Yes, there are significant variations in the crimping pressure requirements of bimetallic connectors and regular single-metal connectors. These variations are mainly a consequence of the varying physical properties of the metals used—commonly copper and aluminium in the case of bimetallic connectors. Bimetallic connectors need to be crimped accurately to make a permanent and secure... https://www.pioneerpowers.com/bimetallic-lugs-and-connectors.php