5XGM steel
5CrNiGM steel
Steel 5KhGM: Handbook of steels and alloys. Below is systematized information on the purpose, chemical composition, types of supply, substitutes, critical point temperatures, physical, mechanical, technological and foundry properties for the grade — Steel 5KhGM.
General information about 5XGM steel
| The substitute for the following steel grades |
| Steel grades: 5XHNM, 5XHNV, 6XVS, 5XNSV, 5XGSVFU. |
| Delivery type |
| Sections, 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. Forgings and forged blanks GOST 5950−74, GOST 1133−71, GOST 7831−78. |
| Application |
| Forging dies of steam and pneumatic hammers with a mass of falling parts to 3 tons, forging dies for hot forging, large, medium and small-section mills for rolling solid metal. |
Chemical composition of 5XGM steel
| Chemical element |
% |
| Silicon (Si) |
0.25−0.60 |
| Manganese (Mn) |
1.20−1.60 |
| Copper (Cu), not more than |
0.30 |
| Molybdenum (Mo) |
0.15−0.30 |
| Nickel (Ni), max. |
0.35 |
| Sulfur (S), max. |
0.030 |
| Carbon (C) |
0.50−0.60 |
| Phosphorus (P), not more than |
0.030 |
| Chromium (Cr) |
0.60−0.90 |
Mechanical properties of 5CrNiGM steel
Mechanical properties depending on tempering temperature
| Section, mm |
tempering temperature, °C |
σB, MPa |
δ5, % |
ψ, % |
KCU, J/m2 |
HB |
HRCe |
| 820−850°C hardening, oil. |
| <100 |
410−440 |
1570 |
5 |
15 |
20 |
|
44−48 |
| 100−300 |
490−520 |
1420 |
10 |
|
29 |
387−444 |
|
| 300−400 |
530−560 |
1250 |
10 |
32 |
44 |
363−387 |
|
Mechanical properties as a function of test temperature
| t test temperature,°C |
σ0, 2, MPa |
σB, MPa |
δ5, % |
ψ, % |
KCU, J/m2 |
HB |
HRCe |
| Tempering at 850 °C, oil. Tempering at 450 °C, 2h. |
| 20 |
1450 |
1570 |
9 |
26 |
36 |
|
47 |
| 400 |
1080 |
1280 |
11 |
40 |
44 |
|
37 |
| 500 |
860 |
980 |
15 |
55 |
|
|
32 |
| 600 |
390 |
700 |
25 |
80 |
40 |
|
27 |
| Billet diameter 20 mm. Tempering 850 °C, oil Tempering 500−550 °C. |
| 200 |
1030 |
1220 |
|
31 |
59 |
360 |
|
| 300 |
980 |
1180 |
12 |
48 |
64 |
330 |
|
| 400 |
850 |
980 |
10 |
62 |
49 |
310 |
|
| 500 |
680 |
780 |
12 |
81 |
34 |
302 |
|
Technological properties of 5XGM steel
| Forging temperature |
| Beginning temperature is 1200, the end temperature is 800. Sections up to 100 mm are cooled in the air, 101−350 mm — in the pit. |
| Weldability |
| Not applicable for welded constructions. |
| Machinability |
| In the hot-rolled condition at HB 207 and σB = 900 MPa Kυ dv.spl. = 0.6, Kυ b.st. = 0.3. |
| The tempering capacity |
| inclined |
| Flocken-sensitivity |
| sensitive |
Temperature of critical points of 5XGM steel
| Critical point |
°С |
| Ac1 |
700 |
| Ac3 |
800 |
| Ar3 |
700 |
| Mn |
220 |
Steel hardness 5KhGM
| Delivery condition, heat treatment regime |
HRCэ surface |
HB |
| Annealed or high-temperature bars and strips |
|
241 |
| Samples. Hardened 820−850 C, oil. |
St. 57 |
|
| Quenched at 820−850 C, oil for small hammer dies. Section up to 300 mm. Tempering 490−520 C, air |
|
387−444 |
| Quenching 820−850 C, oil for medium hammer dies. Section up to 400 mm. Tempering 530−560 C, air |
|
363−387 |
| Quenching at 820−850 C, oil for large hammer dies. Cross-section over 400 mm. Tempering 580−620 C, air |
|
302−341 |
| Tempering 700−750 C. Tempering 820−850 С, oil. Tempering at 410−440°C (final heat treatment) |
44−48 |
|
| Heating at 700−750°C. Tempering at 820−850 C, oil. Tempering 480−540 C (final heat treatment mode) |
40−43 |
|
Heat resistance, red resistance of 5XGM steel
Heat resistance
| Temperature, °C |
Time, h |
Hardness, HRCэ |
| 350−375 |
|
47 |
