30KHN2MA steel is used: for the manufacture of crankshafts, connecting rods, critical bolts, studs, special fasteners, discs, sprockets and other critical parts operating under severe loading conditions during normal, low and elevated temperatures.

Note

Structural steel high-quality romancelatina.

Standards

Name	Code	Standards
Sheets and strips	В23	GOST 103-2006
Bars and shapes	В32	GOST 1051-73, GOST 4543-71, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-1-2118-77, TU 14-11-245-88, TU 14-136-367-2008
Bars and shapes	В22	GOST 1133-71, GOST 8319.0-75, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Processing of metals by pressure. Forgings	В03	GOST 8479-70
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-4944-90

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, MPa
Quenching in oil from 860 °C to + leave at 530 °C, air cooling
≤15	-	785	980	10	45	765	-
Bars. Normalization at 860 °C, cooling in water + vacation at 680 °C + Quenching in oil from 850 °C + vacation 600-620 °C, cooling in water
120-160	-	720	850	15	57	932	245
Quenching + tempering (forgings)
100-300	-	540	685	13	40	481	223-262
Quenching in oil from 850 °C + vacation (exposure 1 h)
-	200	1550	1750	10	587	125	-
Forging a cross section of 80 mm. Quenching + high holidays
-	-	1100	1200	15	589	125	-
After quenching from 1150 °C and NTMO (700 °C, deformation 50%), cooling in oil + vacation at 200 °C (4 h exposure)
-	-	1620	1860	-	25	343	500
Bars. Normalization at 860 °C, cooling in water + vacation at 680 °C + Quenching in oil from 850 °C + vacation 600-620 °C, cooling in water
15-40	-	900	1000	12	62	1472	300
Quenching in oil from 850 °C + vacation (exposure 1 h)
-	300	1450	1600	13	608	90	-
Forging a cross section of 80 mm. Quenching + high holidays
-	-	950	1100	16	618	120	-
After quenching from 1150 °C and NTMO (500 °C, the deformation of 50%), cooling in oil +vacation at 200 °C (4 h exposure)
-	-	1760	2050	-	20	353	540
Bars. Normalization at 860 °C, cooling in water + vacation at 680 °C + Quenching in oil from 850 °C + vacation 600-620 °C, cooling in water
160-200	-	600	800	16	55	785	240
Quenching in oil from 850 °C + vacation (exposure 1 h)
-	400	1300	1400	11	587	100	-
Forging a cross section of 80 mm. Quenching + high holidays
-	-	800	950	20	736	100	-
After quenching from 1150 °C and NTMO (900 °C, deformation 50%), cooling in oil + leave 200 °C (4 h exposure)
-	-	1550	1760	-	40	392	460
Bars. Normalization at 860 °C, cooling in water + vacation at 680 °C + Quenching in oil from 850 °C + vacation 600-620 °C, cooling in water
200-240	-	600	800	17	53	736	230
Quenching in oil from 850 °C + vacation (exposure 1 h)
-	500	1100	1200	15	638	125	-
Forging a cross section of 80 mm. Quenching + high holidays
-	-	700	800	20	785	70	-
Bars. Normalization at 860 °C, cooling in water + vacation at 680 °C + Quenching in oil from 850 °C + vacation 600-620 °C, cooling in water
40-80	-	800	930	13	63	1373	275
Quenching in oil from 850 °C + vacation (exposure 1 h)
-	600	900	1000	19	687	200	-
Forging a cross section of 80 mm. Quenching + high holidays
-	-	450	540	30	912	105	-
Bars. Normalization at 860 °C, cooling in water + vacation at 680 °C + Quenching in oil from 850 °C + vacation 600-620 °C, cooling in water
80-120	-	700	850	15	62	1177	250

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
KCU	Toughness
HB	Brinell hardness number

Physical characteristics

Temperature	Е, HPa	G, HPa	r, kg/m³
0	204	80	7850
20	204	-	-
100	201	79	-
200	194	76	-
300	186	72	-
400	182	69	-
500	171	67	-
600	159	61	-

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
The temperature of forging	Start - 1200 °C, the end - of 800 °C. slow Cooling. For large sections held anti-flake treatment.
Flock-sensitive sensitivity	sensitive

Steel 30KHN2MA (30ХНМА)

Designation

Description