4340 Alloy Steel Structural Tee
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.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If forged rather than rolled
Forged alloy shapes classify under semi-finished 7224 rather than rolled sections.
If chipper knife steel
Specialty alloys like chipper knife steel have dedicated subheadings.
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Import Tips & Compliance
• 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
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