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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

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