Rolling shutter door spring steel band

Rolling shutter door spring steel band,which is made with the best raw material by doing the process of cold rolled,annealed,heating treatment with hardened and tempered,and through controlling heating and colling process.GuangWeiYouLiang is leading manufacturer in this steel strip for rolling shutter door spring and well known high quality,from fist-rate crude material,cold rolling,hardening and tempering process,rounded edge.etc,by controlling strictly for each production line,is check carefully in width,thickness,hardness,edge as flexibility.etc.and in this way can make the propertites of these steel strip are high strength,good toughness and abrasion,and it is better used for rolling shutter door springs,rolling door springs,band springs.so the spring steel band(DIN CK67/CK70/CK75)is most suitable for rolling shutter door spring material