Steel 14G2AF

Designation

Name	The value
Designation GOST Cyrillic	14Г2АФ
Designation GOST Latin	14G2AF
Transliteration	14G2AF
By chemical elements	14Mn2NV

Description

Steel 14G2AF used: for the manufacture of metal in the construction of industrial buildings, production farms of the crane bridge cranes; flange joints of roof trusses.

Note

Steel low alloy manganese vanadium with nitrogen. The degree of deoxidation — SP.
Steel 14G2AF provides strength grade sheet, universal broadband rental and roll-formed profiles KP KP 375 and 390 with plate thickness of up to 50 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
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
Bars and shapes	В22	GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 9234-74, GOST 11474-76
Welding and cutting metals. Soldering, riveting	В05	OST 36-58-81
Bars and shapes	В32	TU 14-1-1271-75, TU 14-136-367-2008
Sheets and strips	В33	TU 14-105-465-88, TU 14-1-4431-88, TU 14-105-465-82
Blanks. Of the workpiece. Slabs	В31	TU 14-229-289-90

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	As	Al	V	Ti	Ca
GOST 19282-73	0.12-0.18	≤0.04	≤0.035	1.2-1.6	≤0.4	0.3-0.6	≤0.3	Rest	≤0.3	0.015-0.025	≤0.08	≤0.05	0.07-0.12	≤0.03	-
TU 14-105-465-82	0.12-0.18	≤0.02	≤0.02	1.2-1.6	≤0.4	0.3-0.6	≤0.3	Rest	≤0.3	0.015-0.025	≤0.08	0.02-0.05	0.07-0.12	≤0.03	≤0.06

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%.
According to TU 14-105-465-82 in the steel grade 14G2AF, a technological addition of calcium is added to 0.060% by calculation. It is allowed to use the REM in an amount up to 0.10% (calculated). Permissible deviations in chemical composition in accordance with GOST 19282.

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %
Rolled steel. Normalization
4	-	≥550	≥20	-
The plates and universal broadband in the state of delivery GOST 19282-73
5-50	≥390	≥540	≥20	-
Normalization
14	470-485	620-630	24	-
Sheets with a thickness of 20 mm. Normalization
-	≥480	≥590	≥35	≥73
Normalization
25	470-490	610-640	24-26	-
Sheets with a thickness of 20 mm. Normalization
-	≥78	≥98	≥41	≥80
Normalization
32	455-465	590	25	-
Sheets with a thickness of 20 mm. Normalization
-	≥100	≥120	≥42	≥88
Normalization
40	420-440	550-580	23-25	-
Sheets with a thickness of 20 mm. Normalization
-	≥190	≥265	≥36	≥89
-	≥270	≥405	≥29	≥82
-	≥320	≥550	≥30	≥76
-	≥350	≥580	≥27	≥64
-	≥390	≥550	≥27	≥69
-	≥430	≥590	≥29	≥73
-	≥59	≥93	≥58	≥96

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

Physical characteristics

Temperature	Е, HPa	l, W/(m · °C)
100	196	46
200	200	44
300	194	42
400	186	40
500	177	36
600	167	33
700	148	29
800	124	-
900	106	-

A description of the physical symbols

Name	Description
Е	The normal elasticity modulus
r	Density
l	Coefficient of thermal conductivity
R	UD. the resistivity

Technological properties

Name	The value
Weldability	welded without any restrictions.

Temperature	Е, HPa	l, W/(m · °C)
100	196	46
200	200	44
300	194	42
400	186	40
500	177	36
600	167	33
700	148	29
800	124	-
900	106	-

Temperature	Е, HPa	l, W/(m · °C)
100	196	46
200	200	44
300	194	42
400	186	40
500	177	36
600	167	33
700	148	29
800	124	-
900	106	-