Spring Steel refers to a group of a low alloy, medium carbon steel or high carbon steel with excellent yield strength. Our SMC is the leading manufacturing and supplier of sprig steel products. We use high grade of raw materials to ensure premium quality and high tensile.

A roller shutter, roller door or sectional overhead door is a type of door or window shutter 

consisting of many horizontal slats (or sometimes bars or web systems) hinged together. 

The door is raised to open it and lowered to close it. 

On large doors, the action may be motorized. 

It provides protection against wind and rain.

Specifications of Spring Steel Strip:
1) Grade: 45, 50, 55, 65, 70, 75, 85, 65Mn, 55SiMnV, 60Si2MnA, 60Si2CrA, etc.
2) Thickness: 0.3mm - 2.0mm
3) Width: 30mm - 355mm
4) Hardness: ≥100HV
5) Surface Treatment: grey, blue, bright, bright & grey, bright & blue

Chemical Composition of Spring Steel Strip: 

Grades of Spring Steel Strip: 

Packaging of Spring Steel Strip

Shanghai Metal Products are packed and labeled according to the regulations and customer's requests. Great care is taken to avoid any damage which might be caused during storage or transportation. In addition, clear labels are tagged on the outside of the packages for easy identification of the product I. D. and quality information.

1) Shanghai Metal Standard

2) Customization

Applications of Spring Steel Strip:

Roller shutters have many applications, including doors for vans, garages, kitchens, schools, prisons and warehouses.

In some parts of the world, roller shutters are subsidized by local governments due to the inherent security benefits.

In areas that are frequently exposed to inclement weather,

roller shutters are used as a method of insulation and can protect windows against hail damage.​