AISI 4140 Hot-Rolled Alloy Steel Round Bar from China
A 250 mm diameter round bar made from AISI 4140 chromium-molybdenum alloy steel, hot-rolled for structural applications. Classified under HTS 7228.30.80.70 as other alloy steel bars not further worked than hot-rolled, with diameter exceeding 228 mm. Used in heavy machinery shafts and axles due to its high strength and toughness.
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
Import Tips
• Provide mill test certificates confirming alloy composition meets Chapter 72 definitions for alloy steel
• Verify exact diameter measurement exceeds 228 mm to avoid misclassification into smaller size subheadings
• Check for any surface treatments that could classify as 'further worked' under Chapter 72 notes