Steel 12Г2С
03CrNiSteel
05G1B steel
06G2AF steel
06G2MFB steel
06G2FR steel
06CGSY steel
Steel 07GBU
Steel 07GFB (07GFB-U)
08G1NFB steel
Steel 08G2MF (08G2MFA)
08G2S steel
08G2SFB steel
Steel 08G2T (08G2T-U)
08G2FBT steel
08GBU steel
Steel 08GBUTR
Steel 09G2
Steel 09G2D
Steel 09G2S (09G2SA)
Steel 09G2SD
Steel 09G2FB (09G2BT)
09GBU steel
09GNFB steel
Steel 09GSNBTs
09CrNi2Ab steel
10G2B steel
Steel 10G2BD
10G2BTU steel
Steel 10G2S1
Steel 10G2S1D
10G2SB steel
10G2SFB steel
10G2T steel
10G2FB steel
10Г2ФБЮ steel
10GNB steel
Steel 10GS2
10GT steel
Steel 10ХГСН1Д (СХЛ-45)
10XDP steel
Steel 10ХН1М (ВК-1А)
10KhNDM steel
10XNDP steel
Steel 10ХСНД (СХЛ-4)
Steel 12G (12GA)
Steel 12G2AF
Steel 12G2B
Steel 12G2S
Steel 12G2SB
Steel 12G2SMF
Steel 12G2SMFAU
12GN2MFAu steel
12NDU steel
Steel 12GS (Sv-12GS)
12GSB steel
12GF steel
12ХГДАФ steel
12HSND steel
Steel 13G1S (13G1S-U)
Steel 13G1SB (13G1SB-U)
13G2AF steel
13GDF steel
Steel 13GS (13GS-U)
Steel 13GF (13GFA)
Steel 14G2
Steel 14G2AF
Steel 14G2AFD
Steel 14GS
Steel 14GF
Steel 14ХГМДЦ
Steel 14KhGS
15Г2АФД steel (15Г2АФДпс)
15G2SF steel
15G2SFD steel
15Г2ФБЮ steel
15GS steel
15GF steel
15GFD steel
15KhDP steel
15HSND steel
Steel 16G (16GA)
16G2AF steel
Steel 16G2AFD
Steel 16G2SF (16G2SAF)
16GD steel
16GMYUCH steel
16GS steel
16GFB steel
Steel 16D
Steel 17G1S (17G1S-U)
Steel 17GS
Steel 18G2AF (18G2AFps)
Steel 18Г2АФД (18Г2АФДпс)
18G2S steel
18YuT steel (Ch-33)
Steel 19YuFT (Ch37)
Steel 1Х2М1
Steel 20G2S
20GS steel
Steel 20GS2
Steel 20GSF (20GSFL)
Steel 20Х2Г2СР
Steel 20KhG2Ts
Steel 20ХГСС2
Steel 22G2
22GYu steel
Steel 22C
Steel 22Kh2G2AU
Steel 22Kh2G2P
Steel 23Cr2G2T
Steel 25G2S
Steel 25GS
Steel 25C2P
Steel 27GS
Steel 28G2S1D
Steel 28G2SFB (28G2SFBD)
Steel 28C
Steel 30HS2
Steel 32G2RPs
Steel 35GS
45KhGMA steel
Steel 80C
Steel SVS-690 (Severstal-690)
X56 steel
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 12Г2С |
| Designation GOST Latin | 12G2C |
| Transliteration | 12G2S |
| The chemical elements | 12Mn2С |
Description
12Г2С steel is used: for the manufacture of electrically welded pipes with a diameter of 530, 720 mm strength group C50 for construction of gas pipelines, oil pipelines and oil product pipelines.
Standards
| Name | Code | Standards |
|---|---|---|
| Pipes steel and connecting parts to them | В62 | GOST 20295-85, GOST 24950-81, TU 14-3-1573-96 |
| Sheets and stripes | В33 | TU 14-1-1921-76, TU 14-1-4323-88, TU 14-1-5241-93 |
| Sheets and stripes | В23 | TU 14-1-3023-80 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | N | As | Ce |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| TU 14-1-1921-76 | 0.1-0.15 | ≤0.035 | ≤0.035 | 1.3-1.65 | ≤0.3 | 0.4-0.6 | ≤0.3 | The rest | ≤0.3 | ≤0.012 | - | ≤0.03 |
| TU 14-3-1573-96 | 0.1-0.15 | ≤0.035 | ≤0.035 | 1.3-1.65 | ≤0.3 | 0.4-0.6 | ≤0.3 | The rest | ≤0.3 | ≤0.012 | - | - |
| TU 14-1-4323-88 | 0.09-0.15 | ≤0.035 | ≤0.04 | 1.3-1.7 | ≤0.3 | 0.5-0.8 | ≤0.3 | The rest | ≤0.3 | - | - | - |
| TU 14-1-5241-93 | ≤0.15 | ≤0.04 | ≤0.04 | ≤1.7 | ≤0.3 | ≤0.8 | ≤0.3 | The rest | ≤0.3 | - | ≤0.08 | - |
Fe is the basis.
According to TU 14-1-1921-76, instead of Ce, Ca ≤ 0.020% can be introduced.
According to TU 14-3-1573-96 carbon equivalent of Se ≤ 0.46%.
According to TU 14-1-4323-88 the chemical composition is given for steel grade 12G2S. For steel smelted with a scroll process, a copper content of up to 0.40% is allowed. In the finished rolled stock, provided mechanical properties are ensured, deviations in chemical composition are allowed in accordance with GOST 5632.
According to TU 14-1-1921-76, instead of Ce, Ca ≤ 0.020% can be introduced.
According to TU 14-3-1573-96 carbon equivalent of Se ≤ 0.46%.
According to TU 14-1-4323-88 the chemical composition is given for steel grade 12G2S. For steel smelted with a scroll process, a copper content of up to 0.40% is allowed. In the finished rolled stock, provided mechanical properties are ensured, deviations in chemical composition are allowed in accordance with GOST 5632.
Mechanical characteristics
| Section, mm | sT|s0,2, MPa | σB, MPa | d5, % | kJ/m2, кДж/м2 |
|---|---|---|---|---|
| Sheet metal as supplied at TU 14-1-5241-93 (samples transverse) | ||||
| 8-50 | ≥285 | ≥450 | ≥21 | - |
| Hot rolled plates for gas pipes (7,5-11,0 mm) TU 14-1-1921-76. Heating to 900-920 °C (exposure for 40 min), air cooling. Group strength C50 | ||||
| ≥345 | ≥490 | ≥22 | ≥390 | |
| The rental in the condition of delivery on the other 14-1-4323-88. In the graph indicated the value of KCU KCU-40 °C/KCU-75 °C | ||||
| ≤10 | ≥345 | ≥490 | ≥21 | ≥390/340 |
| 10-20 | ≥325 | ≥470 | ≥21 | ≥340/290 |
| 20-40 | ≥305 | ≥460 | ≥21 | ≥340/290 |
| 40-60 | ≥285 | ≥450 | ≥21 | ≥340/290 |
| 60-80 | ≥275 | ≥440 | ≥21 | ≥340/290 |
| 80-160 | ≥265 | ≥430 | ≥21 | ≥340/290 |
| ≤10 | ≥375 | ≥510 | ≥20 | ≥390/340 |
| 10-20 | ≥355 | ≥490 | ≥20 | ≥340/290 |
| 20-40 | ≥335 | ≥480 | ≥20 | ≥340/290 |
| ≤10 | ≥345 | ≥490 | ≥21 | ≥390/340 |
| 10-20 | ≥325 | ≥470 | ≥21 | ≥340/290 |
| 20-40 | ≥305 | ≥460 | ≥21 | ≥340/- |
| ≤10 | ≥375 | ≥510 | ≥20 | ≥390/340 |
| 10-20 | ≥355 | ≥490 | ≥20 | ≥340/290 |
| 20-40 | ≥335 | ≥480 | ≥20 | ≥340/- |
| Longitudinal electric-welded pipes of oil and gas as delivered at TU 14-3-1573-96 (samples transverse; column cross section - outer diameter. wall thickness; in the graph the value is KCU KCU-40 °C) | ||||
| 1020 (10-12) | ≥340 | ≥490 | ≥20 | ≥294 |
| 530, 630, 720 (11-12) | ≥340 | ≥490 | ≥20 | ≥392 |
| 530, 630, 720 (7-10) | ≥340 | ≥490 | ≥20 | ≥294 |
| 820 (9-12) | ≥340 | ≥490 | ≥20 | ≥294 |
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 |
| kJ/m2 | Toughness |
