Steel 16G2AF
Designation
| Name | The value |
|---|---|
| Designation GOST Cyrillic | 16Г2АФ |
| Designation GOST Latin | 16G2AF |
| Transliteration | 16G2AF |
| The chemical elements | 16Mn2NV |
Description
16G2AF steel is used: for the manufacture of steel structures, welded farm and other machinery; electric-welded pipes with a diameter of 127, 140, 152, 159, 168, 219, 273 mm for building; casings of blast furnaces.
Note
Steel low alloy manganese vanadium with nitrogen. The degree of deoxidation - SP.
16G2AF steel provides strength grade sheet, universal broadband rental and roll-formed profiles KP 390 with plate thickness of 32 to 40 mm., CP 440 with a thickness up to 32 mm. without the use of additional hardening treatment.
Standards
| Name | Code | Standards |
|---|---|---|
| Classification, nomenclature and general norms | В20 | GOST 19281-89 |
| Pipes steel and connecting parts to them | В62 | GOST 20295-85, GOST 24950-81, TU 14-3-567-76, TU 14-3-67-72 |
| Sheets and stripes | В23 | GOST 82-70, GOST 19903-74, GOST 19282-73, GOST 19903-90, TU 14-1-1175-74, TU 14-1-4632-93, TU 14-1-5507-2005 |
| Sectional and shaped rolling | В22 | GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 9234-74, GOST 11474-76, TU 14-1-1762-76 |
| Sheets and stripes | В33 | TU 14-1-1779-76, TU 14-1-4431-88, TU 14-1-219-72 |
| Sectional and shaped rolling | В32 | TU 14-136-367-2008 |
Chemical composition
| Standard | C | S | P | Mn | Cr | Si | Ni | Fe | Cu | N | As | Al | V | Ti |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GOST 19282-73 | 0.14-0.2 | ≤0.04 | ≤0.035 | 1.3-1.7 | ≤0.4 | 0.3-0.6 | ≤0.3 | The rest | ≤0.3 | 0.015-0.025 | ≤0.08 | ≤0.05 | 0.08-0.14 | ≤0.03 |
| TU 14-1-5507-2005 | 0.14-0.18 | ≤0.006 | ≤0.012 | 1.3-1.7 | ≤0.4 | 0.2-0.5 | ≤0.3 | The rest | ≤0.3 | 0.015-0.025 | - | - | 0.08-0.14 | - |
| TU 14-1-219-72 | 0.14-0.2 | ≤0.04 | ≤0.035 | 1.3-1.7 | ≤0.4 | 0.4-0.7 | ≤0.3 | The rest | ≤0.3 | 0.015-0.03 | - | - | 0.08-0.18 | - |
According to GOST 19282-73 chemical analysis of steel grade 16G2AF is presented. Modification of steel by calcium and rare earth elements is allowed from the calculation of the introduction into the metal of not more than 0.02% calcium and 0.05% rare earth elements.
According to GOST 19281-89 and GOST 19282-73, it is allowed to add aluminum and titanium from the calculation of the mass fraction in the rolled aluminum - no more than 0.050%, titanium - no more than 0.030%.
According to TU 14-1-1762-76 chemical analysis of steel grade 16G2AF is presented.
According to TU 14-1-219-72 chemical analysis of steel grade 16G2AF on a ladle sample is presented. The nitrogen content is calculated.
According to TU 14-1-5507-2005 chemical analysis of 16G2AF-III grade steel is presented.
Mechanical characteristics
| Section, mm | sT|s0,2, MPa | σB, MPa | d5, % | d | y, % |
|---|---|---|---|---|---|
| Sheets and strips (samples transverse) | |||||
| 32-50 | ≥410 | ≥570 | ≥20 | - | - |
| The hot rolled band roll as supplied on the other 14-1-219-72 | |||||
| - | ≤441 | ≤637.6 | - | ≥16 | - |
| The plates and universal broadband in the state of delivery GOST 19282-73 | |||||
| 32-50 | ≥410 | ≥570 | ≥20 | - | - |
| Sheets and strips (samples transverse) | |||||
| 32 | ≥440 | ≥590 | ≥20 | - | - |
| The plates and universal broadband in the state of delivery GOST 19282-73 | |||||
| 5-32 | ≥440 | ≥590 | ≥20 | - | - |
| Steel hot rolled as supplied on the other 14-1-1762-76 | |||||
| 6-9 | ≤440 | ≤686 | ≥20 | - | - |
| Rolled plates in the state of delivery on the other 14-1-5507-2005. Normalization of the plates with a thickness up to 60 mm. Protivosokova processing sheets with a thickness over 60 mm. In the graph, the relative narrowing of the given parameter relative narrowing across rolling/in the direction of thickness of the sheet | |||||
| 25-32 | ≥440 | ≥590 | ≥25 | - | ≥60/30 |
| 33-50 | ≥410 | ≥570 | ≥25 | - | ≥60/30 |
| 51-100 | ≥390 | ≥490 | ≥25 | - | ≥60/30 |
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 |
| d | Elongation after rupture |
| y | The relative narrowing |
Technological properties
| Name | The value |
|---|---|
| Weldability | Welded without any restrictions. |
| Macrostructure and contamination | The macrostructure of the leaves on the other 14-1-5507-2005, check for the etched cross Templeton, length not less than 100 mm should not be visible without using the magnifying devices of the traces of shrinkage looseness, blistering, delamination, cracks, inclusions and Kramatorsk, as well as placenow. |
| Shock bend | Rolled plates with a thickness of 25-100 mm shall be tested for impact strength. Impact strength when tested must be: KCU-40°C ≥ 980 kJ/m2, KCU-70°C ≥ 290 kJ/m2, KCV-40°C ≥ 390 kJ/m2. |