Composition in % :
|
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
|
0,65 - 0,72 |
0,15 - 0,35 |
0,60 - 0,90 |
max. 0,035 |
max. 0,035 |
|
|
|
Range of application and heat treatment :
|
Spring steel : precision springs
Hardening : 815 - 845 °C (oil) Soft
annealing : 650 - 690 °C Normalising
: 820 - 850 °C |
General and distinctive features :
|