Welcome to Gredmann Group! A pioneer in Material Science Product & Divisions 1. Advanced material : Vacuum Deposition Material Div. High-Tech Material Div. Magnetic Material Div. Research Material Div. Semiconductor Material Div. Special Material Div. 2. Metal/Alloy Group : Brazing Material Div. Powder Material Div Hard Facing Material Div. Metal Alloy Div. Electric-Engineering Material Div.