O1 Tool Steel Flat Bar Stock from China
O1 oil-hardening tool steel in rectangular semi-finished form with width less than four times thickness, used for making gauges and fixtures. HTS 7224.90.0015 covers this as other alloy tool steel rectangular primary forms. Composition includes 0.85-1.0% C and 1-1.8% Mn per tool steel definition (e)(iii).
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
• Include heat analysis showing 0.85%+ C and 1-1.8% Mn to qualify as tool steel under note (e)(iii)
• Verify and record exact cross-sectional dimensions for customs dimension verification
• Ensure product remains in primary form without further working treatments listed in chapter notes