Steel 10G2 is used: for the manufacture of fasteners and other parts operating at temperatures from -70 °C under pressure; details of pipeline valves after quenching and tempering; steel structures; welded crossings of the AC; cold-resistant seamless hot-deformed pipes for gas-lift systems and construction of gas fields.

Note

Steel structural quality manganese.
To obtain high-quality welded joints requires additional operations: heating up to 200−300 °C during welding and heat treatment (annealing) after welding.

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 2590-2006, GOST 2591-2006, GOST 2879-2006
Sheets and strips	В33	GOST 1577-93, TU 14-1-4118-86, TU 14-1-4118-2004
Bars and shapes	В32	GOST 4543-71, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, GOST 1050-2013, TU 14-1-2118-77, TU 14-11-245-88, TU 14-1-1271-75, TU 14-1-5228-93, TU 14-136-367-2008
Steel pipes and fittings to them	В62	GOST 550-75, GOST 8732-78, GOST 8734-75, GOST 9567-75, GOST 21729-76, GOST 23270-89, GOST 24950-81, GOST 30563-98, GOST 30564-98, GOST 8733-87, GOST 8731-87, GOST Р 53383-2009, HUNDRED 79814898 105-2008, TU 14-3-1128-2000, TU 14-3-1393-86, TU 14-3-1577-88, TU 14-3-492-76, TU 14-3-463-2005, TU 14-159-1128-2008, TU 14-3-1128-2005, TU 14-3Р-1128-2007, TU 14-3-1128-82, TU 14-3-1654-89
Sheets and strips	В23	GOST 82-70, GOST 19903-74, GOST 103-2006, GOST 19903-90
Processing of metals by pressure. Forgings	В03	GOST 8479-70, ST ЦКБА 010-2004
Blanks. Of the workpiece. Slabs	В31	OST 14-21-77, OST 3-1686-90, TU 14-1-4944-90, TU 26-0251-16-78
Thermal and thermochemical treatment of metals	В04	ST ЦКБА 026-2005

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	V	Ti	Mo	W
TU 14-3-1128-82	0.07-0.15	≤0.025	≤0.025	1.2-1.6	≤0.25	0.17-0.37	≤0.25	Rest	≤0.2	-	-	-	-	-
TU 14-1-4118-2004	0.07-0.15	≤0.035	≤0.035	1.2-1.6	≤0.3	0.17-0.37	≤0.3	Rest	≤0.3	-	≤0.05	≤0.03	≤0.15	≤0.2
GOST 21729-76	0.08-0.15	≤0.035	≤0.035	1.2-1.6	≤0.25	0.17-0.37	≤0.25	Rest	≤0.2	-	-	-	-	-
TU 14-159-1128-2008	0.07-0.15	≤0.025	≤0.03	1.2-1.6	≤0.3	0.17-0.37	≤0.3	Rest	≤0.3	-	≤0.05	≤0.03	≤0.15	≤0.2
TU 14-3Р-1128-2007	0.07-0.15	≤0.025	≤0.025	1.2-1.6	≤0.3	0.17-0.37	≤0.3	Rest	≤0.3	≤0.008	-	-	-	-

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%.
According to GOST 30563-98, GOST 30564-98, TU 14-159-1128-2008, TU 14-3R-1128-2007, TU 14-3-1128-82 and OST 14-21-77 the chemical composition is given for high-quality steel grade 10G2A.

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
Tubes seamless cold - and hot-deformed in the delivery condition heat-treated (NV - wall > 10 mm)
	-	≥245	≥421	≥22	-	-	-	≥50	≥1180	≤197
	-	≥265	≥421	≥21	-	-	-	≥50	≥1180	≤197
Pipe seamless cold drawn, cold rolled and toplocatie, heat-treated in the delivery condition according to GOST 21729-76
	-	-	≥421	≥22	-	-	-	-	-	-
Blank pieces of pipe armature from rolled and stamped. Annealing in air from 910-930 °C (exposure for 2.5-4.0 hours depending on the thickness and weight of the workpiece)
≤100	-	≥215	≥430	≥22	-	-	-	≥53	≥539	123-167
Rolled steel. Normalization (longitudinal samples)
≤100	-	≥215	≥430	≥24	-	-	-	≥53	≥540	123-167
Rolled steel. Quenching in water from 880-900 °C to + Leave (longitudinal samples)
-	200	≥780	≥930	≥13	-	-	-	≥40	-	≥350
Rolled steel. Normalization at 900 °C, air cooling (longitudinal samples)
-	-	≥265	≥460	-	-	≥31	-	-	-	-
Blank pieces of pipe armature from rolled and stamped. Annealing in air from 910-930 °C (exposure for 2.5-4.0 hours depending on the thickness and weight of the workpiece)
≤200	-	≥215	≥430	≥20	-	-	-	≥48	≥441	123-167
Rolled steel. Normalization (longitudinal samples)
100-300	-	≥215	≥430	≥20	-	-	-	≥48	≥490	123-167
Rolled steel. Quenching in water from 880-900 °C to + Leave (longitudinal samples)
-	300	≥680	≥850	≥14	-	-	-	≥50	-	≥330
Rolled steel. Normalization at 900 °C, air cooling (longitudinal samples)
-	-	≥225	≥390	-	-	≥27	-	-	-	-
Blank pieces of pipe armature from rolled and stamped. Annealing in air from 910-930 °C (exposure for 2.5-4.0 hours depending on the thickness and weight of the workpiece)
≤400	-	≥215	≥430	≥18	-	-	-	≥40	≥392	123-167
Rolled steel. Normalization (longitudinal samples)
300-500	-	≥215	≥430	≥18	-	-	-	≥40	≥440	123-167
Rolled steel. Quenching in water from 880-900 °C to + Leave (longitudinal samples)
-	400	≥590	≥760	≥18	-	-	-	≥59	-	≥240
Rolled steel. Normalization at 900 °C, air cooling (longitudinal samples)
-	-	≥175	≥295	-	-	-	-	-	-	-
Blank pieces of pipe armature from rolled and stamped. Annealing in air from 910-930 °C (exposure for 2.5-4.0 hours depending on the thickness and weight of the workpiece)
≤800	-	≥215	≥430	≥16	-	-	-	≥35	≥343	123-167
Rolled steel. Quenching in water from 880-900 °C to + Leave (longitudinal samples)
-	500	≥580	≥680	≥21	-	-	-	≥65	-	≥200
Rolled steel. Normalization at 900 °C, air cooling (longitudinal samples)
-	-	≥115	≥160	-	-	≥36	-	-	-	-
Flats on the other 14-1-4118-2004
	-	-	390-570	-	≥20	-	≥22	-	-	-
Rolled steel. Quenching in water from 880-900 °C to + Leave (longitudinal samples)
-	600	≥570	≥660	≥23	-	-	-	≥65	-	≥170

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	r, kg/m³	a, 10^-6 1/°C
0	204	7790	-
20	204	7790	-
600	-	-	147

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	Welded without any restrictions. Welding methods: SMAW, ADS submerged arc and gas protection electroslag welding.
Склонность к отпускной хрупкости	Tend not.
The temperature of forging	Start - 1250 °C, end - 800 °C. of the Workpiece cross-section up to 100 mm are cooled in air.
Flock-sensitive sensitivity	not sensitive.

Steel 10G2 (10G2A)

Designation

Description