T/P91 Grade 91 Seamless Heat Exchanger Tube from China
Grade 91 (9Cr-1Mo-V) seamless alloy steel tube, 140 mm OD, engineered for high-temperature heat exchangers and feedwater heaters in fossil fuel plants. Provides excellent creep strength and oxidation resistance. Under 7304.59.20.55 for its alloy composition, seamless construction, and suitability for heat exchangers with OD 114.3-190.5 mm.
Duty Rate — China → United States
35%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 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
Import Tips
• Confirm normalizing/tempering heat treatment per ASTM A335; include dimensional inspection reports
• Avoid pitfall of bulk packaging misclassified as scrap metal