Fabrication of NC Bolts and Niobium Copper Cladded Pipes for Superconducting SRF Cavities and Space Technology

Feature of NC50/25 materials: Copper Nickel Alloy. 1) Perfect none magnetic metal. # No magnetized by machining or welding. 2) Harder material than stainless. 3) No gnawing issue between other materials. # For instance between NC bolt, and screw on SRF NbTi flange. 4)Low temperature brittleness-free. 5)Very small thermal conductivity at cryogenic temperature. # Same as RRR 300 Niobium in superconducting sate. 6)Less particle contamination during tightening NC bolts. # Similar level as to electropolished SUS304 bolts. 7)Good weld-ability with SUS. Recently, MSU/FRIB has reported that they have succeeded to reduce the residual surface resistance to 1nΩ applying to NC25 bolts and nuts to FRIN 0.53 HWR. Delivery Experiences NC bolts (NC50/35/25) [MICHIGAN STATE UNIVERSITY] [RIKEN in Japan]

NC50/Nb Cladded Pipe [MICHIGAN STATE UNIVERSITY]

Patent for NC material applications
JAPAN PATENT OFFICE
Patent No.7126656: NC material application for low temperature technology




Can handle complex shapes
We can also manufacture bolts with complex head shapes.



Lecture notes on superconducting cavities



Contact information

AOI industrial Co. Ltd
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mail : mintblue@aoi-k.co.jp

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