13-3/8 Inch 13Cr Alloy Steel Sour Service Casing from Canada
Seamless 13Cr (13% chromium) alloy steel casing optimized for sour (H2S) environments in oil drilling, 339.7 mm OD and 10.92 mm wall thickness. Meets HTS 7304.29.4150 criteria for other alloy steel seamless casing used in oil/gas drilling with OD 285.8-406.4 mm and wall <12.7 mm.
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
9903.03.060%Articles of aluminum, of steel, or of copper or derivative aluminum or steel articles; passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; medium- and heavy-duty vehicles; parts of medium- and heavy-duty vehicles; wood products; and semiconductor articles, of any country, as provided in subdivision (aa)(v) of U.S. note 2 to this subchapter
Import Tips
• Include NACE MR0175/ISO 15156 certification for sour service to support alloy classification and duty assessment
• Measure and document wall thickness precisely; values approaching 12.7 mm risk upward reclassification
• Avoid common pitfall of generic 'steel pipe' descriptions—specify 'oil well casing, alloy steel, seamless' on all docs