Steel 12Х11В2МФ (ЭИ756)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
12Х11В2МФ |
| Designation GOST Latin |
12X11B2MF |
| Transliteration |
12H11V2MF |
| The chemical elements |
12Cr11W2MoV |
| Name |
The value |
| Designation GOST Cyrillic |
ЭИ756 |
| Designation GOST Latin |
EI756 |
| Transliteration |
EhI756 |
| The chemical elements |
- |
Description
12Х11В2МФ steel is used: for the manufacture of billets intended for the manufacture of seamless cold, warm, hot-wrought, including hot-pressed and hot-pressed reduced pipes for steam boilers and pipelines, installations with high and supercritical steam parameters.
Note
High-chromium steel of the martensitic class.
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В32 |
TU 14-1-1529-2003 |
| Pipes steel and connecting parts to them |
В62 |
TU 14-3-460-2009, TU 14-3Р-55-2001, TU 14-3-460-2003 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| TU 14-3Р-55-2001 |
0.09-0.14 |
≤0.025 |
≤0.025 |
0.5-0.8 |
10-12 |
≤0.5 |
≤0.6 |
The rest |
≤0.3 |
0.15-0.3 |
≤0.05 |
0.6-0.9 |
1.7-2.2 |
| TU 14-3-460-2003 |
0.09-0.14 |
≤0.025 |
≤0.025 |
0.5-0.8 |
10-12 |
≤0.5 |
≤0.6 |
The rest |
≤0.3 |
0.15-0.3 |
- |
0.6-0.9 |
1.7-2.2 |
Fe is the basis.
According to TU 14-3R-55-2001, a technological addition of rare earth elements is possible to improve the quality of the metal. The content of residual elements is according to GOST 5632.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
Brinell hardness number, MPa |
| Tubular billet + hot deformed Tubes (DH=57-465 mm) TU 14-3-460-2003. Normalization 1020-1050 NN the fire in °C, air cooling + Vacation at 750-780 °C (aged for at least 3 h), air cooling |
| 20-25 |
≥392 |
≥588 |
≥17 |
≥45 |
≥490 |
≤255 |
| 20-25 |
≥390 |
640-830 |
≥18 |
- |
- |
≤255 |
| Seamless pipes for steam boilers and pipelines according to TU 14-3P-55-2001. Normalization 1020-1050 NN the fire in °C + Vacation at 750-780 (aged for at least 3 h), air cooling |
| - |
≥392 |
≥588 |
≥17 |
≥45 |
≥490 |
≤255 |
| - |
≥392 |
≥588 |
≥18 |
- |
- |
≤255 |
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 |
| kJ/m2 |
Toughness |
