It offers the same excellent hardness, yield strength and toughness as the renowned Hardox® 450 wear plate.
Unlike traditional materials that often excel only in one dimension, Hardox® HiAce delivers a combination of:
- Superior hardness and strength
- Resistance to corrosive wear
- High performance at high temperatures
- Workshop-friendly fabrication—no special infrastructure needed
Designed for real-world corrosive wear
High- or low-pH environments, combined with abrasion and impact, can create corrosive wear mechanisms that rapidly degrade conventional steels and damage your equipment.
Acids, sulfates, ammonia and salts can oxidize steel surfaces, accelerate wear rates and dramatically reduce service life. In these conditions, higher hardness alone is not enough.
Hardox® HiAce was developed to resist this complex degradation scenario. It provides the hardness needed for abrasion resistance while maintaining structural integrity in chemically aggressive environments.
Typical industries include:
- Waste collection
- Pulp and paper
- Wood handling
- Recycling
- Mining
- Agriculture
- Transportation
Why stainless steel falls short in corrosive wear environments
Stainless steels perform well in purely corrosive environments. But when abrasion and impact are introduced, their lower hardness limits service life.
According to internal testing at SSAB, Hardox® HiAce outperforms both stainless steel S304 and AR 400 steel in abrasive pH 4 conditions (see table below). “The main reason Hardox® HiAce outperforms stainless steel is its significantly higher hardness and dent resistance,” says Jonas Allebert, Senior Wear Specialist at SSAB.
| Material | Hardness HBW | Toughness (typical) | Relative service life in corrosive wear* | Relative cost* |
| Hardox® HiAce | 450 | 50 J at -40 °C | 1 | 1 |
| Stainless steel S304 | ≤201 | 60 J at -40 °C | 0.8 | 2 |
| AR 400 steel | 400 | 45 J at -40 °C | 0.5 | 1.7 |
*Tested in pH 4 abrasive conditions. Service life and cost figures are relative and based on real-world conditions at the time of writing. They should not be interpreted as guaranteed outcomes for specific applications.
In the corrosive wear tests, Hardox® HiAce achieved:
- Up to 20% longer service life than stainless steel
- No signs of pitting corrosion
- A more cost-efficient solution compared to stainless steel
Proven performance: 6-year garbage truck field study
SSAB monitored a garbage truck operated by the Swedish company Allmiljö, where Hardox® HiAce flooring replaced stainless steel S304.
Over six years and 106,000 km (65,865 miles):
- Only 40% wear was measured at the most exposed point
- No pitting corrosion was observed
- Floor integrity remained intact
“At this wear rate, the extended service life fully meets the operator’s requirements,” Allebert says.
Pitting corrosion is a common cause of leakage and costly maintenance in garbage trucks using traditional AR steels. Hardox® HiAce eliminated this risk while extending operational life.
Hardox® HiAce can take the heat—at least up to 400°C (752°F)
Equipment operating in elevated temperatures can experience damaging heat spikes that can negatively influence conventional AR steels. Where these steels rapidly lose hardness and wear resistance, Hardox® HiAce maintains its excellent properties and resistance to wear—up to at least 400°C (752°F). This gives you a dependable thermal buffer, long-term stability and reliable performance even during prolonged exposure.
Proven in extreme heat conditions at SSAB’s coke plant
After red-hot coke exits the coal furnaces at SSAB’s Oxelösund mill, it is water-cooled and discharged onto sliding ramps while still extremely hot—creating a challenging environment as the coke is mildly to moderately corrosive in addition to being abrasive.
When one of the ramps required new liner plates, Hardox® HiAce was chosen for its combined resistance to abrasion, impact, corrosion and heat. After months of operation, wear levels were even lower than anticipated.
Other high-temperature applications for Hardox® HiAce in steel mills include quenching wagons, cooling beds, slag tippers and furnace inlet scrapers.
Additional high-temperature applications include:
- Dryer drums and lifter plates in asphalt plants
- Clinker cooler plates and liner plates in cement plants
- Ash-handling equipment and chain conveyors in power plants
- Foundry scrapers and screeners
- Crusher liner plates and clinker hammers
