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 95 parts by wt. of a partially 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 5 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 mixture of the following components: 1) 75 to 100 parts by wt. of a partly aromatic copolyamide and 2) 25 to 0 parts by wt. of an olefinic copolymer as impact modifier with the proviso that in the moulding compound of layer II the mixture of components 1) and 2) comprises at least 5 fewer parts by wt. of olefinic copolymer than in the moulding compound of layer I. I. a first layer (layer I) of a moulding compound comprising at least 40 wt% of the following components: 1) 60 to 95 parts by wt. of a partially 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 5 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 95 parts by wt. of a partially 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 5 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 mixture of the following components: 1) 75 to 100 parts by wt. of a partly aromatic copolyamide and 2) 25 to 0 parts by wt. of an olefinic copolymer as impact modifier 1) 75 to 100 parts by wt. of a partly aromatic copolyamide and 2) 25 to 0 parts by wt. of an olefinic copolymer as impact modifier