10Г2СФБ steel is used: for the manufacture of electrowelded pryamoshovny pipes of strength group K60 for 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, TU 14-3-1573-96

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	Al	V	Ti	Nb
TU 14-158-146-2004	≤0.13	≤0.01	≤0.02	1.3-1.7	-	0.25-0.5	-	Rest	-	≤0.01	-	≤0.08	-	0.03-0.05
TU 14-3-1573-96	≤0.13	≤0.02	≤0.025	1.3-1.8	≤0.3	0.25-0.5	≤0.3	Rest	≤0.3	≤0.012	0.01-0.06	≤0.1	0.005-0.02	0.03-0.05

Fe is the basis.
According to TU 14-3-1573-96, the carbon equivalent of Se ≤ 0.44%. It is allowed to introduce into the steel a technological additive silicocalcium or rare-earth materials (REM) at the rate of 0.5-2.0 kg per 1 ton of steel.
According to TU 14-158-146-2004 the chemical composition is given for the 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 manganese = 1.30-1.80%, phosphorus ≤ 0.015%, nitrogen ≤ 0.006%.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	KCU, kJ/m²
Longitudinal electric-welded pipes of oil and gas as delivered at TU 14-3-1573-96 (samples transverse; column cross section - outer diameter. wall thickness; in the graph the value is KCU KCU-60 °C)
530, 630, 720 (12-15)	≥460	≥590	≥20	≥392
530, 630, 720 (15-24)	≥460	≥590	≥20	≥490
820 (10-15)	≥460	≥590	≥20	≥392
820 (15-25)	≥460	≥590	≥20	≥490

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
KCU	Toughness

Steel 10Г2СФБ

Designation

Description

Standards

Chemical composition

Mechanical properties

Description mechanical marks

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