AISI 4340 Chromium-Molybdenum Steel Slab from Japan
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 — Japan → United States
50%
Rate breakdown
9903.82.0250%Except as provided for in headings 9903.82.14, 9903.85.67 and 9903.85.68, articles of aluminum, of steel or of copper and derivative aluminum or steel articles, as provided for in subdivisions (c)(i)–(v) of U.S. note 16 to this subchapter
9903.05.900%Articles already subject to Section 232 (steel/aluminum/copper + derivatives, autos + parts, wood, medium/heavy vehicles + parts, semiconductors, patented pharma) — U.S. note 52(f)
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