Waste Quenching Oil from Heat Treatment from China
Polymer-quenched oil residue from metal hardening processes, hydrocarbon matrix <50% single compound. Classifies under 2710.99.4500 as unspecified waste hydrocarbon mixtures.
Duty Rate — China → United States
7.5%
Rate breakdown
9903.88.157.5%Except as provided in headings 9903.88.39, 9903.88.42, 9903.88.44, 9903.88.47, 9903.88.49, 9903.88.51, 9903.88.53, 9903.88.55, 9903.88.57, 9903.88.65, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(r) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(s)
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Document heat treatment cycle parameters proving quenching usage
• Analyze polymer degradation products for complete composition
• High temperature history requires flash point verification