API Spec 5CT C75 Tubing from China
C75 grade seamless nonalloy steel tubing per API 5CT for controlled yield oil/gas wells. Balances strength and ductility for drilling completions. HTS 7304.29.50 classification for nonalloy drill tubing.
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
• C75 requires special notch toughness testing—include impact test results
• Mark grade clearly; C75/C95 confusion common in mixed lots
• Trade agreements may offer duty relief for certified API products