Steel 4KHMFS (40ХСМФ)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
4ХМФС |
| Designation GOST Latin |
4XMFC |
| Transliteration |
4HMFS |
| The chemical elements |
4CrMoVС |
| Name |
The value |
| Designation GOST Cyrillic |
40ХСМФ |
| Designation GOST Latin |
40XCMF |
| Transliteration |
40HSMF |
| The chemical elements |
40CrСMoV |
Description
4KHMFS steel is used: for the manufacture of hammer stamps vapor and pneumatic hammers weighing falling parts to 3 t during the deformation of alloyed steels and stainless steels (instead of less heat-resistant steel grades 5KHNM, 5KHNV); extrusion tools for aluminium alloys; inserts and punches landing on horizontal forging machines.
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 |
0.37-0.45 |
≤0.03 |
≤0.03 |
0.5-0.8 |
1.5-1.8 |
0.5-0.8 |
≤0.4 |
The rest |
≤0.3 |
0.3-0.5 |
≤0.03 |
0.9-1.2 |
≤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 |
| Forming (samples). Quenching in oil from 950 °C to + Vacation at 550 °C |
| 500 |
- |
≥1280 |
≥1450 |
≥7 |
≥20 |
≥196 |
- |
| Long products (samples). Quenching in oil from 920 ° + Vacation (exposure 2 hours) |
| - |
300 |
≥1570 |
≥2060 |
≥10 |
≥41 |
- |
≥51 |
| Long products (samples). Quenching in oil from 920 ° + Vacation at 560 °C (exposure 2 hours) |
| - |
- |
≥1250 |
≥1390 |
≥11 |
≥44 |
- |
- |
| Long products (samples). Quenching in oil from 920 ° + Vacation (exposure 2 hours) |
| - |
400 |
≥1370 |
≥1660 |
≥11 |
≥38 |
- |
≥49 |
| Long products (samples). Quenching in oil from 920 ° + Vacation at 560 °C (exposure 2 hours) |
| - |
- |
≥1180 |
≥1310 |
≥12 |
≥49 |
- |
- |
| Long products (samples). Quenching in oil from 920 ° + Vacation (exposure 2 hours) |
| - |
500 |
≥1340 |
≥1610 |
≥12 |
≥47 |
- |
≥47 |
| Long products (samples). Quenching in oil from 920 ° + Vacation at 560 °C (exposure 2 hours) |
| - |
- |
≥1180 |
≥1270 |
≥13 |
≥55 |
- |
- |
| Long products (samples). Quenching in oil from 920 ° + Vacation (exposure 2 hours) |
| - |
600 |
≥1180 |
≥1260 |
≥14 |
≥53 |
- |
≥42 |
| Long products (samples). Quenching in oil from 920 ° + Vacation at 560 °C (exposure 2 hours) |
| - |
- |
≥950 |
≥1070 |
≥14 |
≥63 |
- |
- |
| Long products (samples). Quenching in oil from 920 ° + Vacation (exposure 2 hours) |
| - |
650 |
≥820 |
≥880 |
≥22 |
≥63 |
- |
≥30 |
| Stamp section up to 500 mm (samples). Quenching in oil from 950 °C to + Vacation at 550 °C (exposure 2 hours) |
| - |
- |
≥1280 |
≥1450 |
≥7 |
≥20 |
- |
- |
| - |
- |
≥1190 |
≥1340 |
≥8 |
≥27 |
- |
- |
| - |
- |
≥760 |
≥900 |
≥10 |
≥45 |
- |
- |
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) |
Technological properties
| Name |
The value |
| Forging temperature |
Start - 1150 °C, the end - 850 °C slow Cooling in the wells. |
