4145 QT Alloy Steel Cold Bar 140 mm Round from China
4145 quenched-and-tempered alloy steel bar, cold-finished 140 mm diameter for drill collars and heavy shafts. HTS 7228.50.5040 applies to cold-formed alloy bars 76-228 mm, not further worked despite QT condition. Alloy via Cr-Mo content.
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
• QT heat treatment allowed if surface remains cold-finished only, not machined
• Certify 4145 chemistry distinctly from 4140 for proper alloy identification
• Oilfield applications may trigger special documentation requirements