Steel 09Г2

Designation

Name	The value
Designation GOST Cyrillic	09Г2
Designation GOST Latin	09G2
Transliteration	09G2
By chemical elements	09Mn2

Description

09Г2 steel is used: for the manufacture of farm stands, components of the upper trim cars, spinal beams, I-beams and other parts used in car building, parts, excavator, welded steel elements and other parts operating at temperatures from -40 °C to +450 °C; as a base layer in the manufacture of hot-rolled dual-layer corrosion-resistant sheets, steel bent closed welded square and rectangular sections, intended for use in agricultural machinery, tractor and other sectors of the economy.

Note

Low alloy manganese steel. The degree of deoxidation — SP.
Steel 09Г2 provides classes strength long products, strip and shaped rolled KP 295, in thicknesses up to 32 mm.
Steel 09Г2 provides strength grade sheet, universal broadband rental and roll-formed profiles KP 295 with plate thickness of 32 mm. without the use of additional hardening treatment.

Standards

Name	Code	Standards
Sheets and strips	В33	GOST 10885-85, TU 14-1-1965-77, TU 14-1-5241-93, TU 14-1-4431-88
Bars and shapes	В22	GOST 1133-71, GOST 5267.0-90, GOST 8239-89, GOST 8240-97, GOST 8278-83, GOST 8281-80, GOST 8282-83, GOST 8283-93, GOST 8509-93, GOST 8510-86, GOST 9234-74, GOST 10551-75, GOST 11474-76, GOST 25577-83, GOST 2590-2006, GOST 2591-2006, OST 5.9087-84, TU 14-15-146-85, TU 14-2-341-78, TU 14-105-568-93
Classification, nomenclature and General rules	В20	GOST 19281-89
Steel pipes and fittings to them	В62	GOST 20295-85, GOST 24950-81, TU 14-3-1393-86
Sheets and strips	В23	GOST 82-70, GOST 17066-94, GOST 19903-74, GOST 19904-90, GOST 19282-73, GOST 19903-90, TU 14-1-3023-80, TU 14-1-4632-93, TU 14-1-2743-79
Bars and shapes	В32	TU 14-1-1271-75, TU 14-136-367-2008

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	As	Al	Ti
GOST 17066-94	≤0.12	≤0.04	≤0.035	≤1.4	≤0.3	0.17-0.37	≤0.3	Rest	≤0.3	≤0.008	≤0.08	≤0.03	≤0.03
TU 14-1-2743-79	≤0.12	≤0.04	≤0.035	1.4-1.8	≤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, %	HB, MPa
Rolled steel. Hardening + Vacation
-	200	≥780	≥930	≥12	-	≥40	≥337
-	300	≥690	≥880	≥14	-	≥50	≥325
-	400	≥620	≥750	≥19	-	≥60	≥260
-	500	≥590	≥690	≥21	-	≥65	≥225
-	600	≥570	≥670	≥22	-	≥65	≥200
-	700	≥380	≥640	-	-	-	≥80
Thin sheet hot-rolled mill in the state of delivery
≥4	-	≥310	≥450	≥21	-	-	-
The plates and universal broadband in the state of delivery GOST 19282-73, TU 14-1-5241-93 GOST 19281-89 (specified strength class)
≤20	-	≥305	≥440	≥21	-	-	-
Thin sheet hot-rolled mill in the state of delivery
2-3.9	-	-	≥440	-	≥17	-	-
The plates and universal broadband in the state of delivery GOST 19282-73, TU 14-1-5241-93 GOST 19281-89 (specified strength class)
20-32	-	≥295	≥430	≥21	-	-	-
Sheets and strip heat-treated in the condition of delivery on the other 14-1-4632-93
5-25	-	295-490	430-630	≥24	-	-	-
The rolled sheet of broadband, as delivered at TU 14-1-2743-79.
4-20	-	≥304	≥441	-	≥21	-	-
4-20	-	≥333	≥461	-	≥21	-	-
Pre-painted steel sheet of high-strength steel in the delivery state GOST 17066-94
0.5-3.9	-	≥295	≥440	-	≥20	-	-
0.5-2	-	≥265	≥390	-	≥17	-	-
2.1-3.9	-	≥295	≥410	-	≥20	-	-

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
HB	Brinell hardness number

Technological properties

Name	The value
Weldability	Welded without any restrictions. Welding methods: SMAW, ADS submerged arc and gas protection electroslag welding.
Склонность к отпускной хрупкости	Tend not.
The temperature of forging	Start - 1250 °C, the end - 850 °C.
Flock-sensitive sensitivity	not sensitive.