... /CS70/SAE1065 3.professional cutting, polishing,slitting blue steel strips for rolling shutter part Heat treatment is carried out ... DC04EK or EK2, EK4Finishes: Bright, blue, polish blueEdge: Mill, Slit, RoundTempers: Full hard, Soft for cold forming. Hardness as per ... client’s requestForms: Coils, Sheets, strips blue steel strips for rolling shutter part ...