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This article presents comparative tests of contact strength and tribological wear resistance
of polymer sliding materials of the polyamide group. The aim of this work was to study Shore
hardness, indentation hardness, modulus, creep, relaxation, Martens hardness and sliding wear
resistance of two commercial materials. One of these materials was produced with the recycling
process in mind. Abrasion tests were performed against a stainless-steel ball (100CRr6) on a normal
load of 5 N for 23,830 friction cycles. The samples were tested under dry friction conditions and
taking into account the hydrothermal factor, the presence of which was assumed in the anticipated
operating conditions. It was distilled water at a temperature of 50 ◦C. The volumetric wear of
the samples under various environmental conditions was assessed and related to the mechanical
properties, in particular, Shore hardness. This mechanical size, which characterizes the surface, was
considered the most frequently used by engineers selecting polymeric materials for tribological
applications in industry. The Shore hardness of both materials was similar, which may indicate
similar tribological performance properties. However, research and analysis indicate the need to use
measures that directly correspond to tribological wear. The friction and wear of both materials varied.
The coefficient of friction in hydrothermal conditions was lower and the wear was higher than in the
dry friction test. It seems that it was not hardness that determined the suitability in the anticipated
operating conditions, but the ability to form a sliding layer on the friction surface. The properties of
the material that has been envisaged as a replacement may be appropriate for the intended uses.