Steel 40Kh5MF
40Cr5MoV Steel
Steel 40Kh5MF: Handbook of steels and alloys. Below is systematized information on the purpose, chemical composition, types of supply, substitutes, critical point temperature, physical, mechanical, technological and foundry properties for the brand — Steel 40Kh5MF.
General information about steel 40X5MF
| Grade substitute |
| steel 3Х2В8Ф |
| Application |
| Important parts of press and stamping tools with high strength properties after normalization and tempering: bushings of containers, rings, press studs, needles and other parts operating at temperatures up to 500 ° C. |
Chemical composition of 40X5MF steel
| Chemical element |
% |
| Vanadium (V) |
0.40−0.60 |
| Silicon (Si) |
0.17−0.37 |
| Manganese (Mn) |
0.50−0.80 |
| Molybdenum (Mo) |
1.20−1.60 |
| Nickel (Ni), max. |
0.30 |
| Sulfur (S), not more than |
0.030 |
| Carbon (C) |
0.35−0.45 |
| Phosphorus (P), not more than |
0.030 |
| Chrome (Cr) |
4.50−5.50 |
Mechanical properties of 40X5MF steel
Mechanical properties depending on test temperature
| t test temperature, °C |
σ0, 2, MPa |
σB, MPa |
δ5, % |
HB |
| Forgings up to 400 mm cross section. Normalization 990−1010°C, air. Double tempering 550−580°C, cooling with furnace. |
| 20 |
1300 |
1400 |
7 |
388−444 |
| 450 |
1050 |
1200 |
8 |
|
| 500 |
1000 |
1150 |
8 |
|
| Double tempering 550−560°C, cooling with furnace. |
| 20 |
1500 |
1600 |
7 |
|
| 450 |
1250 |
1400 |
7 |
|
| 500 |
1150 |
1300 |
7 |
|
Technological properties of 40X5MF steel
| Forging temperature |
| Beginning 1200, end 900. |
| Weldability |
| hardly weldable. |
| Tendency to tempering ability |
| Slightly inclined |
| Flockensitive |
| low sensitivity |
Temperature of 40X5MF steel critical points
| Critical point |
°С |
| Ac1 |
810 |
| Ac3 |
855 |
Hardenability of steel 40Kh5MF
Water hardened
| Distance from end face, mm / HRCe |
| 200 |
| 55 |
| Heat treatment |
Critical hardness, HRCe |
Distance from the end to be cooled |
| Water hardening. |
55 |
200 |
