Name	Code	Standards
Bars and shapes	В22	GOST 1133-71, GOST 8239-89, GOST 8240-97, GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 9234-74, GOST 11474-76, GOST 2590-2006, GOST 2591-2006, OST 5.9087-84
Classification, nomenclature and General rules	В20	GOST 19281-89
Steel pipes and fittings to them	В62	GOST 20295-85, GOST 24950-81
Sheets and strips	В23	GOST 82-70, GOST 19903-74, GOST 103-2006, GOST 19282-73, GOST 19903-90
Sheets and strips	В33	TU 14-1-4431-88
Bars and shapes	В32	TU 14-136-367-2008

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	As	Al	V	Ti
GOST 19282-73	0.12-0.18	≤0.04	≤0.035	1.3-1.7	≤0.3	0.4-0.7	≤0.3	Rest	0.15-0.3	≤0.008	≤0.08	≤0.05	0.05-0.1	≤0.03

Fe is the basis.
According to GOST 19282-73, it is allowed to modify steel with calcium and rare-earth elements from the calculation of the introduction of not more than 0.02% calcium and 0.05% rare-earth elements into the metal.
According to GOST 19281-89 and GOST 19282-73, it is allowed to add aluminum and titanium from the calculation of the mass fraction in the rolled aluminum - no more than 0.050%, titanium - no more than 0.030%.

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²
Without heat treatment - as supplied
5-9	-	≥400	≥560	≥18	-	-
5-32	-	≥390	≥550	≥18	-	-
10-32	-	-	≥560	≥18	-	-
20	-	≥390	≥550	≥18	-	-
Sheets hot-rolled
12	-	≥420	≥590	≥18	-	≥922
Sheets with a thickness of 20 mm. Annealing + Vacation
-	400	≥780	≥880	≥13	≥37	≥716
Sheets hot-rolled
20	-	≥410	≥570	≥19	-	≥608
Sheets with a thickness of 20 mm. Annealing + Vacation
-	500	≥710	≥810	≥17	≥52	≥716
Sheets hot-rolled
3	-	≥470	≥660	≥20	-	-
Sheets with a thickness of 20 mm. Annealing + Vacation
-	600	≥710	≥800	≥19	≥52	≥765
The leaves are normalized
12	-	≥450	≥640	≥27	-	≥981
Sheets with a thickness of 20 mm. Annealing + Vacation
-	650	≥640	≥730	≥22	≥58	≥1059
The plates and universal broadband in the state of delivery GOST 19282-73
5-32	-	≥390	≥550	≥18	-	-
The leaves are normalized
20	-	≥410	≥590	≥28	-	≥1246
The plates and universal broadband in the state of delivery GOST 19282-73. Hardening + Vacation
10-32	-	≥440	≥590	≥17	-	-
The leaves are normalized
3	-	≥490	≥710	≥21	-	-

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
y	The relative narrowing
KCU	Toughness

Technological properties

Name	The value
Weldability	welded without any restrictions.

Steel 15G2SFD

Designation

Description

Note

Standards

Chemical composition

Mechanical properties

Description mechanical marks

Technological properties

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