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