Magnesia-Herringbone Refractory Bricks from Mexico
Herringbone-patterned magnesia bricks with >50% MgO for improved gas flow in tunnel kilns and reheating furnaces. The angled design prevents brick movement under thermal cycling. HTS 6902.10.50.00 classification for magnesium refractory bricks.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Specify interlocking pattern in technical drawings for classification support
• Test for thermal expansion compatibility with furnace steel shell
• Declare quantities by furnace zone application to justify refractory use