273 mm 13 Cr Casing 16# Thick Wall Alloy from China
13% Chromium seamless alloy steel casing, 273 mm OD, 16 lb/ft nominal with 13.2 mm wall thickness, corrosion-resistant for CO2 environments in gas wells. HTS 7304.29.4140 covers this seamless other alloy steel thick wall casing for drilling applications.
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
• 13Cr is martensitic stainless; verify if customs requires stainless steel treatment under 7304.29.10
• Corrosion test results (e.g
• NACE TM0177) essential for high-alloy grades in sour/CO2 service
• Mark pipes with grade, size, and manufacturer per API 5CT; faded markings cause inspection delays