AISI 9310 Gear Steel Square Bloom from Japan
Case-hardening 9310 alloy steel square bloom for precision gears, controlled dimensions <4x thickness ratio. Classifies under 7224.90.0045 as other alloy steel semi-finished. Ni-Cr-Mo composition optimized for gear applications.
Duty Rate — Japan → United States
50%
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
9903.05.900%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
• Gear quality grade certification; Core hardness documentation; Square dimension verification essential