AISI 9310 Aircraft Gear Steel Billet
High-performance AISI 9310 Ni-Cr-Mo alloy steel billets for nitrided aircraft gears and bearings. Classified 7224.90.00 as semi-finished other alloy steel, excluding ball-bearing steel note (h) compositions.
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More Specific Codes
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If hot-rolled into bars/rods
Progresses to hot-rolled alloy steel bars in heading 7228 after billet stage.
If tool steel composition per note (e)
Specific carbon/chromium combos define tool steel semi-finished products separately.
If rolled into angles/shapes
Hot-rolled alloy steel angles, shapes, sections have dedicated 7226 provisions.
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Import Tips & Compliance
• Aerospace end-use may require ITAR/EAR docs alongside steel certs; verify C 0.08-0.13%, Ni 3.0-3.5%
• Pitfall: rust/discoloration doesn't reduce duties per chapter note
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