E39 cast aluminium wheel cores
Proprietary E39 aluminium alloy, developed to outperform standard AlMg and AlSi alloys under the cyclic loads and thermal exposure of rollercoaster service.
Cast aluminium wheel cores with polyurethane tread
A rollercoaster wheel consists of a metal wheel core with a polyurethane tread bonded around it — EURAD supplies the cast aluminium wheel core, which is periodically re-treaded in service. EURAD works with specialized partners for the re-treading. Designed using EURAD’s proprietary E39 alloy, our wheel cores deliver durability and safety for rollercoasters in service with major theme park operators. The E39 alloy was developed to overcome the limitations of standard AlMg alloys as well as commonly used AlSi alloys — achieving elongation before cracks exceeding 12% (typically higher in production), fatigue performance below the endurance limit verified through Wöhler-curve analysis, and mechanical properties retained up to 180°C. This property retention covers both passenger-service operating conditions and the elevated curing temperatures of polyurethane re-treading, where conventional cast alloys risk over-aging and permanent loss of strength. EURAD provides certified mechanical-properties assurance on E39 in rollercoaster wheel core applications, conditional on normal use and maintenance with heat exposure kept below 180°C.
