Creusabro® 8000: a high performance wear and impact resistant steel
Creusabro® 8000 is a high performance wear resistant steel, exhibiting a wear resistance 50% higher than conventional 500HB water quenched steel, combined with excellent weldability and very acceptable workability.
Rather than relying exclusively on a high hardness level, properties of Creusabro® 8000 are improved as a result of the combination of an enriched alloying content (chromium, nickel, molybdenum and titanium) and specific heat treatment procedures.
The moderate hardness of Creusabro® 8000 in the as delivered condition makes processing operations like cutting, machining and forming easier and far better than ordinary water quenched steels.
When in service, Creusabro® 8000 strongly improves its wear resistance by a surface hardening effect of about +70 HB under the action of local plastic deformations caused by impact with rocks or pressure by the abrasive particles.
Creusabro® 8000 is ideal for applications in mines and quarries, cement and steelmaking industries, public works and agricultural machinery. In the toughest industries such as mining and earth moving, the higher resistance to wear and impact abrasion translates into increased service life of wearparts and components made of Creusabro® 8000 against conventional water quenched steels. As a result, significant costs saving benefits are achieved to plant maintenance budgets.
The grade is suitable for all types of abrasion, sliding or impact, dry or wet environments, including operating temperatures up to 350-450°C.
- Creusabro® Unique, best, Proven
A high performance wear and impact resistant steel. Creusabro® 8000 is a high performance wear resistant steel, exhibiting a wear resistance 50% higher than conventional 500HB water quenched steel, combined with excellent weldability and very acceptable workability. Rather than relying exclusively on a high hardness level, properties of Creusabro® 8000 are improved as a result of the combination of an enriched alloying content (chromium, nickel and molybdenum) and specific heat treatment procedures such as oil quenching.
- The specific concept with controlled quenching rates used in the mill fabrication practice:
– develop a bainite-martensite mixed microstructure with retained austenite absorbing impact
– stimulate a fine dispersion of hard micro-alloyed carbides delaying cracking and surface peel off
– wear resistance in service is strongly improved by a surface hardening effect of +70 HB under the action of local plastic deformations. This is known as TRIP-effect.
- Longer service life by +50 to 100%
– Creusabro® 8000 outlast by 50 -100% classical 500HB, 550HB-class plates …
Alternatively, Creusabro® steels offer substantial weight savings and increased payload potential (lower thickness is required) for the same wear life as standard water quenched plates.
- Structural capacity within a wear plate Creusabro® has a guaranteed impact energy of min 32 J at -20°C. It offers the toughness and weldability necessary to perform not just as a wear liner, but potentially as a structural material.
– no residual stresses within the plate, thus no deformation during and after cutting, thanks to soft quenching process
– excellent flatness < 5 mm/m achieved without cold-deformation
– softer material in the as-delivery condition facilitate smooth and easy processing of complex parts at the workshop, without compromising on the wear resistance.
- Heat and wear resistance
Specific chemical composition and initial microstructure result in a high resistance to softening compared to conventional water quenched, which lose their hardness above 250°C.
– in-service temperature up to 450°C
– reduced Heat Affected Zone, e.g. after flame cutting or welding
– if required, Creusabro plates can be hot formed at without any further heat treatment.