Steel 12GS (SV-12GS)

Designation

Name	The value
Designation GOST Cyrillic	12ГС
Designation GOST Latin	12GC
Transliteration	12GS
By chemical elements	12MnС

Name	The value
Designation GOST Cyrillic	Св-12ГС
Designation GOST Latin	Cb-12GC
Transliteration	Sv-12GS
By chemical elements	12MnС

Description

The 12GS steel is used: for the production of parts manufactured by the methods of drawing, forging and stamping; welding wire.

Note

Steel low-alloy silico-manganese. The degree of deoxidation — SP.
The 12GS steel provides strength grade sheet, universal broadband rental and roll-formed profiles of the CP 315 with plate thickness of up to 10 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 14-158-153-05
Welding and cutting metals. Soldering, riveting	В05	GOST 2246-70, TU 14-4-748-76
Sheets and strips	В23	GOST 82-70, GOST 17066-94, GOST 19903-74, GOST 19282-73, GOST 19903-90, 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
Sheets and strips	В33	TU 14-1-1376-75, TU 14-1-3466-82, TU 14-104-143-93, TU 14-1-5246-94, 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	Mo
GOST 2246-70	≤0.14	≤0.03	≤0.03	0.8-1.1	≤0.2	0.6-0.9	≤0.3	Rest	≤0.25	≤0.01	≤0.08	≤0.05	≤0.05	≤0.04	≤0.15
GOST 19281-89	0.09-0.15	≤0.04	≤0.035	0.8-1.2	≤0.3	0.5-0.8	≤0.3	Rest	≤0.3	≤0.008	≤0.08	≤0.05	-	≤0.03	-
GOST 17066-94	0.09-0.15	≤0.04	≤0.035	0.8-1.2	≤0.3	0.5-0.7	≤0.3	Rest	≤0.3	≤0.008	≤0.08	≤0.03	-	≤0.03	-
TU 14-104-143-93	0.09-0.15	≤0.04	≤0.04	0.8-1.2	≤0.3	0.5-0.8	≤0.3	Rest	≤0.3	≤0.01	-	≤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%.
According to GOST 2246-70 the chemical composition is given for a welding wire of the brand Sv-12GS.

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d₄	y, %	KCU, kJ/m²	HB, MPa
Rolled steel in the delivery state
4-10	-	-	≥470	≥26	-	-	-	-
Card delivery status on the other 14-104-143-93
	-	≥255	≥392	≥24	-	-	-	≥134
Hot-rolled steel sheets in the delivered state
2-3.9	-	≥320	≥460	-	≥22	-	-	-
The core diameter of 19 mm. Quenching. Cooling speeds of 200 °/s. speed during the holidays 1 hour
-	200	≥1080	≥1130	-	-	≥55	-	-
Sheet and strip heat-treated rolled high quality in the delivery condition on the other 14-104-4632-93 (transverse samples, impact strength KCU-40 °C/KCU-70 °C
5-25	-	315-510	460-660	≥21	-	-	≥392/294	-
The plates and universal broadband in the state of delivery GOST 19282-73
≤10	-	≥315	≥460	-	≥26	-	-	-
The core diameter of 19 mm. Quenching. Cooling speeds of 200 °/s. speed during the holidays 1 hour
-	300	≥1040	≥1080	-	-	≥55	-	-
Welding wire SV-12GS for the manufacture of electrodes according to the GOST 2246-70
1.6; 2.0	-	-	690-990	-	-	-	-	-
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 speeds of 200 °/s. speed during the holidays 1 hour
-	400	≥980	≥1030	-	-	≥65	-	-
Welding wire SV-12GS for the manufacture of electrodes according to the GOST 2246-70
2	-	-	640-940	-	-	-	-	-
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 speeds of 200 °/s. speed during the holidays 1 hour
-	500	≥690	≥780	-	-	≥68	-	-
Welding wire SV-12GS for welding GOST 2246-70
0.3-0.5	-	-	890-1390	-	-	-	-	-
The core diameter of 19 mm. Quenching. Cooling speeds of 200 °/s. speed during the holidays 1 hour
-	600	≥610	≥730	-	-	≥75	-	-
Welding wire SV-12GS for welding GOST 2246-70
0.8-1.5	-	-	890-1340	-	-	-	-	-
The core diameter of 19 mm. Quenching. Cooling at a speed of 45 °/s. speed during the holidays 1 hour
-	200	≥720	≥850	-	-	≥60	-	-
Welding wire SV-12GS for welding GOST 2246-70
1.6	-	-	890-1290	-	-	-	-	-
The core diameter of 19 mm. Quenching. Cooling at a speed of 45 °/s. speed during the holidays 1 hour
-	300	≥640	≥760	-	-	≥65	-	-
Welding wire SV-12GS for welding GOST 2246-70
2	-	-	790-1190	-	-	-	-	-
The core diameter of 19 mm. Quenching. Cooling at a speed of 45 °/s. speed during the holidays 1 hour
-	400	≥610	≥730	-	-	≥69	-	-
Welding wire SV-12GS for welding GOST 2246-70
2	-	-	690-1040	-	-	-	-	-
The core diameter of 19 mm. Quenching. Cooling at a speed of 45 °/s. speed during the holidays 1 hour
-	500	≥530	≥690	-	-	-	-	-
-	600	≥420	≥590	-	-	≥70	-	-

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
KCU	Toughness
HB	Brinell hardness number

Technological properties

Name	The value
Weldability	Welded without any restrictions.
Склонность к отпускной хрупкости	Tend not.
The temperature of forging	Start - 1200 °C, the end - 850 °C.
Flock-sensitive sensitivity	not sensitive.