AISI 4340 Chromium-Molybdenum Steel Slab from China
AISI 4340 alloy steel slabs for aerospace forgings and high-stress components, typically 200-400mm thick in rectangular form. Classified in 7224.90.00 as semi-finished other alloy steel, not meeting tool steel or high-strength definitions in U.S. notes, intended for hot rolling into plates.
Duty Rate — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
9903.91.0125%Effective with respect to entries on or after September 27, 2024, articles the product of China, as provided for in subdivision (b) of U.S. note 31 to this subchapter
Import Tips
• Declare exact dimensions and require heat analysis certificates; slabs must not be in coils or further worked (e.g
• no coatings)
• Watch for Section 232 tariffs on steel imports exceeding quotas