Blue shutter spring steel strip(hardened and tempered)
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 month, 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.Our customer from S/N America, Eastern Europe, Middle East over 40 countries.
Clients prefer specifications requirements as below or customized:
I. Material grade: c67s, c75s 60Si2Mn,
II. Surface: blue
III.Specification:
Thickness: 1.20- 1.70mm
Width: 30-70mm
IV. Packing:
Coil weight: 80-150 kg Coil ID: 400 mm Coil OD: 650 mm
Per pallet weight: 2.0-2.5 tonnes
Each coil packed by steel strapping, with light oil then wrapped with water-proof compound paper, 8-15 coils put on metal pallet for standard seaworthy transportion.
