Steel 45G used: for the manufacture of crankshafts, connecting rods, axles, propeller shafts, brake levers, friction disks, gear wheels, spline and gear shafts, anchor bolts.

Note

Structural steel high-quality manganese.

Standards

Name	Code	Standards
Sheets and strips	В23	GOST 103-2006
Bars and shapes	В32	GOST 1051-73, GOST 4543-71, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 10702-78, GOST 14955-77, GOST 1050-2013, TU 14-1-2118-77, TU 14-11-245-88, TU 14-1-1271-75, TU 14-136-367-2008
Bars and shapes	В22	GOST 1133-71, GOST 8319.0-75, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-4944-90
Steel pipes and fittings to them	В62	TU 14-159-179-2003

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	W
GOST 4543-71	0.42-0.5	≤0.035	≤0.035	0.7-1	≤0.3	0.17-0.37	≤0.3	Rest	≤0.3	≤0.05	≤0.03	≤0.15	≤0.2

Fe is the basis.
According to GOST 4543-71 the content in high-quality steel is regulated: P≤0,025%; S≤0.025%; Сu≤0.30%; in high-grade steel: P≤0,025%; S≤0.015%; Сu≤0.25%.

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d₄	d₁₀	y, %	KCU, kJ/m²	HB, MPa
Quenching in oil from 850°C + vacation at 600°C, air cooling
≤25	-	370	620	15	-	-	40	480	-
Quenching in water 840 °C + vacation at 570 °C, air cooling
120	-	450	740	16	-	-	50	59	-
Rod with cross section of 25 mm. Quenching in water from 790 °C to + leave [119]
-	375	1230	1310	-	9	-	42	137	418
Normalization 830 °C (coarse structure)
-	-	370	760	-	-	10	22	-	-
Steel calibrated and calibrated with special surface finish, hot rolled and hot rolled with special surface finish
-	-	-	-	-	-	-	-	-	≤229
Quenching in water 840 °C + vacation at 570 °C, air cooling
200	-	430	740	16	-	-	45	59	-
Rod with cross section of 25 mm. Quenching in water from 790 °C to + leave [119]
-	450	1120	1210	-	11	-	48	383	340
Normalization at 810 °C, air cooling
-	-	460	730	21	-	-	57	540	228
Normalization 830 °C (coarse structure)
-	-	285	740	-	-	20	35	-	-
Annealing: heat to 780 °C at a speed of 340 deg/h, shutter speed, cooling with the furnace at a speed of 40 deg/h.
≤25	-	390	650	23	-	-	50	422	179
Quenching in water 840 °C + vacation at 570 °C, air cooling
240	-	430	740	16	-	-	45	59	-
Rod with cross section of 25 mm. Quenching in water from 790 °C to + leave [119]
-	525	900	1000	-	13	-	51	579	302
Normalization 830 °C (coarse structure)
-	-	265	590	-	-	20	47	-	-
Quenching in water 840 °C + vacation at 570 °C, air cooling
30	-	550	800	18	-	-	55	78	-
Rod with cross section of 25 mm. Quenching in oil from 810 °C to + leave [119]
-	375	-	1280	-	8	-	40	167	351
Normalization 830 °C (coarse structure)
-	-	220	520	-	-	37	52	-	-
Quenching in water 840 °C + vacation at 570 °C, air cooling
50	-	490	760	18	-	-	55	68	-
Rod with cross section of 25 mm. Quenching in oil from 810 °C to + leave [119]
-	525	810	950	-	14	-	52	667	269
Annealed (fine grained structure)
-	-	570	810	-	-	15	40	-	-
Rod with cross section of 25 mm. Quenching in oil from 850 °C + vacation [140]
-	300	600	880	16	-	-	50	383	-
Annealed (fine grained structure)
-	-	460	780	-	-	25	52	-	-
Rod with cross section of 25 mm. Quenching in oil from 850 °C + vacation [140]
-	400	580	880	16	-	-	50	480	-
Annealed (fine grained structure)
-	-	375	640	-	-	25	55	-	-
Rod with cross section of 25 mm. Quenching in oil from 850 °C + vacation [140]
-	500	580	870	18	-	-	51	480	-
Annealed (fine grained structure)
-	-	255	450	-	-	45	60	-	-
Rod with cross section of 25 mm. Quenching in oil from 850 °C + vacation [140]
-	600	500	780	22	-	-	57	667	-

Description mechanical marks

Name	Description
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	Limit short-term strength
d₅	Elongation after rupture
d₄	Elongation after rupture
d₁₀	Elongation after rupture
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number

Technological properties

Name	The value
Weldability	difficult weldability. The welding method of ADS. Recommended preheating and subsequent heat treatment.
Склонность к отпускной хрупкости	malosana [119]
The temperature of forging	Start - 1190 °C, the end - 820 °C.

Steel 45G

Designation

Description