C67 rolling shutter door band spring

Zhou Cgood Steel Co., Ltd steel strip for shutter spring is well-know good quality for rollin shuter 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. Every year, we export hundreds of tons of strip steel worldwide for this use and We have great and full 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 and flexibility. Spring steel strips ( material grade c67s and c75s) are most suitable for making shutter spring.

 

60x1.60    60x1.50    65x1.20    60x1.0

80x1.40    50x1.50    60x1.20    55x1.0

65x1.40    45x1.50    55x1.20    50x1.0

60x1.40    60x1.30    50x1.20    45x1.0

55x1.40    55x1.30    45x1.20    40x1.0

50x1.40    50x1.30    40x1.20    30x1.0

45x1.40    45x1.30    35x1.20  

40x1.40    40x1.30