4X5MFS steel
4X5MFS Steel
Steel 4X5MFS: 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 grade — Steel 4Kh5MFS.
General information about 4X5MFS steel
| Substitute for the brand |
| Steel grade: 4Х5МФ1С, 4Х4ВМФС. |
| Delivery type |
| Round 4h5mfs, sheet 4h5mfs, bars, including shaped: GOST 5950−73, GOST 2590−71, GOST 2591−71. Calibrated bar GOST 5950−73, GOST 7417−75, GOST 8559−75, GOST 8560−78. Grinded rod and silversilver GOST 5950−73, GOST 14955−77. Strip GOST 4405−75. Forged and forged blanks GOST 5950−74, GOST 1133−71, GOST 7831−78. |
| Application |
| Small hammer dies, large (section greater than 200 mm) hammer and press inserts during hot deformation of structural steels and nonferrous alloys in terms of large-scale production, die casting molds of aluminum as well as zinc and magnesium alloys. |
Chemical composition of 4X5MFS steel
| Chemical element |
% |
| Vanadium (V) |
0.30−0.50 |
| Silicon (Si) |
0.90−1.20 |
| Manganese (Mn) |
0.20−0.50 |
| Copper (Cu), not more |
0.30 |
| Molybdenum (Mo) |
1.20−1.50 |
| Nickel (Ni), not more than |
0.35 |
| Sulfur (S), max. |
0.030 |
| Carbon (C) |
0.32−0.40 |
| Phosphorus (P), not more than |
0.030 |
| Chrome (Cr) |
4.50−5.50 |
Mechanical properties of 4X5MFS steel
Mechanical properties depending on tempering temperature
| t tempering temperature, °C |
σ0, 2, MPa |
σB, MPa |
δ5, % |
ψ, % |
KCU, J/m2 |
HRCe |
| Tempering at 1000 °C in oil. Tempering temperature 2 h. |
| 500 |
1420 |
1720 |
12 |
45 |
49 |
50 |
| 550 |
|
1670 |
10 |
50 |
56 |
48 |
| 600 |
1350 |
1490 |
13 |
53 |
59 |
45 |
| 650 |
960 |
1080 |
15 |
60 |
79 |
34 |
Mechanical properties as a function of test temperature
| t test temperature,°C |
σ0, 2, MPa |
σB, MPa |
δ5, % |
ψ, % |
KCU, J/m2 |
HRCe |
| Tempering at 1000 °C, oil. Tempering at 560 °C, 2 h. |
| 20 |
1570 |
1710 |
12 |
54 |
51 |
50 |
| 300 |
1320 |
1540 |
12 |
48 |
61 |
50 |
| 400 |
1270 |
1470 |
12 |
49 |
62 |
52 |
| 500 |
1130 |
1370 |
10 |
52 |
55 |
47 |
| 550 |
1160 |
1290 |
12 |
50 |
50 |
44 |
Technological properties of 4X5MFS steel
| Forging temperature |
| Beginning 1180, the end 850. Delayed cooling in the wells. |
Steel 4Х5МФС critical point temperature
| Critical point |
°С |
| Ac1 |
840 |
| Ac3 |
870 |
| Ar3 |
810 |
| Ar1 |
735 |
| Mn |
300 |
Impact toughness of 4X5MFS steel
Impact toughness, KCU, J/cm2
| Delivery condition, heat treatment |
+20 |
-40 |
-70 |
| Hardening, tempering 600 C. |
29 |
20 |
10 |
Steel hardness 4Х5МФС
| Delivery condition, heat treatment regime |
HRCэ surface |
HB |
| Ruts and strips annealed or high-temperatured |
|
241 |
| Samples. Hardening 1000−1020 C, oil. Tempering 550 C. |
St. 48 |
|
| Heating at 700−750 С. Tempering at 1000−1020°C. Tempering 530−560 С. Tempering 500−520 С (final heat treatment mode) |
49−51 |
|
Physical properties of 4X5MFS steel
| Temperature of test, °C |
20 |
100 |
200 |
300 |
400 |
500 |
600 |
700 |
800 |
900 |
| Steel density, pn, kg/m3 |
7750 |
7724 |
7697 |
7670 |
7641 |
7600 |
7573 |
7546 |
7520 |
7495 |
| Thermal conductivity coefficient W/(m — °C) |
29 |
30 |
30 |
31 |
33 |
31 |
30 |
28 |
26 |
27 |
| Electrical resistivity (p, nominal value — m) |
480 |
|
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Heat resistance, red resistance of 4X5MFS steel
Heat resistance
| Temperature, °C |
Time, h |
Hardness, HRCэ |
| 590 |
2 |
47 |
