Evidence-first editorial standard
This guide separates observed facts, engineering assumptions and data that still require confirmation. It does not promise a universal service life or replace the exact product data and project specification.
Ceramic versus AR steel is not a simple hardness contest
Alumina ceramic offers a very hard contact surface and is attractive when particles slide or erode along a stable path. Abrasion-resistant steel is less hard but ductile, weldable and able to deform rather than fracture under many impact or structural loads. Because Mohs and Brinell are different test scales, their numbers should not be converted into a direct service-life prediction.
Start with the wear mechanism
Sliding abrasion dominates where material moves along a chute wall, hopper cone or pipe bore at a shallow angle. Impact dominates at the first contact point below a drop, on a deflector or at a crusher discharge. Erosion is driven by fine particles striking at velocity, especially around bends and turbulence. Corrosion, temperature, vibration and substrate movement can change the result even when the handled material is the same.
Ceramic is usually considered when the geometry is stable, the surface can be fully supported and the wear path is mainly sliding or erosive
Tile format, thickness, joint layout and retention matter: an exposed edge or unsupported void can fail before the ceramic face is worn. AR steel remains a strong candidate for high-energy impact, moving structures, field welding and locations where local deformation is safer than brittle fracture.
A hybrid lining can be useful, but it must follow the measured trajectory
A ductile impact plate or resilient composite can receive the first strike, with alumina placed downstream where the material begins to slide. The transition must protect ceramic edges and avoid creating a ledge that increases turbulence. Hybrid does not mean adding materials at random; it means assigning each zone a documented function.
For a defensible comparison, record material and particle size, bulk density or solids concentration, velocity or throughput, drop height, impact angle, temperature, moisture, chemistry, current liner thickness and observed failure location
Compare candidates on installed cost, expected outage time, mass, inspectability, repair method and verified performance in a similar duty. If comparable operating data is unavailable, use a controlled trial area and track thickness loss or replacement interval before making a plant-wide claim.