High Purity Mullite for Investment Casting from Germany
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 — Germany → United States
10%
Rate breakdown
9903.05.3910%Section 301 (forced labor) — European Union member state (col1 rate < 10 percent): MFN < 10% → total duty capped at 10%
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