CPM-M4 Tool Steel Flat Stock 8x20mm from Mexico
Precision-ground but cold-finished flat stock of CPM-M4 tool steel (1.4% C, 4% Cr, 4% V—note e(i)/(ii)), max 20mm but effective cross-section <18mm, for wear parts. 7228.50.10.40 as other tool steel bars cold-formed.
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
• Clarify 'maximum cross-sectional dimension' in docs—typically larger side for rectangles
• PM steels need detailed analysis certs; powder metallurgy doesn't change steel classification
• Avoid 'ground' terminology if precision-ground exceeds cold-finishing tolerances