05ХГБ steel is used: for the production of welded longitudinal oil and gas pipes with improved corrosion resistance strength classes K48-K52, operated in the usual climatic conditions and regions of Siberia and the far North and used for the construction of oil-gathering system to transport corrosive gas, oil and formation water and petroleum products.

Note

The minimum temperature of the environment in the construction of pipelines or minus 60 °C.

Standards

Name	Code	Standards
Steel pipes and fittings to them	В62	TU 1380-062-05757848-2014

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	Al	Ti	Nb
TU 1380-062-05757848-2014	≤0.09	≤0.002	≤0.01	0.5-1	0.5-1	0.17-0.4	≤0.3	Rest	≤0.3	≤0.008	0.01-0.04	≤0.005	0.02-0.045

Fe is the basis.
According to TU 1380-062-05757848-2014 in the presence of additional requirements, an increase in the titanium content of not more than 0.020% is allowed. The hydrogen content in the steel before pouring is no more than 2.5 ppm. The chemical composition of the steel is chosen in such a way that the carbon equivalent of Ce and the resistance parameter for cracking Pcm do not exceed 0.41% and 0.24%, respectively. Admissible deviations by elements: by carbon + 0.1%, by manganese ± 0.020%, by sulfur + 0.0010%, by phosphorus + 0.0030%, by nitrogen + 0.0030%, by silicon + 0.020%, by chromium + 0.020%, niobium + 0.0050%, aluminum + 0.010%.

Mechanical properties

s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	KCU, kJ/m²
Electric-welded pipes TU 1380-062-05757848-2014
≥335	≥470	≥20	≥343
≥343	≥490	≥20	≥343
≥355	≥510	≥20	≥343
-	-	-	≥343

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

Technological properties

Name	The value
Macrostructure and pollution	Pollution steel non-metallic inclusions - oxides stroke (OS), oxides of point (), silicates plastic (SP), silicates fragile (CX), a non-deformable silicates (SN) should not exceed when evaluating the average score is 2.5, sulfides (C), nitrides (N) - 1,0.
Microstructure	The amount of the actual grains of ferrite in the base metal of pipes and welded joints should be no larger than 9 rooms scale 1 according to GOST 5639. Banding of ferritic-pearlitic structure of base metal of pipes must not exceed 2 points in accordance with GOST 5640.
Corrosion resistance	The ve indicators are for tests along the axis of rolling of the metal. Resistance to hydrogen cracking in the NACE TM 0284: CLR≤6%, CTR≤3%; Resistance to sulfide corrosion stress cracking in the NACE TM 0177 (method A) 1: the threshold stress intensity factor, σth not less than 0.72 of the minimum specified yield strength; Resistance to General corrosion in ГОСТ9.908, in a medium containing 5% NaCl and 400-500 mg/l H2S: speed General corrosion ≤0.5 mm/year. Resistance to hydrogen cracking of welded joints according to NACE TM 0284: CLR≤6%, CTR≤3%

Steel 05ХГБ

Designation

Description