🇺🇸The U.S. expanded 50% additional tariffs to selected Canadian steel and aluminum products, effective September 15.

Telegram reporting attributes to the White House an adjustment to the coverage of an additional 50% ad valorem tariff—a duty assessed by value—on selected Canadian products (调整对加拿大部分产品征收 50%额外从价关税的适用范围). The stated implementation time is 12:01 a.m. U.S. Eastern time on September 15 (美国东部时间 9 月 15 日凌晨 0 时 01 分).

The product descriptions include selected steel products, specified aluminum products, and certain base-metal products (部分钢铁产品、特定铝产品、部分贱金属产品). The broader announcement also covers categories including paper products, golf carts, certain outboard motorboats, and cheese or substitutes not made from cow’s milk (部分纸制品、高尔夫球车及部分舷外机动艇、非牛乳制成的奶酪及奶酪替代制品).

Importantly, the reported change adds some products while removing the previous additional tariff from others (同时取消部分加拿大产品此前适用的 50%额外关税). The source says the attached proclamation lists determine exact coverage; those lists are not supplied, so the material does not establish which individual data-center construction materials or equipment imports are affected.