Steel 09Н2МФБА (09Н2МФБА-A)

Designation

Name The value
Designation GOST Cyrillic 09Н2МФБА
Designation GOST Latin 09H2MFBA
Transliteration 09N2MFBA
By chemical elements 09Н2MoVNb
Name The value
Designation GOST Cyrillic 09Н2МФБА-А
Designation GOST Latin 09H2MFBA-A
Transliteration 09N2MFBA-A
By chemical elements 09Н2MoVNbN-

Description

09Н2МФБА steel is used: for the manufacture of forgings of thickness up to 500 mm, obtained by free forging on presses intended for production of details of transport containers used for the transport of spent nuclear fuel used at temperatures up to Minot 50 °C, and structures, operating in conditions of Siberia and the far North.

Standards

Name Code Standards
Blanks. Of the workpiece. Slabs В31 TU 24.11.027-91

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Al V Ti Mo Nb
TU 24.11.027-91 0.05-0.09 ≤0.01 ≤0.01 0.2-0.5 ≤0.25 0.1-0.3 1.95-2.5 Rest ≤0.4 0.01-0.03 0.05-0.1 0.003-0.01 0.3-0.45 0.05-0.1
Fe is the basis.
According to TU 24.11.027-91 the chemical composition is given for steel grade 09N2MFBA-A. Deviations of the mass fraction of elements in the ladle sample are allowed provided that the metal of forgings meets the other requirements of TU 24.11.027-91: C -0.010%, Ni + 0.10%, Mn + 0.10%, Mo + 0.050%, Cr +0, 10%. Additionally, the mass fractions of aluminum and titanium are determined, the results of which are not acceptance tests, but are recorded in the forgery passport.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2
Forging as supplied on the other 24.11.027-91. Basic heat treatment + Leave (in the graph of impact strength for longitudinal samples indicated KCV at σт ≤ 304 MPa / KCV at σт > 304 MPa)
200-300 390-590 ≥22 ≥60 ≥294/392
195-295 385-585 ≥30 ≥30 ≥300

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU Limit short-term strength
d5 Elongation after rupture
y The relative narrowing
KCU Toughness

Technological properties

Name The value
Weldability Welded without any restrictions.
Welding defects Welding and control of repair and correction of defects are produced in compliance with PN AE G7-009-89 and PN AE G7-010-89.