polished (blue, yellow, white, grey-blue, black, bright) or Nature etc
Hardness
<20hrc, 20-30hrc, 30-55hrc
Tolerance
thickness +/-0.01mm max; width +/-0.05mm max
Edge
round, both round
Heat Treatment
Quenching+Tempering
Process
Tempered Steel Strip
Certificate
ISO9001:2008/SG-S/BV
Material
hardened tempered coil for cold rolled steel
Product Name
roller door accessories CK67 steel band metal spring
Packing
Hardened and tempered spring steel 65Mn
Packaging and delivery
Packaging Details
roller door accessories CK67 steel band metal spring for rolling shutter in packing 1.each bundle with anti-rust paper and light oil then wrapped in plastic film 2.put in 20ft container for standard sea worthy.