hardened and tempered steel strip for rolling shutter spring

Specifications

1. Good flatness
2. Good straightness
3. Good round edge
4. Uniform hardness
5. Good and uniform color

Rolling Shutter Spring Steel Strip 

1. Material: C75, C67, 65Mn, 50# 

2. Finish: Tempered and hardened, black / blue finished, round edge 

3. HRC46-48 

4. Size: 1.0-1.6 mm thickness 40-100mm width 3-6m length 

5. MOQ: 5ton 

6. Delivery time: 30days upon receipt of your deposit

 

Below is our Grey blue color

 

 

 

And this is polished blue color

 

 

Below pictures show our good round edges