Steel 45KHN2MFA (45ХНМФА)

Designation

Name The value
Designation GOST Cyrillic 45ХН2МФА
Designation GOST Latin 45XH2MFA
Transliteration 45HN2MFA
By chemical elements 45CrН2MoV
Name The value
Designation GOST Cyrillic 45ХНМФА
Designation GOST Latin 45XHMFA
Transliteration 45HNMFA
By chemical elements 45CrНMoV

Description

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 sT|s0,2, MPa σU, 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
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU 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