Steel 50G used: for the manufacture of friction discs, shafts, gears, spline shafts, connecting rods, camshaft rollers, bushings bearings, cranks, spindles, rims, flywheels, crankshafts of diesel engines and gas engines and other details and requirements for high strength and wear resistance; hot-rolled flat towpath profile for agricultural machines; springs and measuring tapes.

Note

Structural steel high-quality manganese.

Standards

Name	Code	Standards
Bars and shapes	В22	GOST 1133-71, GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 8319.0-75, GOST 9234-74, GOST 11474-76, GOST 12492.6-90, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Sheets and strips	В33	GOST 1577-93
Tape	В34	GOST 2283-79, GOST 10234-77, TU 3-1509-88
Bars and shapes	В32	GOST 4543-71, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, GOST 1050-2013, TU 14-1-1601-75, TU 14-1-2118-77, TU 14-1-2490-78, TU 14-11-245-88, TU 14-1-1271-75, TU 14-1-5228-93, TU 14-136-367-2008
Sheets and strips	В23	GOST 82-70, GOST 19903-74, GOST 19903-90
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-4944-90

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	W
GOST 4543-71	0.48-0.56	≤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	d	d₁₀	y, %	KCU, kJ/m²	HB, MPa
Tape flatted average strength of 0.1-4.0 mm according to GOST 10234-77 in the state of delivery (indicated delivery)
-	-	-	780-1270	-	-	-	-	-	-	-
-	-	-	780-930	-	-	-	-	-	-	-
-	-	-	930-1080	-	-	-	-	-	-	-
-	-	-	1080-1230	-	-	-	-	-	-	-
-	-	-	≤780	-	-	≥10	-	-	-	-
-	-	-	≤570	-	-	-	-	-	-	-
Quenching in water 840 °C + vacation at 560-580 °C, air cooling (named place of clippings sample)
120	-	470	760	-	-	-	-	-	-	-
Quenching in water 840 °C
-	540	740	880	17	-	-	-	50	-	260
Normalization at 830 °C, air cooling (coarse structure)
-	-	370	760	-	-	-	10	22	-	-
Quenching in water 840 °C + vacation at 560-580 °C, air cooling (named place of clippings sample)
160	-	470	760	-	-	-	-	-	-	-
Quenching in water 840 °C
-	580	680	810	18	-	-	-	52	-	235
Normalization at 830 °C, air cooling (coarse structure)
-	-	285	740	-	-	-	20	35	-	-
Quenching in water 840 °C + vacation at 560-580 °C, air cooling (named place of clippings sample)
240	-	450	760	-	-	-	-	-	-	-
Quenching in water 840 °C
-	620	600	750	22	-	-	-	56	-	220
Normalization at 830 °C, air cooling (coarse structure)
-	-	260	590	-	-	-	20	47	-	-
Quenching in water 840 °C + vacation at 560-580 °C, air cooling (named place of clippings sample)
120	-	510	800	-	-	-	-	-	-	-
Normalization at 830 °C, air cooling (coarse structure)
-	-	220	520	-	-	-	37	52	-	-
Quenching in water 840 °C + vacation at 560-580 °C, air cooling (named place of clippings sample)
160	-	510	800	-	-	-	-	-	-	-
Annealed (fine grained structure)
-	-	570	810	-	-	-	15	40	-	-
Quenching in water 840 °C + vacation at 560-580 °C, air cooling (named place of clippings sample)
240	-	490	780	-	-	-	-	-	-	-
Annealed (fine grained structure)
-	-	460	780	-	-	-	25	52	-	-
Cold-rolled steel strip of 0.1-4.0 mm according to GOST 2283-79 on delivery
0.1-4	-	-	740-1180	-	-	-	-	-	-	-
Quenching in water 840 °C + vacation at 560-580 °C, air cooling (named place of clippings sample)
120	-	450	740	16	-	-	-	50	-	-
Annealed (fine grained structure)
-	-	375	640	-	-	-	25	55	-	-
Cold-rolled steel strip of 0.1-4.0 mm according to GOST 2283-79 on delivery
0.1-1.5	-	-	≤640	-	≥15	-	-	-	-	-
Quenching in water 840 °C + vacation at 560-580 °C, air cooling (named place of clippings sample)
160	-	430	740	16	-	-	-	45	-	-
Annealed (fine grained structure)
-	-	255	450	-	-	-	45	60	-	-
Cold-rolled steel strip of 0.1-4.0 mm according to GOST 2283-79 on delivery
1.5-4	-	-	≤740	-	≥10	-	-	-	-	-
Quenching in water 840 °C + vacation at 560-580 °C, air cooling (named place of clippings sample)
240	-	430	740	16	-	-	-	45	-	-
Cold-rolled steel strip of 0.1-4.0 mm according to GOST 2283-79 on delivery
0.1-1.5	-	-	≤610	-	≥15	-	-	-	-	-
Quenching in water 840 °C + vacation at 560-580 °C, air cooling (named place of clippings sample)
30	-	550	800	18	-	-	-	55	-	-
Cold-rolled steel strip of 0.1-4.0 mm according to GOST 2283-79 on delivery
1.5-4	-	-	≤610	-	≥13	-	-	-	-	-
Quenching in water 840 °C + vacation at 560-580 °C, air cooling (named place of clippings sample)
50	-	490	760	18	-	-	-	55	-	-
Rod. Quenching in water 840 °C + Vacation at 560-580 °C, air cooling
25-30	-	550	800	18	-	-	-	55	780	-
Quenching in water 840 °C + vacation at 560-580 °C, air cooling (named place of clippings sample)
80	-	470	740	18	-	-	-	50	-	-
Rod. Quenching in water 840 °C + Vacation at 560-580 °C, air cooling
30-50	-	490	760	18	-	-	-	55	680	-
50-80	-	470	740	18	-	-	-	50	590	-
Rod. Quenching in oil from 850 °C + Vacation at 600 °C, air cooling
25	-	390	650	13	-	-	-	-	-	-

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
d	Elongation after rupture
d₁₀	Elongation after rupture
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number

Physical characteristics

Temperature	Е, HPa	G, HPa	r, kg/m³	l, W/(m · °C)	a, 10^-6 1/°C	С, J/(kg · °C)
20	216	-	7810	43	-	-
300	199	77	-	38	132	517
400	185	73	-	36	138	533
800	130	50	-	28	151	609
1000	-	-	-	-	123	676

A description of the physical symbols

Name	Description
Е	The normal elasticity modulus
G	Modulus of elasticity shear torsion
r	Density
l	Coefficient of thermal conductivity
R	UD. the resistivity
a	The coefficient of linear expansion
С	Specific heat

Technological properties

Name	The value
Weldability	Difficult weldability. Welding methods: RDS - necessary heating and subsequent heat treatment. The CCC without restriction.
Склонность к отпускной хрупкости	Inclined at 1.0 % Mn.
The temperature of forging	Start - 1250 °C, the end - 780 °C. of the Workpiece cross-section up to 400 mm are cooled in air.
Flock-sensitive sensitivity	Sensitive.
Machinability	In the hot rolled condition when blower SB 202 and HB=710 MPa Kn TV.SPL.=0,90.

Steel 50G

Designation

Description