... .CK67/CS70/SAE1065 3.professional cutting, polishing,slitting blue steel strips for rolling shutter part Heat treatment is carried out mainly ... Range: 0.15~ 2.5 mmWidth range: 8 ~ 650 mmStandard/quality: DC01, DC03, DC04, DC05, DC06 according to EN Standards ... : Full hard, Soft for cold forming. Hardness as per client’s requestForms: Coils, Sheets, strips blue steel strips for rolling shutter part