coil sping
1.Certification:ISO9001:2000/TS16949
2.heat treating
3.quenching tempering
coil sping :
1.We pass the Iss the ISO9001 QUALITY CONTROL SYSTEM CERTIFICAT
2.Our spring have enough intensity,flexibility and durability.
3.Its period of validity is one year.
4.The material is 60Si2MnA
5.Fatigue test
6.HRC:46-52DEGREE
7.Wire diameter:8-50mm
8.Usage:automotive\auto\car
9.style:coil
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