Multilayer composite comprising the following layers: I. a first layer (layer I) of a moulding compound comprising at least 40 wt% of the following components: 1) 60 to 99 parts by wt. of a partly aromatic copolyamide which consists of monomer units which are derived from α) 30 to 90 mol% of a combination of hexamethylenediamine and terephthalic acid and β) 70 to 10 mol% of a combination of hexamethylenediamine and a linear aliphatic dicarboxylic acid having 8 to 19 carbon atoms; wherein the mol% values relate to the sum of α) and β) and wherein not more than 20% of the hexamethylenediamine may be replaced by the equivalent amount of another diamine and/or wherein not more than 20% of the terephthalic acid may be replaced by the equivalent amount of another aromatic dicarboxylic acid and/or 1,4-cyclohexanedicarboxylic acid and/or wherein not more than 20% of the repeating units composed of hexamethylenediamine and linear aliphatic dicarboxylic acid may be replaced by the equivalent quantity of units derived from a lactam/an ω-aminocarboxylic acid having 6 to 12 carbon atoms, 2) 40 to 1 parts by wt of an olefinic copolymer as impact modifier, wherein the parts by wt. of 1) and 2) sum to 100; and II. a second layer (layer II) of a moulding compound comprising at least 60 wt% of a polyamide producible from the following monomers: α) 80 to 100 mol% of m- and/or p-xylylenediamine and β) 0 to 20 mol% of other diamines having 6 to 14 carbon atoms, wherein the mol% values here are based on the sum of all diamine, and also γ) 70 to 100 mol% of aliphatic dicarboxylic acids having 4 to 12 carbon atoms and δ) 0 to 30 mol% of other dicarboxylic acids having 6 to 12 carbon atoms, wherein the mol% values here are based on the sum of all dicarboxylic acid. I. a first layer (layer I) of a moulding compound comprising at least 40 wt% of the following components: 1) 60 to 99 parts by wt. of a partly aromatic copolyamide which consists of monomer units which are derived from α) 30 to 90 mol% of a combination of hexamethylenediamine and terephthalic acid and β) 70 to 10 mol% of a combination of hexamethylenediamine and a linear aliphatic dicarboxylic acid having 8 to 19 carbon atoms; wherein the mol% values relate to the sum of α) and β) and wherein not more than 20% of the hexamethylenediamine may be replaced by the equivalent amount of another diamine and/or wherein not more than 20% of the terephthalic acid may be replaced by the equivalent amount of another aromatic dicarboxylic acid and/or 1,4-cyclohexanedicarboxylic acid and/or wherein not more than 20% of the repeating units composed of hexamethylenediamine and linear aliphatic dicarboxylic acid may be replaced by the equivalent quantity of units derived from a lactam/an ω-aminocarboxylic acid having 6 to 12 carbon atoms, 2) 40 to 1 parts by wt of an olefinic copolymer as impact modifier, wherein the parts by wt. of 1) and 2) sum to 100; and 1) 60 to 99 parts by wt. of a partly aromatic copolyamide which consists of monomer units which are derived from α) 30 to 90 mol% of a combination of hexamethylenediamine and terephthalic acid and β) 70 to 10 mol% of a combination of hexamethylenediamine and a linear aliphatic dicarboxylic acid having 8 to 19 carbon atoms; wherein the mol% values relate to the sum of α) and β) and wherein not more than 20% of the hexamethylenediamine may be replaced by the equivalent amount of another diamine and/or wherein not more than 20% of the terephthalic acid may be replaced by the equivalent amount of another aromatic dicarboxylic acid and/or 1,4-cyclohexanedicarboxylic acid and/or wherein not more than 20% of the repeating units composed of hexamethylenediamine and linear aliphatic dicarboxylic acid may be replaced by the equivalent quantity of units derived from a lactam/an ω-aminocarboxylic acid having 6 to 12 carbon atoms, α) 30 to 90 mol% of a combination of hexamethylenediamine and terephthalic acid and β) 70 to 10 mol% of a combination of hexamethylenediamine and a linear aliphatic dicarboxylic acid having 8 to 19 carbon atoms; 2) 40 to 1 parts by wt of an olefinic copolymer as impact modifier, II. a second layer (layer II) of a moulding compound comprising at least 60 wt% of a polyamide producible from the following monomers: α) 80 to 100 mol% of m- and/or p-xylylenediamine and β) 0 to 20 mol% of other diamines having 6 to 14 carbon atoms, wherein the mol% values here are based on the sum of all diamine, and also γ) 70 to 100 mol% of aliphatic dicarboxylic acids having 4 to 12 carbon atoms and δ) 0 to 30 mol% of other dicarboxylic acids having 6 to 12 carbon atoms, wherein the mol% values here are based on the sum of all dicarboxylic acid. α) 80 to 100 mol% of m- and/or p-xylylenediamine and β) 0 to 20 mol% of other diamines having 6 to 14 carbon atoms, wherein the mol% values here are based on the sum of all diamine, and also γ) 70 to 100 mol% of aliphatic dicarboxylic acids having 4 to 12 carbon atoms and δ) 0 to 30 mol% of other dicarboxylic acids having 6 to 12 carbon atoms, wherein the mol% values here are based on the sum of all dicarboxylic acid.