Steel 3KH3M3F (ЭИ76)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
3Х3М3Ф |
| Designation GOST Latin |
3X3M3F |
| Transliteration |
3H3M3F |
| The chemical elements |
3Cr3Mo3V |
| Name |
The value |
| Designation GOST Cyrillic |
ЭИ76 |
| Designation GOST Latin |
EI76 |
| Transliteration |
EhI76 |
| The chemical elements |
- |
Description
3KH3M3 °F steel is used: for the manufacture of tool hot deformation at crank presses and horizontal forging machines exposed in the process of intensive cooling (usually small tools); moulds pressure casting of copper alloys.
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В22 |
GOST 1133-71, GOST 2590-2006, GOST 2591-2006 |
| Sheets and stripes |
В33 |
GOST 4405-75, TU 14-131-971-2001 |
| Sectional and shaped rolling |
В32 |
GOST 5950-2000, GOST 7417-75, GOST 8559-75, GOST 8560-78, GOST 14955-77, TU 14-11-245-88 |
| Bulls. Blanks. Slabs |
В31 |
OST 24.952.01-89 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| GOST 5950-2000 |
0.27-0.34 |
≤0.03 |
≤0.03 |
0.2-0.5 |
2.8-3.5 |
0.1-0.4 |
≤0.4 |
The rest |
≤0.3 |
0.4-0.6 |
≤0.03 |
2.5-3 |
≤0.2 |
Fe is the basis.
Mechanical characteristics
| Section, mm |
t отпуска, °C |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
HRC |
| Rolled steel. Quenching in oil with 1040 °C + Vacation at 600 °C (exposure 2 hours) |
|
- |
≥1470 |
≥1670 |
- |
≥50 |
≥220 |
- |
| Long products (samples). Quenching in oil from 1040 °C to + Leave (exposure 2 hours) |
| - |
500 |
≥1320 |
- |
≥14 |
≥45 |
≥490 |
≥49 |
| Long products (samples). Quenching in oil from 1040 °C to + Vacation at 600 °C (exposure 2 hours) |
| - |
- |
≥1470 |
≥1670 |
≥10 |
≥50 |
≥220 |
≥49 |
| Long products (samples). Quenching in oil from 1040 °C to + Leave (exposure 2 hours) |
| - |
550 |
≥1310 |
- |
≥13 |
≥51 |
≥290 |
≥49 |
| Long products (samples). Quenching in oil from 1040 °C to + Vacation at 600 °C (exposure 2 hours) |
| - |
- |
≥1270 |
≥1450 |
≥10 |
≥50 |
≥610 |
≥48 |
| Long products (samples). Quenching in oil from 1040 °C to + Leave (exposure 2 hours) |
| - |
600 |
≥1290 |
≥1670 |
≥10 |
≥51 |
≥220 |
≥48 |
| Long products (samples). Quenching in oil from 1040 °C to + Vacation at 600 °C (exposure 2 hours) |
| - |
- |
≥1210 |
≥1370 |
≥10 |
≥50 |
≥610 |
≥48 |
| Long products (samples). Quenching in oil from 1040 °C to + Leave (exposure 2 hours) |
| - |
650 |
≥1270 |
≥1460 |
≥10 |
≥47 |
≥480 |
≥44 |
| Long products (samples). Quenching in oil from 1040 °C to + Vacation at 600 °C (exposure 2 hours) |
| - |
- |
≥1140 |
≥1270 |
≥10 |
≥51 |
≥550 |
≥44 |
| - |
- |
≥980 |
≥1130 |
≥12 |
≥54 |
≥500 |
≥35 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
| kJ/m2 |
Toughness |
| HRC |
Rockwell hardness (indenter diamond spheroconical) |
Physical characteristics
| Temperature |
Е, ГПа |
r, кг/м3 |
l, Вт/(м · °С) |
R, НОм · м |
| 0 |
207 |
7828 |
32 |
314 |
| 300 |
177 |
7754 |
36 |
515 |
| 100 |
- |
7808 |
34 |
365 |
| 200 |
- |
7783 |
36 |
430 |
| 400 |
- |
7721 |
36 |
600 |
| 600 |
- |
7642 |
34 |
835 |
| 700 |
- |
7597 |
34 |
965 |
| 800 |
- |
7565 |
33 |
1118 |
| 900 |
- |
7525 |
34 |
1151 |
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 |
| Forging temperature |
Start - 1180 °C, the end - 850 °C slow Cooling in the wells. |
