Hardened and tempered spring steel strip for rolling shutter
SPECIFICATION
| Carbon | : | 0.75 - 0.85 % |
| Manganese | : | 0.60 - 0.90 % |
| Silicon | : | 0.35% Max |
| Sulphur | : | 0.04% Max |
| Phosphorus | : | 0.4% Max |
| Hardness | : | 45-48 HRC |
| Tensile Strength | : | 145-160 kg/mm2 |
This strips are used in making springs for aluminum roller shutters and steel rolling shutters Springs made from this steel strips give good and consistent performance in rolling shutter operations Fabricating spring from our hardened and tempered steel strips is easy and does not require additional process of softening were hooks is formed.