A structural component with a tubular section, particularly a structural component of a fluid line, has at least two materials with different stiffness and/or creeping strength, wherein the materials include thermoplastic synthetic materials and wherein the material having the greater stiffness and/or creeping strength is embedded in the other material. The tubular section has a continuous annular surface which extends coaxially with the longitudinal center axis of the structural component and has the same material which has been injection molded over the annular surface in a predetermined quantity ratio relative to the outer material, or between 40% and 100% of the annular surface are composed of the same injection molded material and are distributed in uniform spacings in circumferential direction of the annular surface.