Chromite Mullite Composite Refractories from Canada
Composite shapes blending chromite and mullite for glass tank regenerator checkerwork. Under HTS 6815.91.00 primarily for chromite component. High thermal cycling resistance.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Specify chromite >30% for 6815.91 qualification
• Glass tank documentation differentiates use
• Thermal expansion data supports classification