Sell high carbon steel for rolling shutter spring

Description

high carbon steel for rolling shutter spring : ***** grade:CK*0/CK*0/CK*7/CK*0/CK*5, C*5Cr1, *0CrV4, *0Si2Mn. *****:0.*5mm- 2.5mm 3.Width:8mm***0mm ***** fo steel:slit, round, square. 5.Surface treatment: heat treatments. 6.Standard of reference:GB, DIN, JIS. ***** surface:Polished , blue, yellow, white, gery-blue, black, bright, nature. *****:Thickness+/*0.*1 mm max, width:+/*0.*5mm max 9.useful:, material used in rolling shutter spring , rolling door, band saw, putty, shoe material accessories, shoe toe cup, shoe shank , hooks , knift , spring clips, autoparts, constant force spring, clock main spring, toy spring , power spring, steel for clock spring, power springs, recliner spring, feeler gauges, doctor blades *0.Hardness:****8HRC for cold rolled process, ****5HRC for hardened and tempered process, below *0Hrc for annealed process. *1.Packing: Each coil with anti-rust paper wrapped and plastic film with material pallet and put into *0ft container or standard sea worthy. ***** flatness, and hardness uniform