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Steel 10Х9МФБ (ДИ82)

Designation

Name The value
Designation GOST Cyrillic 10Х9МФБ
Designation GOST Latin 10X9MFB
Transliteration 10H9MFB
The chemical elements 10Cr9MoVNb
Name The value
Designation GOST Cyrillic ДИ82
Designation GOST Latin DI82
Transliteration DI82
The chemical elements CuИ82

Description

10Х9МФБ 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 and steam generator tubes of nuclear power plants.

Note

High-chromium steel of the martensitic class.

Standards

Name Code Standards
Bulls. Blanks. Slabs В31 TU 14-1-4607-89
Sectional and shaped rolling В32 TU 14-1-4616-89
Pipes steel and connecting parts to them В62 TU 14-3Р-55-2001

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu V Ti Mo Nb
TU 14-1-4607-89 0.08-0.12 ≤0.015 ≤0.03 0.3-0.6 8.6-10 ≤0.5 ≤0.7 The rest - 0.1-0.2 - 0.6-0.8 0.1-0.2
TU 14-1-4616-89 0.08-0.12 ≤0.015 ≤0.03 0.3-0.6 8.6-10 ≤0.5 ≤0.7 The rest - 0.15-0.25 - 0.8-1 0.1-0.2
TU 14-3Р-55-2001 0.08-0.12 ≤0.025 ≤0.03 0.3-0.6 8.6-10 ≤0.5 ≤0.7 The rest ≤0.3 0.15-0.25 ≤0.05 0.8-1 0.1-0.2
Fe is the basis.
According to TU 14-3P-55-2001, the chemical composition is given for steel grade 10X9MFB; in the steel grade 10X9MFB-SH the mass fraction of sulfur is ≤ 0.015%. A technological addition of rare earth elements is possible to improve the quality of the metal. The content of residual elements is in accordance with GOST 5632. In steel 10X9MFB and 10X9MFB-III, it is introduced by calculation of ferrosilicon or mischmetal by 0.05% cerium, silicocalcium by 0.05% calcium and chemical analysis is not determined.
According to TU 14-1-4607-89 the chemical composition is given for steel grade 10Х9МФБ-Ш (ДИ82-Ш). Before the release into the metal, ferrosilicon or misch metal is injected with 0.050% Ce (cerium) by calculation. In the ladle, SiCa (silicocalcium) is added to 0.050% Ca. In the steel deviations from the specified standards of chemical composition are allowed: for carbon ± 0.010%, for silicon +0.10%, for phosphorus +0.0050%, for molybdenum ± 0.050%, for niobium ± 0.030%, for chromium ± 0.10 %, for manganese +0.20%, for vanadium ± 0.030%. The content of residual elements must comply with GOST 5632.
According to TU 14-1-4616-89 the chemical composition is given for steel grade 10Х9МФБ-Ш (ДИ82-Ш). In the steel grade 10X9MFB (DI82) the sulfur content is not more than 0.025, the content of the remaining elements is the same. Before the release into the metal, ferrosilicon or misch metal is injected with 0.050% Ce (cerium) by calculation. In the ladle, SiCa (silicocalcium) is added to 0.050% Ca. In the steel, deviations from the specified standards of chemical composition are allowed: for carbon ± 0.010%, for silicon +0.10%, for molybdenum ± 0.020%, for niobium ± 0.030%, for chromium ± 0.10%, for manganese +0.20 % by vanadium ± 0.030%. The content of residual elements must comply with GOST 5632.

Mechanical characteristics

Section, mm sT|s0,2, MPa σB, MPa d5, % y, % kJ/m2, кДж/м2 Brinell hardness number, MPa
Tubular billet on the other 14-1-4607-89. Normalization at 1000-1050 °C and Quenching in oil + Vacation at 750-780 °C (aged for at least 3 h), air cooling (longitudinal samples)
20-25 ≥345 ≥490 ≥17 ≥59 - -
Seamless pipes for steam boilers and pipelines of steel grades 10Х9МФБ and 10Х9МФБ-sh in TU 14-3R-55-2001. Normalization at 1030-1050 °C + Vacation at 730-750 (excerpt 3-10 h), air cooling
- ≥400 ≥600 ≥17 ≥50 ≥590 ≤255
Tubular billet on the other 14-1-4607-89. Normalization at 1000-1050 °C and Quenching in oil + Vacation at 750-780 °C (aged for at least 3 h), air cooling (longitudinal samples)
20-25 - ≥294 - - - -
Seamless pipes for steam boilers and pipelines of steel grades 10Х9МФБ and 10Х9МФБ-sh in TU 14-3R-55-2001. Normalization at 1030-1050 °C + Vacation at 730-750 (excerpt 3-10 h), air cooling
- ≥400 ≥600 ≥19 ≥55 ≥780 ≤255
Tubular billet on the other 14-1-4616-89. Normalization at 1000-1050 °C and Quenching in oil + Vacation at 750-780 °C (aged for at least 3 h), air cooling (longitudinal samples)
≥400 ≥600 ≥19 ≥55 ≥588 -
≥380 - - - - -
≥340 - - - - -
≥320 - - - - -
≥400 ≥600 ≥19 ≥55 ≥785 -
≥380 - - - - -
≥340 - - - - -
≥320 - - - - -
Seamless pipes for steam boilers and pipelines of steel grades 10Х9МФБ and 10Х9МФБ-sh in TU 14-3R-55-2001. Normalization at 1030-1050 °C + Vacation at 730-750 (excerpt 3-10 h), air cooling
≥380 - - - - -
≥340 - - - - -
≥320 - - - - -

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

Technological properties

Name The value
Pressure treatment Clan (degree of distortion) of a tube blank on the other 14-1-4607-89 must be at least 4 for a circle of diameter 180 to 250 mm and at least 3.5 for a circle of diameter greater than 250 mm.
Macrostructure and contamination Macrostructure of steel billets on the other 14-1-4607-89 the 14-1-4616-89 should not have shrinkage and looseness, bubbles, cracks, inclusions, crusts, delamination and placenow visible without using the magnifying devices. At the point of heterogeneity, Central porosity and the square of the phase separation macrostructure of steel shall not exceed 2 points for each type. Pollution steel non-metallic inclusions shall not exceed the maximum score: - the sulphides (A) - 2 points; - on oxides and silicates (OS, OT, SH, SP) - 3 points.
Features of production Tubular billet on the other 14-1-4607-89 the 14-1-4616-89 supplied in the annealed or vysokoopasnye condition.

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