 Dupla™ a newly developed steel from Corus is a ferrite plus martensite dual phase cold heading steel developed to take costs out of the high strength fastener manufacturing process. Tight composition, process and microstructural control provide a consistent rod product that requires neither spheroidisation annealing nor quench & temper heat treatments. The required strength levels are achieved by drawing to size, with cold heading performed on the as-drawn wire. The formability and achievement of high strength product specifications have been demonstrated on a variety of fastener designs. Extensive component testing and analysis of service conditions enables efficient customer process routes to be designed, removing expensive and time consuming heat treatments. Eliminating process stages takes costs out, improves logistics and reduces product lead times. There is a competitive advantage to be gained by utilising new steel products which improve in-house manufacturing efficiencies. |