What is the main characteristic of stainless steel used in casket construction?

Stainless steel's primary characteristic that makes it suitable for casket construction is its resistance to rust and corrosion. Stainless steel is an alloy that contains a minimum of 10.5% chromium, which adds a protective layer that prevents oxidation. This property is particularly important for caskets, as they are often exposed to moisture and varying environmental conditions. The rust-resistant feature ensures that the casket maintains its integrity and appearance over time, providing a lasting and dignified option for burial.

While the other options present characteristics of materials, they do not specifically pertain to the defining qualities of stainless steel in this context. For instance, stainless steel is not necessarily lightweight compared to other materials; hence, its weight varies depending on the thickness and design. Additionally, it does not contain copper as a primary component, as copper is not a part of the stainless steel alloy composition typically used in casket manufacturing. Thus, the emphasis on rust resistance underlines the durability and suitability of stainless steel for casket use.