7228.30.80/AISI 4140 Hot-Rolled Alloy Steel Round Bar/China

AISI 4140 Hot-Rolled Alloy Steel Round Bar from China

AISI 4140 is a chromium-molybdenum alloy steel round bar produced by hot-rolling, used for shafts, gears, and axles in machinery. It falls under HTS 7228.30.80 as other bars and rods of alloy steel, not further worked than hot-rolled, hot-drawn or extruded. The alloy composition exceeds simple carbon steel definitions and lacks special alloy steel specifications from chapter notes.

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

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Import Tips

• Provide mill test certificates confirming alloy composition (e.g

• Cr 0.8-1.1%, Mo 0.15-0.25%) to verify classification as alloy steel

• Ensure documentation specifies 'not further worked than hot-rolled' to avoid reclassification under cold-worked headings like 7228.50

• Check for high-strength steel note (a) compliance; if yield strength exceeds thresholds, alternative classification may apply