Material number 1.7709     -     21CrMoV5-7

 
Composition in % :

C

Si

Mn

P

S

Cr

Mo

Ni

0,17 - 0,25

max. 0,40

0,40 - 0,80

max. 0,025

max. 0,030

1,20 - 1,50

0,55 - 0,80

max. 0,60

V

W

Ti

Cu

Al

Nb

B

N

0,20 - 0,35

 

 

 

max. 0,03

 

 

 


Range of application and heat treatment :

Structural steel : creep resistant screws and nuts 
Hardening : 890 - 940 °C (oil or air)          Soft annealing : 650 - 730 °C 

General and distinctive features :

 
 

Material selection

Analyses selection

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