</>Build with Tariff Intelligence|Programmatic access to tariff calculations and HS code classification.Explore Developer Resources →

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