4340 Alloy Steel Structural Tee from China
T-shaped structural section from 4340 nickel-chromium-molybdenum alloy steel, used in aircraft landing gear mounts. HTS 7228.70.60.00 for alloy shapes. Provides high tensile strength and toughness.
Duty Rate — China → United States
75%
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
9903.91.0125%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
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
• Include SAE 4340 specification sheets showing alloying elements qualifying under Chapter 72
• Confirm hot-rolled, not forged (forgings go to 7224.90)
• Label to distinguish from heat-resisting steel (note g) applications