... 3.professional cutting, polishing,slitting blue steel strips for rolling shutter part Heat treatment is carried out mainly ... sheet thickness, improving surface finishing, preparing the surface for coating and providing a range of tempers.Cold rolled ... EK4Finishes: Bright, blue, polish blueEdge: Mill, Slit, RoundTempers: Full hard, Soft for cold forming. Hardness as per client’s requestForms: Coils ...