Guangzhou Cgoodsteel Co.,Ltd`s rolling door springs are well-know good quality for this application. We understand that the flexibility is the key for shutter spring when the door rolling down and rolling up and strip steel can`t be broken when bending. GuangWeiYouLiang, every year, exports hundreds of tons of strip steel worldwide for this use and We have great experience, knowing how to solve these problems and to avoid this problems. From first-rate raw material, cold rolling, quenching and tempering process, de-burring edges, etc, each production step, is checked carefully in width, thickness, hardness, edge as flexibility. Spring steel strip (c67s and c75s and C80) is most suitable for shutter spring material.
blue spring steel + hardened and tempered conditions
Thickness: 1.0mm to 1.6mm thickness
Width: 30mm to 80mm width,
Surface: polish blue, grey blue
MOQ 2tons for each size
good quality and excellent elasticity