The 4th International Conference on Extrusion and Benchmark (ICEB 2011) will be held in Bologna, Italy from October 3-5, 2011. A large number of extruders, die makers, software houses, and researchers will gather at the event to discuss the core technology of light metal extrusion. More than 50 abstracts have been accepted on light alloy extrusion processing and the first day will be dedicated to these sessions. Papers will be also presented on ultra light alloys and new applications for extruded profiles. Process optimization and solutions to extrusion related issues will be analyzed thoroughly by several contributors. The second day of the event will be mainly dedicated to the benchmark experiment and participant results where the results of two monitored experiments will be discussed. The Scientific Benchmark will focus on the different strategies for balancing the material flow in porthole dies and its die design will deal with issues of hollow profile production, such as seam welding mechanism and material flow.