... & Electronics 4.Auto Parts & Accessories Sand Casting Wheel,CNC Machining OEM Part 1. Material: Ductile Iron 2. ... Process: Sand casting, CNC machining 3. QC involved: . Chemical composition by OBLF spectrumeter ... 1B material certificate . Dimension reports for AQL quantity Advantages . CNC machining facilities Japan origin; . Microstructure, Hardness tester, Coating tester ...