Steel 16G2AF

Designation

Name	The value
Designation GOST Cyrillic	16Г2АФ
Designation GOST Latin	16G2AF
Transliteration	16G2AF
By chemical elements	16Mn2NV

Description

16G2AF steel is used: for the manufacture of steel structures, welded farm and other machinery; electric-welded pipes with a diameter of 127, 140, 152, 159, 168, 219, 273 mm for building; casings of blast furnaces.

Note

Steel low alloy manganese vanadium with nitrogen. The degree of deoxidation — SP.
16G2AF steel provides strength grade sheet, universal broadband rental and roll-formed profiles KP 390 with plate thickness of 32 to 40 mm., CP 440 with a thickness up to 32 mm. without the use of additional hardening treatment.

Standards

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, TU 14-3-567-76, TU 14-3-67-72
Sheets and strips	В23	GOST 82-70, GOST 19903-74, GOST 19282-73, GOST 19903-90, TU 14-1-1175-74, TU 14-1-4632-93, TU 14-1-5507-2005
Bars and shapes	В22	GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 9234-74, GOST 11474-76, TU 14-1-1762-76
Sheets and strips	В33	TU 14-1-1779-76, TU 14-1-4431-88, TU 14-1-219-72
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	0.14-0.2	≤0.04	≤0.035	1.3-1.7	≤0.4	0.3-0.6	≤0.3	Rest	≤0.3	0.015-0.025	≤0.08	≤0.05	0.08-0.14	≤0.03
TU 14-1-5507-2005	0.14-0.18	≤0.006	≤0.012	1.3-1.7	≤0.4	0.2-0.5	≤0.3	Rest	≤0.3	0.015-0.025	-	-	0.08-0.14	-
TU 14-1-219-72	0.14-0.2	≤0.04	≤0.035	1.3-1.7	≤0.4	0.4-0.7	≤0.3	Rest	≤0.3	0.015-0.03	-	-	0.08-0.18	-

Fe is the basis.
According to GOST 19282-73 chemical analysis of steel grade 16G2AF is presented. Modification of steel by calcium and rare earth elements is allowed from the calculation of the introduction into the metal of not more than 0.02% calcium and 0.05% rare earth elements.
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%.
According to TU 14-1-1762-76 chemical analysis of steel grade 16G2AF is presented.
According to TU 14-1-219-72 chemical analysis of steel grade 16G2AF on a ladle sample is presented. The nitrogen content is calculated.
According to TU 14-1-5507-2005 chemical analysis of 16G2AF-III grade steel is presented.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d	y, %
Sheets and strips (samples transverse)
32-50	≥410	≥570	≥20	-	-
The hot rolled band roll as supplied on the other 14-1-219-72
-	≤441	≤637.6	-	≥16	-
The plates and universal broadband in the state of delivery GOST 19282-73
32-50	≥410	≥570	≥20	-	-
Sheets and strips (samples transverse)
32	≥440	≥590	≥20	-	-
The plates and universal broadband in the state of delivery GOST 19282-73
5-32	≥440	≥590	≥20	-	-
Steel hot rolled as supplied on the other 14-1-1762-76
6-9	≤440	≤686	≥20	-	-
Rolled plates in the state of delivery on the other 14-1-5507-2005. Normalization of the plates with a thickness up to 60 mm. Protivosokova processing sheets with a thickness over 60 mm. In the graph, the relative narrowing of the given parameter relative narrowing across rolling/in the direction of thickness of the sheet
25-32	≥440	≥590	≥25	-	≥60/30
33-50	≥410	≥570	≥25	-	≥60/30
51-100	≥390	≥490	≥25	-	≥60/30

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
d	Elongation after rupture
y	The relative narrowing

Technological properties

Name	The value
Weldability	Welded without any restrictions.
Macrostructure and pollution	The macrostructure of the leaves on the other 14-1-5507-2005, check for the etched cross Templeton, length not less than 100 mm should not be visible without using the magnifying devices of the traces of shrinkage looseness, blistering, delamination, cracks, inclusions and Kramatorsk, as well as placenow.
Impact strength	Rolled plates with a thickness of 25-100 mm shall be tested for impact strength. Impact strength when tested must be: KCU-40°C ≥ 980 kJ/m2, KCU-70°C ≥ 290 kJ/m2, KCV-40°C ≥ 390 kJ/m2.