Recurring BIS Section 232 steel/aluminum inclusion window for 2027-05; dates are rule-based projections and exact request dates must follow the official posting.

A Section 232 measure is a U.S. trade action based on a finding that certain imports may affect national security. For steel and aluminum, an “inclusion window” generally refers to a period when parties may request that additional steel- or aluminum-related products be covered by the measure. The Bureau of Industry and Security (BIS) administers the relevant process, and the official notice controls the eligible products, procedures, and deadlines.

This type of measure can affect manufacturers, distributors, and ecommerce importers when their goods fall within the covered product scope or contain covered steel or aluminum. Classification under the Harmonized Tariff Schedule of the United States (HTSUS), product description, country of origin, material content, and entry details may all matter. A projected window is only an estimate based on a recurring rule; do not treat it as an official filing period until BIS publishes the applicable notice.

What to check

• Check the current BIS notice and Federal Register posting for the official scope, request procedures, and filing dates.
• Confirm the product’s complete HTSUS classification and compare both the tariff number and the written product description with the measure.
• Document the steel or aluminum content, processing history, country of origin, and supplier information where the rules require those facts.
• Review whether the product is already covered, excluded, or subject to a separate exclusion or reporting process; do not rely only on a general product name.
• Ask a qualified customs broker or trade professional to review uncertain classifications, content calculations, and Section 232 applicability before entry.