AISI 4140 Alloy Steel Round Billet from Mexico
AISI 4140 is a chromium-molybdenum alloy steel billet used for forging shafts and gears, supplied in semi-finished round form with diameters typically 100-300mm. It falls under HTS 7224.90.00 as a semi-finished product of other alloy steel (not stainless), distinct from stainless in chapter 7221 or high-strength/specialty steels defined in notes. These primary forms require further hot working like rolling or forging.
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 of aluminum, of steel or of copper or derivative aluminum or steel articles; passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans and cargo vans) and light trucks; parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans and cargo vans) and light trucks; medium- and heavy-duty vehicles; parts of medium- and heavy-duty vehicles; wood products; patented pharmaceutical articles; and semiconductor articles, as provided in subdivision (f) of U.S. note 52 to this subchapter
Import Tips
• Provide mill test certificates verifying alloy composition (e.g
• Cr 0.8-1.1%, Mo 0.15-0.25%) to confirm 'other alloy steel' status; ensure no further working like polishing per chapter note
• Common pitfall: incorrect declaration as stainless steel leading to chapter 7221 duties