1.7218

4130

 
a

This grade is medium-carbon, chromium-molybdenum steel. Available as hot worked and cold finished bar and seamless tube, this steel is intended for general purpose applications. Variations in heat treatment can obtain a broad range of strength and toughness. This steel has good hardenability, strength, wear resistance, toughness, and ductility. In the heat treated condition, they offer good strength and toughness for moderately stressed parts. This grade is available in forging quality, aircraft quality, and premium aircraft quality steel.

 

Standard Designation	Grade, Class, Type, Symbol or Name	Steel Number	UNS Number	Product Form/Heat Treatment	Thickness		Yield Strength, min		Tensile Strength, min		Elongation, min, %	Other
					t, mm	t, in.	N/mm2 or MPa	ksi	N/mm2 or MPa	ksi
EN 10250-3:1999	25CrMo4	1.7218	—	QT	≤ 70	—	450	—	700	—	15	50 J at RT
					70 < t ≤ 160	—	400	—	650	—	17 L; 13 T	L: 45 J at RT T: 27 J at RT
					160 < t ≤ 330	—	380	—	600	—	18 L; 14 T	L: 38 J at RT T: 22 J at RT

 

Composition:

 

%C	%Si	%Mn	%P	%S	%Cr	%Mo	%Ni	%Others
0,22-0,29	≤0,40	0,60-0,90	0,035	0,035	0,90-1,20	0,15-0,30	–	–

 

Hot working:

Forging temperature range: 1100-850℃
 
Note: Heat to 1240 ℃. 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	212	860-900	840-870	850-880	540-680

 

Main application:

Bushes, arbors, control components, links
 
Shape of product:

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