Section 232 tariffs were once seen as a fortress for US metals. Yet, that fortress now casts a much longer shadow. Companies far removed from the steel and aluminum sector could soon find themselves ensnared in tariffs they never imagined, thanks to the inclusion process for “derivative” products. The Trump Administration has steadily expanded Section 232 authority well beyond their original steel and aluminum targets, to copper, automobiles, trucks, lumber, and even wooden cabinets. These tariffs, which range from 10% (for lumber) to 50% (for steel and aluminum), are layered on top of normal import duties. At first glance, these measures appeared to strike only those industries handling raw materials. But in 2025 the Administration sought to close what it saw as a loophole: downstream products containing tariffed metals that could enter duty-free. As a result, section 232 tariffs were imposed on the raw material and a finite list of derivative products.