AISI 4340 Nickel-Chromium-Molybdenum Flat Slab from Mexico
AISI 4340 low-alloy steel flat slab in semi-finished form with width at least four times thickness, used for aerospace and structural applications. Falls under HTS 7224.90.0055 as rectangular cross-section other alloy steel, excluding special definitions like razor blade or ball-bearing steel.
Duty Rate — Mexico → 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
• Document Ni-Cr-Mo content to confirm 'other alloy steel' status, avoiding tool steel reclassification
• Measure and certify cross-sectional dimensions precisely to meet 'width at least four times thickness' criteria
• Declare as semi-finished (not further worked like coated/polished) per Chapter note