slit edge; both rounded; one side round, one side slit; square etc
Heat Treatment
Quenching+Tempering
spring szie
1.0-1.6*40-70mm
Certificate
ISO9001:2008/BV/S.GS
Material
ck67, c67s, SAE 1070
Product Name
SAE 1070 Blue Tempered Spring Steel for Rolling Shutter Door
key words
ressort rideau metallique
Packaging and delivery
Packaging Details
SAE 1070 Blue Tempered Spring Steel for Rolling Shutter Door 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.