American Copper Heat Exchanger Tubes Finned from Japan
Copper tubes extruded in US facilities, exported for high-fin rotary finning operations creating extended surface area, returned for heat exchanger core assembly. The finning dramatically increases heat transfer surface. HTS 9802.00.60.00 covers US copper further processed.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
Import Tips
• Document finning machine specifications, fin density, and tube wall thickness reductions
• Provide US extrusion process records and copper alloy chemistry
• Include fin bond integrity and heat transfer performance test data