Name	Code	Standards
Bars and shapes	В22	TU 14-1-3345-2006
Blanks. Of the workpiece. Slabs	В31	TU 14-1-5060-91, TU 14-1-3345-82
Steel pipes and fittings to them	В62	TU 14-3-1831-92, TU 14-159-260-95, TU 1381-204-0147016-01, TU 1317-204-0147016-01, TU 14-3-1963-95, TU 14-3-1128-2005, TU 14-3-1128-82

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	Al	V	Ti	Nb
TU 1381-204-0147016-01	0.1-0.15	≤0.008	≤0.02	0.7-0.9	-	0.17-0.37	≤0.3	Rest	≤0.3	0.015-0.04	0.04-0.08	-	0.02-0.06
TU 14-1-3345-2006	0.1-0.15	≤0.012	≤0.02	0.8-1.1	≤0.4	0.17-0.37	≤0.3	Rest	≤0.4	0.02-0.06	0.06-0.1	≥0.015	-
TU 1317-204-0147016-01	0.1-0.15	≤0.01	≤0.02	0.7-0.9	-	0.17-0.37	≤0.3	Rest	≤0.3	0.02-0.04	0.04-0.08	-	0.02-0.06
TU 14-3-1963-95	0.1-0.15	≤0.008	≤0.02	0.8-1	-	0.17-0.37	-	Rest	-	0.015-0.04	0.04-0.08	-	0.02-0.06

Fe is the basis.
According to TU 14-1-3345-2006, the pipe blank allows for a deviation in carbon - plus 0.01%, for aluminum - plus 0.02%. In order to modify the steel and globularization of sulfide inclusions, silicocalcium and (or) alumobaric minerals of at least 1 kg / ton (1: 1 ratio) are introduced into the steel. The mass fraction of calcium and (or) barium in steel is not a delivery indicator and is not controlled. In the steel, vanadium is not replaced by niobium. The addition of titanium in the amount of at least 0.015% is introduced into the steel.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	KCU, kJ/m²	HB, MPa
The tubular billet in the delivery condition on the other 14-1-3345-2006. Normalization at 910-930 °C (aging of 0.5 h)
	≥295	≥370	≥24	≥490	≤205
Pipe the seamless hot-deformed oil and gas increased corrosion resistance and cold-resistance as delivered at TU 14-3-1128-82
	≥290	≥415	≥24	-	-

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
HB	Brinell hardness number

Steel 12ГФ

Designation

Description

Note

Standards

Chemical composition

Mechanical properties

Description mechanical marks

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