High Purity Mullite for Investment Casting from Canada
High purity mullite specifically graded for investment casting shells provides thermal stability and low thermal expansion. Falls under HTS 2508.60.00.00 as specialized mullite earth for industrial refractory use.
Duty Rate — Canada → United States
10%
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
Import Tips
• Certify mullite phase purity (>98%) via X-ray diffraction reports for customs scrutiny
• Specify end-use as casting shell stucco to avoid precious metal melting crucible misclassification