Czochralski Crystal Puller Work Roll from China
A cast steel work roll used in the Czochralski method crystal pullers for producing monocrystalline silicon boules from which semiconductor wafers are sliced. It falls under HTS 8455.30.0035 as a cast steel roll for rolling mills, weighing not over 2,268 kg, specifically adapted for precise material processing in semiconductor boule formation. The roll's surface ensures uniform pulling and minimal contamination during crystal growth.
Duty Rate — China → United States
Rate breakdown
Import Tips
• Verify roll weight does not exceed 2,268 kg and confirm cast steel composition via mill certificates to avoid reclassification
• Provide detailed engineering specs showing semiconductor end-use for potential duty relief under specialized programs
• Ensure rolls are free of contaminants; common pitfall is improper cleaning documentation leading to rejection