AISI 9310 Gear-Quality Alloy Wire 3.2mm from China
Case-hardening alloy steel wire (AISI 9310) with 3.2 mm round diameter for precision gears in aviation and racing. HTS 7229.90.50.51 applies to this other alloy steel wire ≥1.5 mm, not ball-bearing steel per note (h). Clean surface finish for cold heading into fasteners.
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 spectrographic analysis excluding ball-bearing steel elements (note h); measure diameter at multiple points for consistency
• Avoid coiling too tightly to prevent ovality misclassification