45KHN2MFA steel is used: for the manufacture of the torsion shaft by means of hot upsetting with subsequent mechanical processing; gear boxes and other loaded parts operating under torsional alternating loads and dynamic nagoski experiencing.

Note

Structural steel high-quality hromonikelemolibdenovyh.

Standards

Name	Code	Standards
Sheets and strips	В23	GOST 103-2006
Bars and shapes	В22	GOST 1133-71, GOST 8319.0-75, GOST 2590-2006, GOST 2591-2006, GOST 2879-2006
Bars and shapes	В32	GOST 4543-71, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-1-1725-76, TU 14-1-2118-77, TU 14-11-245-88, TU 14-1-1271-75, TU 14-136-367-2008
Blanks. Of the workpiece. Slabs	В31	OST 3-1686-90, TU 14-1-4944-90
Sheets and strips	В33	TU 14-1-1450-75

Mechanical properties

Section, mm	t отпуска, °C	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²
The hot rolled steel 45KHN2MFA-W for the manufacture of the torsion shaft by means of hot upsetting THAT 14-1-1725-76. Quenching in oil with 860-880 °C + Vacation at 210-230 °C, air cooling
	-	≥1475	≥1766	≥8	≥35	≥392
Rolled steel. Quenching in oil or water from 850 °C + Vacation at 560 °C, air cooling (named place of clippings sample)
120-160	-	≥1200	≥1300	≥10	≥37	≥451
Rolled steel. Quenching in oil from 850 °C + Vacation (excerpt 2 h), cooling in water
-	200	≥1870	≥1980	≥8	≥32	≥461
Long products hot-rolled steel. Vacation at 450 °C, cooling in oil
	-	1325	≥1470	≥7	≥35	≥382
Rolled steel. Quenching in oil or water from 850 °C + Vacation at 560 °C, air cooling (named place of clippings sample)
120-160	-	≥1080	≥1180	≥8	≥24	≥324
Rolled steel. Quenching in oil from 850 °C + Vacation (excerpt 2 h), cooling in water
-	300	≥1700	≥1800	≥10	≥44	≥334
Rolled steel. Quenching in oil from 860 °C
≤25	-	≥1275	≥1420	≥7	≥35	≥383
Rolled steel. Quenching in oil or water from 850 °C + Vacation at 560 °C, air cooling (named place of clippings sample)
80-120	-	≥1170	≥1250	≥11	≥36	≥304
Rolled steel. Quenching in oil from 850 °C + Vacation (excerpt 2 h), cooling in water
-	400	≥1470	≥1530	≥10	≥46	≥422
Rolled steel. Isothermal quenching from 880 °C in a hot environment with a temperature of 280 °C
	-	≥1400	≥2000	-	≥26	≥540
Rolled steel. Quenching in oil from 850 °C + Vacation at 560 °C, air cooling
≤30	-	≥1320	≥1380	≥11	≥40	≥343
Rolled steel. Quenching in oil from 850 °C + Vacation (excerpt 2 h), cooling in water
-	500	≥1250	≥1290	≥14	≥53	≥795
Rolled steel. Isothermal quenching from 880 °C in a hot environment with a temperature of 320 °C
	-	≥1250	≥1600	-	≥36	≥981
Rolled steel. Quenching in oil from 850 °C + Vacation at 560 °C, air cooling
30-50	-	≥1320	≥1370	≥12	≥42	≥363
Rolled steel. Quenching in oil from 850 °C + Vacation (excerpt 2 h), cooling in water
-	600	≥1080	≥1130	≥19	≥58	≥1275
Rolled steel. Isothermal quenching from 880 °C in a hot environment with a temperature of 360 °C
	-	≥1000	≥1350	-	≥37	≥736
Rolled steel. Quenching in oil from 850 °C + Vacation at 560 °C, air cooling
50-80	-	≥1300	≥1370	≥12	≥38	≥363
Rolled steel. Quenching in oil from 850 °C + Vacation (excerpt 2 h), cooling in water
-	700	≥720	≥830	≥24	≥68	≥1815

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

Physical characteristics

Temperature	Е, HPa	G, HPa	l, W/(m · °C)	R, Mr. · m	a, 10^-6 1/°C	С, J/(kg · °C)
0	216	87	34	300	-	-
20	216	-	34	300	-	-
100	207	82	34	363	11	480
200	197	78	33	460	116	500
300	188	73	32	557	121	520
400	176	69	31	677	127	540
500	168	65	30	822	133	540
600	152	59	29	993	137	-
700	136	52	27	1160	139	555
800	128	48	26	-	139	-
1000	-	-	-	-	109	-

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. Method of welding: SMAW. Necessary preheating and subsequent heat treatment.
Склонность к отпускной хрупкости	tend not
The temperature of forging	Start - 1200 °C, the end - of 800 °C. the cross Sections up to 60 mm are cooled slowly. For large sections held anti-flake heat treatment.
Flock-sensitive sensitivity	sensitive

Steel 45KHN2MFA (45ХНМФА)

Designation

Description