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Frame rails in AHSS for lightweighting of trucks & LCVs
Frame rails, aka subframe rails, for trucks and light commercial vehicles (LCVs) require strength, stiffness, and fatigue resistance: AHSS and UHSS steels provide all that, plus significant lightweighting advantages.
AHSS frame rails that are stiff, durable, and light-in-weight
Frame rails made from Docol® AHSS and UHSS steels can improve the strength, stiffness, and durability of delivery vans, pick-up trucks, and other light commercial vehicles, typically defined as vehicles with a gross weight of no more than 3.5 metric tonnes.
Unlike aluminum frame rails – which are vulnerable to sagging and fatigue – frame rails made from AHSS have a much higher modulus of elasticity (stiffness). To achieve additional weight reductions, LCV designers can tailor the thickness of the steel along the length of the frame rail, optimizing AHSS strength where it’s needed. Another option is to run cost/benefit analyses for even stronger steel grades, such as Docol® hot-rolled, cold-formed 1200M.
Increased frame rail performance for new BEV van
When Iveco designed its eDaily – a BEV version of its popular Daily van/cab (truck) offering – it needed to significantly improve the strength of its frame rails for the increased weight and safety requirements of the battery electric powertrain. By replacing the existing 3.0 mm HR420LA steel with 3.0 mm Docol® HR800HER-75, Iveco was able to increase the overall performance of its frame rails. The new frame rails are roll formed, with numerous punched holes along its flanges, taking advantage of excellent cold-forming properties of the Docol® HR800HER-75 — which has a typical hole expansion ratio of 75%.