9Cr-1Mo-V SA-335 P91 Seamless Pipe from Canada
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 — Canada → 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
• 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