What is the tensile strength reduction range for soft drawn wires compared to hard drawn copper?

The tensile strength reduction for soft drawn wires compared to hard drawn copper is relevant for understanding the mechanical properties of these materials. Soft drawn copper has been subjected to less work hardening, which leads to a decrease in tensile strength compared to hard drawn copper, which is characterized by higher strength due to its manufacturing process that involves more extensive drawing and cold working.

The range indicated by the correct choice accurately reflects this difference. Hard drawn copper typically has a tensile strength of around 55,000 lbs/in2, while soft drawn copper can exhibit tensile strengths that are considerably lower due to its more ductile and malleable nature. The values provided in this choice range from 55,000 lbs/in2 (representing the hard drawn) down to 35,000 lbs/in2 (for the soft drawn), illustrating a significant yet realistic reduction in tensile strength resulting from the softer characteristics of the material.

This choice captures the expected behavior of these copper types in practical applications, such as electrical wiring, where the tensile strength of a material can greatly affect its performance and longevity under stress. Understanding this reduction is crucial for engineers and designers when selecting materials for specific applications.