Steel 10G2 (10G2A)

Designation

Name The value
Designation GOST Cyrillic 10Г2
Designation GOST Latin 10G2
Transliteration 10G2
By chemical elements 10Mn2
Name The value
Designation GOST Cyrillic 10Г2А
Designation GOST Latin 10G2A
Transliteration 10G2A
By chemical elements 10Mn2

Description

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 sT|s0,2, MPa σU, 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
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU 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.