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The material PA, polyamide or also commonly referred to as nylon, is a semi-crystalline thermoplastic with low density and high thermal stability. The nylon plastic is one of the most important construction plastics due to its excellent wear resistance, its good coefficient of friction and its very good temperature resistance and impact strength. Polyamide plastic, often occurs in conjunction with numbers such as PA 6, PA 66, PA 12 and PA 46.

Steel is an iron-carbon alloy with a maximum carbon content of 2% by mass. The steels achieve their intended physical and mechanical properties through various hardening, annealing and tempering processes. It is also possible to harden the edge zone by surface hardening, case hardening or nitriding. Well-known steel grades are structural steels, free-machining steels, case-hardening steels, nitriding steels, tempering steels, tool steels and stainless steels.