Full definition
High-hardness steel plate (400-600 HBN) used as a sacrificial lining on surfaces subjected to severe sliding abrasion from bulk materials — truck bodies, chutes, hoppers, and bunker walls. Types: (1) Through-hardened — single-composition quenched and tempered steel; Hardox 400 (400 HBN, good impact + abrasion), Hardox 450 (450 HBN, standard mining), Hardox 500 (500 HBN, severe abrasion, reduced impact tolerance). (2) Chromium carbide overlay (CCO) — hard chrome carbide layer (55-65 HRC) welded onto a mild steel backing; excellent for low-angle sliding abrasion; limited impact resistance. (3) Tungsten carbide clad — highest hardness (1,200+ HV), for extreme abrasion in nozzles and guide vanes. (4) Composite ceramic-rubber tiles — for combined impact and sliding abrasion. Thickness: 6-100 mm. Installation: bolted, welded, or adhesive-bonded to the base structure. For high-impact zones (crusher discharge, primary chutes), rubber linings often outperform steel wear plates due to superior energy absorption — the choice between rubber and steel depends primarily on the wear mechanism (impact vs. sliding) and particle characteristics. Per manufacturer data sheets. Brands: SSAB (Hardox), Abraservice (Creusabro), Clifton Steel, and Alloy Steel International.