05Г1Б steel is used: for the manufacture of electrowelded pryamoshovny pipes of strength group K54 for the construction of gas pipelines, oil pipelines and oil product pipelines.

Standards

Name	Code	Standards
Steel pipes and fittings to them	В62	TU 14-158-146-2004

Chemical composition

Standard	C	S	P	Mn	Si	Fe	N	Nb
TU 14-158-146-2004	≤0.07	≤0.005	≤0.02	1.2-1.4	0.17-0.35	Rest	≤0.01	0.05-0.08

Fe is the basis.
According to TU 14-158-146-2004 the chemical composition is given for steel grade 05G1B for a ladle sample for the 1st level of the quality of the pipes. For pipes of the 2nd level of quality in the ladle sample, the mass fraction of phosphorus is ≤ 0.015%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %
Longitudinal electric-welded pipes of oil and gas in the state of delivery on the other 14-158-146-2004 (samples transverse; column cross section - outer diameter. wall thickness)
530, 720, 820 (7-12)	≥390	≥530	≥20

Description mechanical marks

Name	Description
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	Limit short-term strength
d₅	Elongation after rupture

Technological properties

Name	The value
Weldability	Welded without any restrictions.
Microstructure	Ferritic-banana structure.

Steel 05Г1Б

Designation

Description

Standards

Chemical composition

Mechanical properties

Description mechanical marks

Technological properties

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