Shutter door spring steel strip is a specially alloyed, hardened, and tempered steel (like 65Mn, 70, C75S) designed to provide the high elasticity, strength, and fatigue resistance needed for roller shutter springs, allowing them to store and release energy for smooth door operation without permanent deformation.
- Material Grades: Common choices include 65Mn, 70, 75, 60Si2MnA, C67S, and C75S, noted for their toughness and elasticity.
- Composition: Contains elements like silicon, manganese, chromium, vanadium, and molybdenum to enhance spring properties.
- Properties: High tensile strength, flexibility, fatigue resistance, and ability to return to original shape.
- Hardness: Typically heat-treated to specific hardness levels (e.g., 42-48 HRC or 48-52 HRC) for optimal performance.
Shutter door spring steel strip available in various thicknesses and widths, these strips undergo precise heat treatments to achieve specific hardness (e.g., 42-52 HRC) and are often surface-treated (blued, painted) for durability and rust resistance.
Rolling shutter door spring steel strip refers to a specialized type of Spring steel strip that is used primarily in the manufacture of springs for rolling shutter doors (also known as roll-up doors or sectional doors)
Spring steel strip and Roller Shutter Door Spring undergo a series of processing steps during the manufacturing process, including:
- Cold rolling: The steel plate is rolled into a steel strip of required thickness and width through a cold rolling mill.
- Heat treatment: The hardness and toughness of the steel strip are adjusted through heat treatment processes such as quenching and tempering.
- Surface treatment: such as phosphating, galvanizing, etc., to improve corrosion resistance and surface finish.
Roller Shutter Door Spring parameters
| Material grade | 50# / 65Mn / 1050 / 1060 |
| Surface color | Grey blue, polished blue |
| Hardness | Hardened&tempered 44-46HRC |
| Edge | Round edge, cutting edge |
| Packing Details | 3m,4m,12kg/roll, or as customer’s requirement |
Roller shutter Spring Steel Strip
Common Size of Roller Shutter Spring Steel Strip
| 60 x 1.60 | 50 x 1.50 | 65 x 1.20 | 60 x 1.0 |
| 80 x 1.40 | 45 x 1.50 | 60 x 1.20 | 55 x 1.0 |
| 65 x 1.40 | 60 x 1.30 | 60×1.1 | 55 x 1.20 |
| 50 x 1.0 | 60 x 1.40 | 55 x 1.30 | 50 x 1.20 |
| 45 x 1.0 | 55 x 1.40 | 50 x 1.30 | 45 x 1.20 |
| 40 x 1.0 | 50 x 1.40 | 45 x 1.30 | 40 x 1.20 |
| 45 x 1.40 | 40 x 1.30 | 35 x 1.20 | 45×1.1 |
| 40 x 1.40 | 1.25×50 | 50×11 | 1.4×70 |
The Roller Shutter door spring is a crucial part for the safety and functionality of the roller shutter door, located within the barrel above the door, and is essential for balancing the door for manual or automated use, preventing it from slamming shut or being too heavy to lift.
Rolling shutter door spring steel strip refers to a specialized type of steel strip that is used primarily in the manufacture of springs for rolling shutter doors (also known as roll-up doors or sectional doors).
Post time: Jan-10-2026
