What type of metal is noted for its low tensile strength and poor ductility, making it not adaptable to welding?

The metal noted for its low tensile strength and poor ductility, making it less adaptable to welding, is cast iron. Cast iron has a high carbon content, which gives it excellent castability and wear resistance but significantly lowers its tensile strength compared to other metals. Additionally, the brittleness that comes with cast iron makes it difficult to weld; it tends to crack under thermal stress when subjected to welding processes.

In contrast, copper, aluminum, and bronze typically exhibit better ductility and tensile strength, which allows them to be welded more effectively. Copper is known for its electrical and thermal conductivity, while aluminum is lightweight and can handle welding processes quite well. Bronze, an alloy primarily of copper and tin, also displays good ductility and can be welded with proper techniques. Therefore, the ability to weld is influenced significantly by the inherent properties of the metal in question, where cast iron stands out for its challenges in this aspect.