Steel 09ГНФБ

Designation

Name The value
Designation GOST Cyrillic 09ГНФБ
Designation GOST Latin 09GHFB
Transliteration 09GNFB
By chemical elements 09MnНVNb

Description

09ГНФБ steel is used: for the production of billets, sheet ingots used for the production of parts and welded longitudinal pipes of the main gas and oil pipelines strength group К56.

Standards

Name Code Standards
Sheets and strips В33 TU 14-1-5386-99
Steel pipes and fittings to them В62 TU 14-3-1698-2000, TU 14-158-153-05, TU 14-158-146-2004

Chemical composition

Standard C S P Mn Si Ni Fe N Al V Nb
TU 14-1-5386-99 0.07-0.11 ≤0.01 ≤0.02 0.9-1.2 0.2-0.4 0.15-0.3 Rest - 0.02-0.06 0.03-0.06 0.03-0.06
TU 14-158-146-2004 0.07-0.11 ≤0.01 ≤0.02 0.9-1.2 0.2-0.4 - Rest ≤0.01 - 0.03-0.06 0.03-0.06
Fe is the basis.
According to TU 14-158-146-2004 the chemical composition is given for steel 09ГНФБ-ПЛ on a ladle sample for the 1st level of quality of pipes. For pipes of the 2nd level of quality in the ladle sample, the mass fraction of sulfur is ≤ 0.010%, phosphorus ≤ 0.015%, nitrogen ≤ 0.006%.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % KCU, kJ/m2
Longitudinal electric-welded pipes in the state of delivery on the other 14-3-1698-2000
380-480 550-670 ≥20 -
The strip 530-1020; 1220 mm in the delivery state on the other 14-1-5386-99 (KCU-60 °C)
470-570 530-630 ≥22 ≥590

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
KCU Toughness