应用
spring for roller shutter door
Tolerance
thickness +/-0.01mm max; width +/-0.05mm max
Edge
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