Steel 14G2

Designation

Name	The value
Designation GOST Cyrillic	14Г2
Designation GOST Latin	14G2
Transliteration	14G2
By chemical elements	14Mn2

Description

Steel 14G2 is used: for the manufacture of large sheet of structures operating at temperatures down to -70 °C.

Note

Low alloy manganese steel. The degree of deoxidation — SP.
Steel 14G2 provides strength class long products, strip and shaped rolled CP 325 with a thickness up to 32 mm.
Steel 14G2 provides strength grade sheet, universal broadband rental and roll-formed profiles KP 325 with plate thickness of from 20 to 32 mm. without the use of additional hardening treatment.
In the application of quenching with vacation comes rolled section up to 32 mm. strength KP 390.

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 17066-94, GOST 19903-74, GOST 19904-90, GOST 103-2006, GOST 19282-73, GOST 19903-90, TU 14-1-3023-80, TU 14-1-4632-93
Bars and shapes	В22	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
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 14-1-5241-93, TU 14-1-4431-88

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	As	Al	Ti
GOST 17066-94	0.12-0.16	≤0.04	≤0.035	1.2-1.5	≤0.3	0.17-0.37	≤0.3	Rest	≤0.3	≤0.008	≤0.08	≤0.03	≤0.03
GOST 19282-73	0.12-0.18	≤0.04	≤0.035	1.2-1.6	≤0.3	0.17-0.37	≤0.3	Rest	≤0.3	≤0.008	≤0.08	≤0.05	≤0.03

Fe is the basis.
According to GOST 17066-94, the mass fraction of arsenic is allowed up to 0.015%, with the mass fraction of phosphorus being not more than 0.030%.
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, %	d₄	y, %
Bars and shapes of high-strength steel in the delivery state according to the GOST 19281-89 (specified strength class)
≤32	-	≥325	≥450	≥21	-	-
Sheet hot-rolled steel in the delivery state
2-3.9	-	-	≥460	-	≥17	-
The core diameter of 19 mm. Quenching. Cooling at a rate of 200 deg/s. speed during the holidays 1 hour
-	200	≥1220	≥1240	-	-	≥60
Sheet hot-rolled steel in the delivery state
5-9	-	≥340	≥470	≥21	-	-
The core diameter of 19 mm. Quenching. Cooling at a rate of 200 deg/s. speed during the holidays 1 hour
-	300	≥1260	≥1270	-	-	≥60
Sheets and strip heat-treated high quality in the delivery condition on the other 14-1-4632-93 (samples transverse)
5-25	-	325-520	490-690	≥23	-	-
The core diameter of 19 mm. Quenching. Cooling at a rate of 200 deg/s. speed during the holidays 1 hour
-	400	≥1150	≥1180	-	-	≥61
-	500	≥810	≥880	-	-	≥67
Plate and universal broadband rental in the state of delivery GOST 19282-73. Hardening + Vacation
10-32	-	≥390	≥530	≥18	-	-
The core diameter of 19 mm. Quenching. Cooling at a rate of 200 deg/s. speed during the holidays 1 hour
-	600	≥660	≥760	-	-	≥70
Plate and universal broadband rental as supplied by TU 14-1-5241-93, GOST 19282-73. Quenching + Tempering (samples transverse)
≤10	-	≥335	≥460	≥21	-	-
The core diameter of 19 mm. Quenching. Cooling at a speed of 45 deg/s. speed during the holidays 1 hour
-	200	≥900	≥980	-	-	≥55
Plate and universal broadband rental as supplied by TU 14-1-5241-93, GOST 19282-73. Quenching + Tempering (samples transverse)
10-32	-	≥325	≥450	≥21	-	-
The core diameter of 19 mm. Quenching. Cooling at a speed of 45 deg/s. speed during the holidays 1 hour
-	300	≥900	≥930	-	-	≥59
Pre-painted steel sheet of high-strength steel in the delivery state GOST 17066-94
0.5-3.9	-	≥315	≥460	-	≥20	-
The core diameter of 19 mm. Quenching. Cooling at a speed of 45 deg/s. speed during the holidays 1 hour
-	400	≥830	≥880	-	-	≥59
Pre-painted steel sheet of high-strength steel in the delivery state GOST 17066-94
0.5-3.9	-	≥315	≥430	-	≥20	-
The core diameter of 19 mm. Quenching. Cooling at a speed of 45 deg/s. speed during the holidays 1 hour
-	500	≥660	≥750	-	-	≥63
-	600	≥590	≥690	-	-	≥67

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
y	The relative narrowing

Technological properties

Name	The value
Weldability	Limited weldability.
The temperature of forging	Start - 1200 °C, the end of - 900 °C.