1.7220 34CrMo4

 

This grade is used in the following applications: forgings for thin-walled pressure vessels; wire for production of high strength bolts, screws, and recessed- and socket-head screws; and nitrided parts.
 
Composition:

 

%C %Si %Mn %P %S %Cr %Mo %Ni  % Others
0,30-0,37 ≤0,40 0,60-0,90 0,035 0,035 0,90-1,20 0,15-0,30

 

Hot working:

Forging temperature range: 1200-850℃
 
Note: Heat to 1200 ℃. Do not forge below 850.

Heat treatment:

 

Soft annealing ℃ HB 30-soft annealed Normalizing ℃ Hardening temperature for quenching in Water ℃ Hardening temperature for quenching in Oil ℃ Tempering temperature ℃
680-720 223 850-890 830-860 840-870 540-680

 

Main application:

Crankshafts, axle arbors
 
Shape of product:

Round, flat, step shape, ring, disc, shaft, other shape depend on customer needs