Name	Code	Standards
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 19282-73
Bars and shapes	В22	GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 9234-74, GOST 11474-76
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	0.14-0.22	≤0.04	≤0.035	1.3-1.7	≤0.3	≤0.17	≤0.3	Rest	0.15-0.3	0.015-0.03	≤0.08	≤0.05	0.08-0.15	≤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	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d₄
Steel hot-rolled sheet in the delivery condition
≤4	≥450	≥600	-	≥19
The plates and universal broadband in the state of delivery GOST 19282-73
5-50	≥440	≥590	≥19	-

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
d₄	Elongation after rupture

Technological properties

Name	The value
Weldability	without restrictions

Steel 18G2AFD (18Г2АФДпс)

Designation

Description

Note

Standards

Chemical composition

Mechanical properties

Description mechanical marks

Technological properties

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