Steel 30KHGSN2A (30ХГСНА)

Designation

Name	The value
Designation GOST Cyrillic	30ХГСН2А
Designation GOST Latin	30XGCH2A
Transliteration	30HGSN2A
By chemical elements	30CrMnСН2

Name	The value
Designation GOST Cyrillic	30ХГСНА
Designation GOST Latin	30XGCHA
Transliteration	30HGSNA
By chemical elements	30CrMnСН

Description

30KHGSN2A steel is used: for the manufacture of gears, flanges, Cams, fingers, rollers, axles, pins and other critical heavily loaded parts; the manufacture of the most critical parts of the aircraft chassis, wings and center section of the plane, joints, flanges of the spar and bolts; pressed extra virgin profiles, long products and structural shapes, sheets and strips, tubes.

Note

High-strength steel, structural, high quality, bromocinnamaldehyde.

Standards

Name	Code	Standards
Bars and shapes	В32	GOST 1051-73, GOST 4543-71, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-1-1885-85, TU 14-1-2118-77, TU 14-1-2213-77, TU 14-1-658-73, TU 14-1-950-74, TU 1-9-30-82, TU 14-1-4247-87, TU 14-1-4020-85, TU 14-1-3238-81, TU 14-11-245-88, TU 14-1-3238-2006, TU 14-136-367-2008
Sheets and strips	В33	GOST 11268-76, GOST 11269-76, TU 14-1-3422-82
Bars and shapes	В22	GOST 1133-71, GOST 8319.0-75, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006, TU 1-9-1046-79
Steel pipes and fittings to them	В62	GOST 21729-76, TU 14-3-674-78, TU 14-3-675-78
Sheets and strips	В23	GOST 82-70, GOST 103-2006
Classification, nomenclature and General rules	В20	OST 1 90005-91
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-4944-90, TU 14-1-4992-91, TU 1-92-156-90
Norms for calculation and design	В02	PI 1.2.053-78

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	V	Ti	Mo	W
TU 14-1-1885-85	0.27-0.33	≤0.011	≤0.015	1-1.2	0.9-1.2	0.9-1.2	1.4-1.8	Rest	≤0.25	-	-	-	-
TU 14-1-950-74	0.27-0.33	≤0.025	≤0.025	1-1.3	0.9-1.2	0.9-1.2	1.4-1.8	Rest	≤0.25	≤0.05	≤0.03	≤0.15	≤0.2
GOST 4543-71	0.27-0.34	≤0.025	≤0.025	1-1.3	0.9-1.2	0.9-1.2	1.4-1.8	Rest	≤0.3	≤0.05	≤0.03	≤0.15	≤0.2
GOST 21729-76	0.27-0.34	≤0.011	≤0.015	1-1.2	0.9-1.2	0.9-1.2	1.4-1.8	Rest	≤0.2	≤0.05	≤0.03	≤0.15	≤0.2
TU 14-3-674-78	0.28-0.34	≤0.005	≤0.025	0.8-1.1	0.8-1.1	0.9-1.2	1.8-2.1	Rest	-	-	-	-	-
GOST 11268-76	0.27-0.34	≤0.025	≤0.025	1-1.3	0.9-1.2	0.9-1.2	1.4-1.8	Rest	≤0.25	≤0.05	≤0.03	≤0.15	≤0.2

Fe is the basis.
GOST 4543-71 regulates the content of high-quality steel: P≤0,025%; S≤0.015%; Сu≤0.25%.
According to TU 14-1-3238-81 for steel grade 30ХГСН2А-СШ (30ХГСНА-СШ) the content of S≤0,015%.
According to TU 14-3-674-78 the chemical composition is given for steel 30ХГСН2А-ВД.
According to GOST 21729-76 the chemical composition is given for steel 30ХГСН2А-ВД; steel grade 30ХГСН2А must have a chemical composition in accordance with GOST 4543. When smelting steel skapprotsessom the mass fraction of copper should be ≤ 0,25% in steels of grades 30ХГСН2А and 30ХГСН2А-ВД. The maximum deviation in chemical composition is in accordance with GOST 4543. For steel grade 30ХГСН2А-ВД the total mass fraction of sulfur and phosphorus should not exceed 0.22%.
According to TU 14-1-1885-85 the chemical composition is given for steel 30ХГСН2А-ВД. In steel, the sum of the content of phosphorus and sulfur should not exceed 0.022%. To ensure the required grain size, it is allowed to introduce vanadium in the steel smelting at the rate of its content in steel no more than 0.10%, the content of which in steel is not determined. The presence of tungsten to 0.20%, molybdenum to 0.15%, titanium to 0.030% is not a defect. The permissible deviation in the content of manganese in steel is + 0.010 / -0.020%, in carbon content + 0.010%, in sulfur and phosphorus content, provided that their total content is not more than 0.022%. For steel certified by the Quality mark, the sulfur content in steel shall not exceed 0.010%, while deviations from the content of sulfur and phosphorus in steel are allowed, provided that their total content is not more than 0.021%.

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	d₁₀	y, %	KCU, kJ/m²	HB, MPa	HRC
Pipe seamless cold drawn, cold rolled and toplocatie, heat-treated in the delivery condition according to GOST 21729-76
	-	-	≥588	≥15	-	-	-	-	-
Quenching in water from 900 °C to + leave (indicate the cutting direction of sample)
≤100	-	1070-1170	1260-1290	8-10	-	29-35	-	-	-
Rolled steel. Quenching in oil from 900 °C + vacation, cooling in oil
-	200	≥1500	≥1900	≥15	-	≥55	-	-	≥52
A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 20 mm/min strain Rate 0,007 1/s.
-	-	≥98	≥115	≥33	-	≥77	-	-	-
Quenching from 900 °C, NTMO: 550 °C, the deformation in 3 passes on 63 % (25%, 25%, 13% with intermediate heating). Cooling in oil. Vacation at 275 °C (6 h exposure)
-	-	≥2130	≥2310	-	-	-	≥196	-	-
Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91
-	-	-	1370-1570	-	-	-	-	388-445	41-45.5
Steel hot-rolled sheet (4-60 mm) 4-th and 5-th categories. Quenching in oil from 900±15 °C, the release during 200-300 °C, air cooling
	-	-	≥1570	≥9	-	-	≥590	-	-
Quenching in water from 900 °C to + leave (indicate the cutting direction of sample)
100-150	-	1030-1050	1090-1150	3-5	-	9-10	-	-	-
Rolled steel. Quenching in oil from 900 °C + vacation, cooling in oil
-	300	≥1500	≥1800	≥15	-	≥53	-	-	≥51
A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 20 mm/min strain Rate 0,007 1/s.
-	-	≥64	≥81	≥51	-	≥77	-	-	-
The cross section of 20 mm., vtmo: deformation temperature 960 °C, the degree of deformation of 20 %. Vacation at 270 °C (exposure 2 hours)
-	-	-	≥1800	≥10	-	≥45	≥638	-	47-51
Flats on the other 14-1-4118-2004
≤3.9	-	-	589-834	≥19	≥15	-	-	-	-
Quenching in water from 900 °C to + leave (indicate the cutting direction of sample)
150-250	-	1000	880-1080	4	-	7-8	-	-	-
Rolled steel. Quenching in oil from 900 °C + vacation, cooling in oil
-	400	≥1350	≥1500	≥15	-	≥52	-	-	≥49
A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 20 mm/min strain Rate 0,007 1/s.
-	-	≥42	≥49	≥53	-	≥90	-	-	-
Bars and strip hot rolled and forged. Quenching in oil with 890-910 °C + Vacation at 200-300 °C, air cooling
	-	≥1375	≥1570	≥9	-	≥45	≥590	≤444	-
Quenching in water from 900 °C to + leave (indicate the cutting direction of sample)
≤100	-	1000-1020	1190-1230	16-17	-	43-54	-	-	-
Rolled steel. Quenching in oil from 900 °C + vacation, cooling in oil
-	500	≥1150	≥1300	≥16	-	≥50	-	-	≥42
A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 20 mm/min strain Rate 0,007 1/s.
-	-	≥25	≥32	≥67	-	≥100	-	-	-
Rods made of steel 30KHGSN2A (30ХГСНА) TU 14-1-1885-85. Quenching in oil with 890-910 °C + Vacation at 200-300 °C, air cooling. In the graph KCU KCU values are shown along the fiber/KCU across the grain
	-	≥1375	≥1670	≥9	-	≥45	≥588/343	≤444	-
Quenching in water from 900 °C to + leave (indicate the cutting direction of sample)
100-150	-	940-980	1160-1170	9-13	-	26-36	-	-	-
Rolled steel. Quenching in oil from 900 °C + vacation, cooling in oil
-	600	≥900	≥1000	≥20	-	≥55	-	-	≥37
A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 20 mm/min strain Rate 0,007 1/s.
-	-	≥15	≥22	≥69	-	≥100	-	-	-
Rods made of steel 30KHGSN2A (30ХГСНА) TU 14-1-1885-85. Quenching in oil with 890-910 °C + Vacation at 200-300 °C, air cooling. In the graph KCU KCU values are shown along the fiber/KCU across the grain
	-	≥1375	≥1620	≥9	-	≥45	≥588/343	≤444	-
Quenching in water from 900 °C to + leave (indicate the cutting direction of sample)
150-250	-	940-960	1130-1170	15-18	-	23-41	-	-	-
A sample with diameter 10 mm, length 50 mm, laminated. The rate of deformation of 20 mm/min strain Rate 0,007 1/s.
-	-	≥11	≥17	≥77	-	≥100	-	-	-
Bars and rods of steel treated in the ladle a synthetic slag in the delivery condition on the other 14-1-658-73. Samples of the cross
	-	-	-	≥5	-	≥28	≥294	-	-
Quenching in oil 900 °C, oil + leave (indicate the cutting direction of sample)
≤100	-	470-490	780-810	≥20	-	52-60	-	-	-
Rolled steel. Quenching in oil from 890 °C to + vacation at 360 °C, cooling in oil
-	-	-	≥1550	-	≥9	≥52	-	-	-
Quenching in oil 900 °C, oil + leave (indicate the cutting direction of sample)
100-150	-	480-490	710-780	15-20	-	36-51	-	-	-
Rolled steel. Quenching in oil from 890 °C to + vacation at 360 °C, cooling in oil
-	-	-	≥1550	-	≥9	≥52	-	-	-
Quenching in oil 900 °C, oil + leave (indicate the cutting direction of sample)
150-250	-	500-520	-	16-17	-	46-51	-	-	-
Rolled steel. Quenching in oil from 890 °C to + vacation at 360 °C, cooling in oil
-	-	-	≥1550	-	≥10	≥53	-	-	-
Quenching in oil 900 °C, oil + leave (indicate the cutting direction of sample)
≤100	-	540-570	800-820	20-23	-	64-66	-	-	-
Rolled steel. Quenching in oil from 890 °C to + vacation at 360 °C, cooling in oil
-	-	-	≥1400	-	≥10	≥54	-	-	-
Quenching in oil 900 °C, oil + leave (indicate the cutting direction of sample)
100-150	-	500-520	780	20-23	-	64	-	-	-
Rolled steel. Quenching in oil from 890 °C to + vacation at 360 °C, cooling in oil
-	-	≥710	≥860	-	≥21	≥72	-	-	-
Quenching in oil 900 °C, oil + leave (indicate the cutting direction of sample)
150-250	-	500-520	-	18-23	-	58-65	-	-	-

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
d₁₀	Elongation after rupture
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number
HRC	Rockwell hardness (indenter diamond spheroconical)

Physical characteristics

Temperature	Е, HPa	G, HPa	r, kg/m³	l, W/(m · °C)	R, Mr. · m	a, 10^-6 1/°C	С, J/(kg · °C)
0	195	77	-	-	-	-	-
20	195	-	7770	285	440	-	-
300	180	70	-	314	-	13	587
400	168	65	-	-	-	149	-
500	135	51	-	-	-	-	-
100	-	-	-	294	-	106	503
200	-	-	-	306	-	112	545

A description of the physical symbols

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

Technological properties

Name	The value
Weldability	Difficult weldability.
Склонность к отпускной хрупкости	Inclined.
The temperature of forging	Start - 1200 °C, the end - of 800 °C. the Cooling sections 60 mm is more slow, less air in the stacks.
Flock-sensitive sensitivity	Sensitive.
Macrostructure and pollution	Macrostructure of steel when testing for the breaks in the longitudinal direction and transverse templeto selected from rolled, should not have shrinkage, porosity, bubbles, cracks, delamination, inclusions and placenow and defects of fracture, listed in Annex 3 GOST 10243. The Central porosity, point heterogeneity and phase separation in the square should not exceed 1 points; layer-by-layer crystallization and the bright loop - 3 points reference scales GOST 10243. All other defects under GOST 10243, are not allowed. Pollution steel non-metallic inclusions should be according to the average score is not higher (in points): oxides of point 1,5, 2,0 stroke oxides, silicates fragile 1,0, 1,0 silicates plastic, silicates, non-deformed 2,5, 2,5 sulfides, nitrides stroke and point 1,0.