Moulding compound which contains at least 40 wt.% of the following components: a) 60 to 99 parts by wt. of a partially aromatic copolyamide which consists of repeating units which are derived from I. 30 to 90 mol% of a combination of hexamethylenediamine and terephthalic acid and II. 70 to 10 mol% of a lactam and/or of an ω-aminocarboxylic acid with 11 or 12 C atoms, wherein the mol% values relate to the sum of I and II and wherein at most 20% of the hexamethylenediamine can be replaced by the equivalent quantity of another diamine and/or wherein at most 20% of the terephthalic acid can be replaced by the equivalent quantity of another aromatic dicarboxylic acid and/or 1,4-cyclohexanedicarboxylic acid and/or wherein at most 20% of the repeating units of a lactam and/or of an ω-aminocarboxylic acid with 11 or 12 C atoms can be replaced respectively by the equivalent quantity of units which are derived from a combination of hexamethylenediamine and a linear aliphatic dicarboxylic acid with 8 to 19 C atoms and/or caprolactam, b)40 to 1 parts by wt. of an olefinic copolymer which contains the following monomer units: - 35 to 94.9 wt.% of ethene-based monomer units, - 5 to 65 wt.% of monomer units based on a 1-alkene with 4 to 8 C atoms, - 0 to 10 wt.% of monomer units based on another olefin and - 0.1 to 2.5 wt.% of monomer units based on an aliphatically unsaturated dicarboxylic acid anhydride, wherein the individual contents are selected such that the sum of these wt.% values is 100 and wherein the sum of the parts by wt. of a) and b) is 100. a) 60 to 99 parts by wt. of a partially aromatic copolyamide which consists of repeating units which are derived from I. 30 to 90 mol% of a combination of hexamethylenediamine and terephthalic acid and II. 70 to 10 mol% of a lactam and/or of an ω-aminocarboxylic acid with 11 or 12 C atoms, wherein the mol% values relate to the sum of I and II and wherein at most 20% of the hexamethylenediamine can be replaced by the equivalent quantity of another diamine and/or wherein at most 20% of the terephthalic acid can be replaced by the equivalent quantity of another aromatic dicarboxylic acid and/or 1,4-cyclohexanedicarboxylic acid and/or wherein at most 20% of the repeating units of a lactam and/or of an ω-aminocarboxylic acid with 11 or 12 C atoms can be replaced respectively by the equivalent quantity of units which are derived from a combination of hexamethylenediamine and a linear aliphatic dicarboxylic acid with 8 to 19 C atoms and/or caprolactam, I. 30 to 90 mol% of a combination of hexamethylenediamine and terephthalic acid and II. 70 to 10 mol% of a lactam and/or of an ω-aminocarboxylic acid with 11 or 12 C atoms, b)40 to 1 parts by wt. of an olefinic copolymer which contains the following monomer units: - 35 to 94.9 wt.% of ethene-based monomer units, - 5 to 65 wt.% of monomer units based on a 1-alkene with 4 to 8 C atoms, - 0 to 10 wt.% of monomer units based on another olefin and - 0.1 to 2.5 wt.% of monomer units based on an aliphatically unsaturated dicarboxylic acid anhydride, wherein the individual contents are selected such that the sum of these wt.% values is 100 - 35 to 94.9 wt.% of ethene-based monomer units, - 5 to 65 wt.% of monomer units based on a 1-alkene with 4 to 8 C atoms, - 0 to 10 wt.% of monomer units based on another olefin and - 0.1 to 2.5 wt.% of monomer units based on an aliphatically unsaturated dicarboxylic acid anhydride,