C40 – مجتمع صنعتی اسفراین

1.0511

C40

This steel is a Heat-treatable steel for primary forming into wrought products. Cited properties is appropriate for the normalized condition. It has a low thermal conductivity among wrought carbon or non-alloy steel. In addition, it has a moderately low ductility and a moderately high tensile strength.

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
Standard Designation	Grade, Class, Type, Symbol or Name	Steel Number	UNS Number	Product Form/Heat Treatment	t, mm	t, in.	N/mm² or MPa	ksi	N/mm² or MPa	ksi	Elongation, min, %	Other
EN 10250-2:1999	C35E	1.1181	—	QT	≤ 70	—	320	—	550	—	20	35 J at 23°C
					70 < t ≤ 160	—	290	—	490	—	22	31 J at 23°C
					160 < t ≤ 330	—	270	—	470	—	21	25 J at 23°C
	C40	1.0511	—	N or NT	≤ 100	—	290	—	550	—	17	—
	C40	1.0511	—	N or NT	100 < t ≤ 250	—	260	—	530	—	17	—

Composition:

%C	%Si	%Mn	%P	%S	%Cr	%Mo	%Ni	% Others
0,37-0,44	≤0,40	0,50-0,80	0,045	0,045	≤0,40	0,10	≤0,40	Cr+Mo+Ni ≤ 0,63

Hot working:

Forging temperature range: 1100-850℃

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 ℃
650-700	197	850-880	830-860	840-870	540-680

Main application:

Forged and welded mech. engineering components

Shape of product:

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