not a project photograph.

After completing 1,000 rigorous operating hours under demanding aggregate compaction conditions, the drum underwent comprehensive field inspection. Field observation confirmed that initial workshop machining grooves remained clearly visible across the entire surface of the Hardox® 450 drum shell.

The retention of machining grooves after 1,000 hours of aggressive aggregate grinding provided concrete field evidence of Hardox® 450’s exceptional resistance to surface wear, establishing full confidence for series production.

When introducing high-strength or wear-resistant steels (e.g., Hardox® 450) into curved or machined components, ALWAYS separate workshop production validation from field service validation.

In commercial transport and heavy earthmoving operations, vehicle gross weight limits strictly dictate maximum legal haul capacities. For weight-limited haulage vehicles, every kilogram of deadweight in the dump body directly reduces the net mass of material that can be legally transported.

A commercial transport manufacturing client approached Novelty Structures seeking to redesign a heavy-duty dump body. The existing design utilized conventional 10 mm thick structural steel plate (S355), resulting in an excessively heavy structure that limited total payload and increased fuel consumption during empty transit legs.

Dump body plate layout
Generated concept; not a project photograph.

Our engineering team designed a comprehensive structural redesign, substituting the heavy 10 mm structural steel plate with thinner, high-strength 8 & 6 mm Hardox® 450 wear plate. Because Hardox® 450 offers significantly higher yield strength, tensile strength, and hardness compared to standard mild steel, we trimmed plate thickness while maintaining superior resistance to impact denting, abrasive gouging, and structural deformation.

By implementing our thin-gauge Hardox® 450 design, the total mass of the dump body dropped from 3.4 tonnes to 2.6 tonnes. This achieved an immediate weight reduction of approximately 800 kg, directly converting deadweight into 800 kg of additional revenue-generating payload capacity per haul cycle.

Before specifying thinner Hardox® 450 plate, our engineers conduct rigorous structural analysis to evaluate key performance factors beyond wear resistance:

To ensure maximum reliability, structural integrity, and cost-effectiveness across all wear part installations, we adhere to standardized engineering guidelines during material selection, design, and routine maintenance.

An ultra-hard wear plate (such as Hardox® 550 or Hardox® 600) requires a rigid, flat, and well-maintained backing structure to perform reliably. High-hardness wear plates possess lower ductility; excessive bending or deflection in an unreinforced supporting shell can induce high residual stresses, leading to plate cracking or fastener failure.

Substructure Repair: Prior to releasing custom replacement liners for manufacture, inspect the supporting shell, frame, and mounting locations for thermal distortion, mechanical wear, or structural sagging. Resolve structural repairs before installation; upgrading material grade alone cannot compensate for a damaged mounting surface.

Section Size Optimization: Utilizing smaller, modular liner plate sections is a proven technique to mitigate structural deflection, accommodate thermal expansion, and minimize residual stress concentrations.

Modular liner access
Generated concept; not a project photograph.

An ultra-durable wear part can still create maintenance friction if fixings are unreachable or replacement plates cannot pass through existing access hatches. During design reviews, we enforce a 5-point maintenance checklist:

Selecting and fabricating the right wear-resistant material requires balancing workshop formability, structural design, maintenance access, and field wear mechanics. As demonstrated in these real-world case studies, our engineered solutions deliver quantifiable operational advantages—doubling component lifespan, eliminating unscheduled maintenance downtime, and increasing commercial payload capacity.

To consult with our engineering team on custom wear plate fabrication, structural redesign, or setting up a scientific wear trial, contact Novelty Structures.