The lowest resistivity is found in aluminium, copper, and brass, to name a few. They are commonly used in the development of the plug pins. Gold is a feasible material but it is expensive. Aluminium is not suitable as a removal plug. There is a need to choose between copper and brass. This is determined based on the strength or toughness of the material. Brass has a higher strength and better resistance than copper. This brass is used to make pins as it meets all the three prerequisites needed for the creation of the material. Brass is an alloy of copper and hence is considered to be more feasible.
This material Brass is considered to be appropriate as it meets the needs of the people. There is also the development of alternative materials that are developed in the recent decades. There are the improved prospects of developing these plugs using sustainable materials.
Research studies highlight that when a take-back system or regeneration system is implemented for core plugs, the efficiency in economic and environmental impact is around 57 percent. It is 51 percent when the plugs are destroyed. Similarly, in the old plug design using traditional pin materials, the positive environmental effects are 66 percent compared to the improved gain in sustainability at 77% as presented in the use of improved pins in plugs.