Polyamide moulding composition made of the following constituents: from 25 to 74.9% by weight of at least one semicrystalline, semiaromatic nylon-6T/6I, composed of: from 65 to 82 mol% of terephthalic acid, based on the entirety of the dicarboxylic acids used; from 18 to 35 mol% of isophthalic acid, based on the entirety of the dicarboxylic acids used; 1,6-diaminohexane; at least one monobasic carboxylic acid; from 40 to 400 ppm of phosphorus, based on the mass of the anhydrous input weight of the entirety of the components to, in the form of a phosphorus compound; with the first proviso that the molar ratio of the component to the entirety of the dicarboxylic acids used ( +) is at least 1.04 and at most 1.10; and with the second proviso that the molar ratio of the component to the component is in the range from 0.01 to 0.08; from 25 to 60% by weight of fibrous reinforcing materials; from 0 to 30% by weight of particulate fillers, optionally in surface-treated form, selected from the group consisting of: talc, mica, silicate, quartz, titanium dioxide, wollastonite, kaolin, amorphous silicas, magnesium carbonate, magnesium hydroxide, chalk, lime, feldspar, barium sulphate, solid or hollow glass beads, ground glass, permanently magnetic or magnetizable metal compounds and/or alloys, and also mixtures of the members of this group; from 0.1 to 2% by weight of heat stabilizers, with the proviso that no copper-containing stabilizers are present therein; from 0 to 2% by weight of carbon black; from 0 to 4% by weight of auxiliaries and/or additives differing from C, D and E; where the entirety of the components - makes up 100% by weight. from 25 to 74.9% by weight of at least one semicrystalline, semiaromatic nylon-6T/6I, composed of: from 65 to 82 mol% of terephthalic acid, based on the entirety of the dicarboxylic acids used; from 18 to 35 mol% of isophthalic acid, based on the entirety of the dicarboxylic acids used; 1,6-diaminohexane; at least one monobasic carboxylic acid; from 40 to 400 ppm of phosphorus, based on the mass of the anhydrous input weight of the entirety of the components to, in the form of a phosphorus compound; with the first proviso that the molar ratio of the component to the entirety of the dicarboxylic acids used ( +) is at least 1.04 and at most 1.10; and with the second proviso that the molar ratio of the component to the component is in the range from 0.01 to 0.08; from 65 to 82 mol% of terephthalic acid, based on the entirety of the dicarboxylic acids used; from 18 to 35 mol% of isophthalic acid, based on the entirety of the dicarboxylic acids used; 1,6-diaminohexane; at least one monobasic carboxylic acid; from 40 to 400 ppm of phosphorus, based on the mass of the anhydrous input weight of the entirety of the components to, in the form of a phosphorus compound; from 25 to 60% by weight of fibrous reinforcing materials; from 0 to 30% by weight of particulate fillers, optionally in surface-treated form, selected from the group consisting of: talc, mica, silicate, quartz, titanium dioxide, wollastonite, kaolin, amorphous silicas, magnesium carbonate, magnesium hydroxide, chalk, lime, feldspar, barium sulphate, solid or hollow glass beads, ground glass, permanently magnetic or magnetizable metal compounds and/or alloys, and also mixtures of the members of this group; from 0.1 to 2% by weight of heat stabilizers, with the proviso that no copper-containing stabilizers are present therein; from 0 to 2% by weight of carbon black; from 0 to 4% by weight of auxiliaries and/or additives differing from C, D and E;