9Cr-1Mo-V SA-335 P91 Seamless Pipe from China
Advanced martensitic alloy steel pipe (P91 grade, 9Cr-1Mo-V) with 139.7 mm OD and 12.7 mm minimum wall, for supercritical power plant headers. HTS 7304.59.80.35 applies to its seamless, circular, other alloy steel construction within exact dimension limits. Normalized and tempered per ASTM A335.
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
• Require QTC (Quality Test Certificate) with PWHT (post-weld heat treatment) records for code compliance
• Declare 'P91' grade explicitly; generic 'alloy steel' descriptions trigger secondary exams
• Ship in protective wooden crates to prevent flattening of thick walls during transit