Steel 14G2AF
Designation
| Name |
The value |
| Designation GOST Cyrillic |
14Г2АФ |
| Designation GOST Latin |
14G2AF |
| Transliteration |
14G2AF |
| The chemical elements |
14Mn2NV |
Description
Steel 14G2AF used: for the manufacture of metal in the construction of industrial buildings, production farms of the crane bridge cranes; flange joints of roof trusses.
Note
Steel low alloy manganese vanadium with nitrogen. The degree of deoxidation — SP.
Steel 14G2AF provides strength grade sheet, universal broadband rental and roll-formed profiles KP KP 375 and 390 with plate thickness of up to 50 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 |
| 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 |
| Sectional and shaped rolling |
В22 |
GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 9234-74, GOST 11474-76 |
| Welding and cutting of metals. Soldering, riveting |
В05 |
OST 36-58-81 |
| Sectional and shaped rolling |
В32 |
TU 14-1-1271-75, TU 14-136-367-2008 |
| Sheets and stripes |
В33 |
TU 14-105-465-88, TU 14-1-4431-88, TU 14-105-465-82 |
| Bulls. Blanks. Slabs |
В31 |
TU 14-229-289-90 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
N |
As |
Al |
V |
Ti |
Ca |
| GOST 19282-73 |
0.12-0.18 |
≤0.04 |
≤0.035 |
1.2-1.6 |
≤0.4 |
0.3-0.6 |
≤0.3 |
The rest |
≤0.3 |
0.015-0.025 |
≤0.08 |
≤0.05 |
0.07-0.12 |
≤0.03 |
- |
| TU 14-105-465-82 |
0.12-0.18 |
≤0.02 |
≤0.02 |
1.2-1.6 |
≤0.4 |
0.3-0.6 |
≤0.3 |
The rest |
≤0.3 |
0.015-0.025 |
≤0.08 |
0.02-0.05 |
0.07-0.12 |
≤0.03 |
≤0.06 |
Fe is the basis.
According to GOST 19282-73, it is allowed to modify steel with calcium and rare-earth elements from the calculation of the introduction of not more than 0.02% calcium and 0.05% rare-earth elements into the metal.
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 14-105-465-82 in the steel grade 14G2AF, a technological addition of calcium is added to 0.060% by calculation. It is allowed to use the REM in an amount up to 0.10% (calculated). Permissible deviations in chemical composition in accordance with GOST 19282.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
| Rolled steel. Normalization |
| 4 |
- |
≥550 |
≥20 |
- |
| The plates and universal broadband in the state of delivery GOST 19282-73 |
| 5-50 |
≥390 |
≥540 |
≥20 |
- |
| Normalization |
| 14 |
470-485 |
620-630 |
24 |
- |
| Sheets with a thickness of 20 mm. Normalization |
| - |
≥480 |
≥590 |
≥35 |
≥73 |
| Normalization |
| 25 |
470-490 |
610-640 |
24-26 |
- |
| Sheets with a thickness of 20 mm. Normalization |
| - |
≥78 |
≥98 |
≥41 |
≥80 |
| Normalization |
| 32 |
455-465 |
590 |
25 |
- |
| Sheets with a thickness of 20 mm. Normalization |
| - |
≥100 |
≥120 |
≥42 |
≥88 |
| Normalization |
| 40 |
420-440 |
550-580 |
23-25 |
- |
| Sheets with a thickness of 20 mm. Normalization |
| - |
≥190 |
≥265 |
≥36 |
≥89 |
| - |
≥270 |
≥405 |
≥29 |
≥82 |
| - |
≥320 |
≥550 |
≥30 |
≥76 |
| - |
≥350 |
≥580 |
≥27 |
≥64 |
| - |
≥390 |
≥550 |
≥27 |
≥69 |
| - |
≥430 |
≥590 |
≥29 |
≥73 |
| - |
≥59 |
≥93 |
≥58 |
≥96 |
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 |
| y |
The relative narrowing |
Physical characteristics
| Temperature |
Е, ГПа |
l, Вт/(м · °С) |
| 100 |
196 |
46 |
| 200 |
200 |
44 |
| 300 |
194 |
42 |
| 400 |
186 |
40 |
| 500 |
177 |
36 |
| 600 |
167 |
33 |
| 700 |
148 |
29 |
| 800 |
124 |
- |
| 900 |
106 |
- |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| r |
Density |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
Technological properties
| Name |
The value |
| Weldability |
welded without any restrictions. |
