An aluminum extrusion material for hydraulic bulgeforming, which can produce hydraulic bulge forming componentspossessing highly reliable and sufficient strength and rigiditycapable of withstanding net only a static load, but also a twistload and dynamic load is provided. Also provided is a hydraulicbulge forming method using t he aluminum extrusion material forhydraulic bulge forming as a raw material. The aluminumextrusion material is hollow and used as a material forhydraulic bulge forming. The material is characterized byhaving a partition wall radially crossing the hollow part ofthe extrusion material, wherein the partition wall is providedwith an allowance in length to become flat when the hollow partis formed into a prescribed shape by hydraulic bulge forming.
展开▼
