Use of polyamides that are resistant to corrosion and stress cracking

A method comprising producing a thermoplastic molding material comprising

• A) 10 to 98.8% by weight of a mixture formed from
• a1) 40 to 70% by weight of nylon-6,6 or nylon-4,6 or nylon-6 or mixtures thereof,
• a2) 30 to 60% by weight of a polyamide having a ratio of methylene to amide groups of 7 to 12,
• B) 1 to 50% by weight of a fibrous or particulate filler,
• C) 0.05 to 3% by weight of an ion-free lubricant,
• D) 0.05 to 3% by weight of a heat stabilizer,
• E) 0 to 40% by weight of further additives,
• where the sum of the percentages by weight A) to E) and a1) and a2) adds to 100% by mixing components A) through E) to form a mixture, and then extruding the mixture, and producing a stress cracking- and corrosion-resistant molding comprising the mixture.