Steel 10G2 (10G2A)
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 10Г2 |
| Designation GOST Latin | 10G2 |
| Transliteration | 10G2 |
| The chemical elements | 10Mn2 |
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 10Г2А |
| Designation GOST Latin | 10G2A |
| Transliteration | 10G2A |
| The 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 |
|---|---|---|
| Sectional and shaped rolling | 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 stripes | В33 | GOST 1577-93, TU 14-1-4118-86, TU 14-1-4118-2004 |
| Sectional and shaped rolling | 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 |
| Pipes steel and connecting parts 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 stripes | В23 | GOST 82-70, GOST 19903-74, GOST 103-2006, GOST 19903-90 |
| Metal forming. Forgings | В03 | GOST 8479-70, ST ЦКБА 010-2004 |
| Bulls. Blanks. 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 14-1-4118-2004 | 0.07-0.15 | ≤0.035 | ≤0.035 | 1.2-1.6 | ≤0.3 | 0.17-0.37 | ≤0.3 | The rest | ≤0.3 | - | ≤0.05 | ≤0.03 | ≤0.15 | ≤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 | The 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 | The rest | ≤0.3 | ≤0.008 | - | - | - | - |
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 characteristics
| Section, mm | t отпуска, °C | sT|s0,2, MPa | σB, MPa | d5, % | d4 | d | d10 | y, % | kJ/m2, кДж/м2 | Brinell hardness number, 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 |
|---|---|
| Section | Section |
| sT|s0,2 | Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB | Limit short-term strength |
| d5 | Elongation after rupture |
| d4 | Elongation after rupture |
| d | Elongation after rupture |
| d10 | Elongation after rupture |
| y | The relative narrowing |
| kJ/m2 | Toughness |
Physical characteristics
| Temperature | Е, ГПа | r, кг/м3 | l, Вт/(м · °С) | a, 10-6 1/°С |
|---|---|---|---|---|
| 0 | 204 | 7790 | - | - |
| 20 | 204 | 7790 | - | - |
| 200 | - | - | 38 | - |
| 300 | - | - | 37 | 113 |
| 400 | - | - | 36 | 147 |
| 100 | - | - | - | 113 |
| 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. |
| Propensity to temper brittleness | Tend not. |
| Forging temperature | Start - 1250 °C, end - 800 °C. of the Workpiece cross-section up to 100 mm are cooled in air. |
| Flock-sensitive sensitivity | not sensitive. |