Grade 91 Refining Furnace Tube OD 30mm from China
Seamless Grade 91 (9Cr-1Mo-V) alloy steel tube OD 30 mm for refining furnace transfer lines. Normalized and tempered for creep strength above 600°C. Fits 7304.59.20.40: alloy steel, seamless, small OD, refining furnace suitable.
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
• Q&T heat treatment certificates mandatory; verify against P91 specs
• Mark tubes with grade, heat number, and OD per ASTM standards