Shutter Doors Spring Steel Strip






Grey blue steel strip for rolling shutter doors spring using
1.Grade: 65Mn,#50,#40,CK50 CK55 CK60 CK67 CK70 C75 Cr1
2.Thickness: 1.0mm, 1.1mm, 1.2mm, 1.25mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm
3.Width: 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 70mm, 80mm
4.Surface: grey blue, polished blue,black,white polished
5.Edge: both rounded edge or slit edge
6.Hardness: HRC44-49
Packing each bundle with anti-rust paper and light oil then wrapped in plastic film or hessians cloth with metallic pallet and put in 20ft or standard sea worthy.
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