Creusabro Dual

Creusabro Dual is the Right Choice for Sliding Wear Conditions

Creusabro Dual is an incredibly innovative and advanced abrasive-resistant steel. Creusabro Dual’s high titanium content (0.6%) and oil quench heat treatment allows it to outperform traditional water quenched steels (500HB – 550HB), hardfacing plates and hard-cast parts in severe sliding wear conditions.

Creusabro Dual is the perfect choice for extreme environments where severe sliding wear is inevitable. Its oil quench heat treatment allows for reduced residual stress within the plate, which is important for extreme wear conditions.

Extra hard primary titanium carbides synthesized inside of the steel matrix allows for phenomenal extra wear resistance and severe abrasion resistance making Creusabro Dual the superior choice for your toughest jobs.

Standards

CMnNiCrMoSTi
≈0.40≈1.30≈0.45≈0.70≤0.340≤0.002≈0.60
Hardness (HB)Y.S. 0.2 MPa (ksi)UTS MPa (ksi)El 5.65 %KCVL -20°C (-4°F) J (ft.lb)E GPa
4801200 (174)1630 (236)1018 (13)205

Hardness = 45O/49O HB (typical value)

Metallurgical Concept

Wear resistance depends not only on the hardness of the steel at delivered state, but also on other properties, such as crack resistance, work hardening effect, strength, ductility, softening resistance, etc.

The performance in service of given wear resistant steel is strongly influenced by the microstructure obtained after thermal processing.

In the case of Creusabro Dual, a significant improvement of the wear resistance in service is mainly due to the following properties:

TRIP Effect (Transformation Induced by Plasticity)

As its initial structure not fully martensite (a mix of martensite, bainite and retained austenite), Creusabro Dual has the ability to work-harden when submitted to local plastic deformation in service. Plastic deformation induces a surface hardening phenomenon by transformation of retained austenite into fresh and very hard martensite while the material remains ductile underneath, making it most effective to withstand both abrasion and heavy impact in service.

In addition, the super ductility of the retained austenite contributes to improve the lifetime in service by allowing larger micro shearing and thus delays the ultimate tearing of metal particles from the surface of the material exposed to the abrasive.

Titanium carbides

The extreme abrasion resistance versus the conventional wear resistant steels (500H8, 550H8…) is gained by the presence of the primary titanium carbides which are precipitated during the first stage of the solidification (already present within the semi-products, slab or ingot, before rolling and heat treatment). These titanium carbides exhibit an average hardness of 3000HV (Vickers hardness) and therefore create numerous hard spots in the steel matrix like crushed gravel in concrete.

Properties at High Temperature

Chemical composition of Creusabro Dual, and specially chromium, molybdenum and huge titanium contents, give a high softening resistance to the material. This property allows using Creusabro Dual in hot service conditions, at a maximum of 450°C (840°F) while conventional 500 HB water quenched steels are limited to 250°C (480°F).

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