CK67 C67S carbon spring steel strip for rolling shutter door

C67S CK67 pring steel strip coils for rolling shutter door
CK67 C67S used as steel for valve springs, coupling springs, shock absorbers, tool steel for i.e. punches, rakes, chisels, flat springs,
adjustable steel washers, and other spring elements.C67S steel is non-weldable, prone to decarburization and oxidation during heat treatment.
It is the most suitable material for making high flexiable rolling shutter spring steel coils;

Steel Grade  C67S, Ck67,1.1231,
Thickness most used:  1.0,1.1,1.2,1.25,1.3,1.4mm
Width most used: 40,45,50,60,63,70mm
Hardness Hardened and tempered steel strip: 46-48HRC
Surface :  blue,black

Edge:  Slit, Both round edge,