High tensile spring steel strip for rolling up doors spring
Material: c67s, c70s,c75s,c80s,c75cr1
Thickness of strip: 1.2mm,1.3mm,1.4mm,1.5mm,1.6mm,1.8mm
Width: 40mm,45mm,50mm,55mm,60mm,70mm,80mm
Hardness: 45-48hrc
Surface: grey blue
Edge: rounded
Tensile strength: 1450-1470mpa
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