1. A method of manufacturing metallic blanks from metal wire consisting of the steps of: cutting sections of a given length from the metal wire; inserting individually each section of wire along its longitudinal axis into a prismatic housing in a first matrix, the prismatic housing in the first matrix having a crosssectional shape of an equilateral triangle with its surface being tangent to the wire section along three planes offset relative to each other through 120*; press forging the wire section in the first matrix to form a triangular prismaTic blank; removing the triangular prismatic blank from the first matrix; inserting the triangular prismatic blank into a second housing having a cavity, the cavity receiving the triangular prismatic blank and having a cross-sectional shape of the desired final product which is capable of circumscribing the triangular cross section of the prismatic blank and contacting it along at least three points, and press forging the triangular prismatic blank into the desired shape of second housing cavity whereby defects that could occur from buckling of the blank are prevented.