5CrNiM steel
5XHNM steel
Steel 5XHNM: 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 5KHNM.
General information about 5XHNM steel
| Substitute for the following grades |
| Steel grades: 5XHNV, 5XGM, 4XMFS, 5XHNVS, 4X5V2FS. |
| Delivery type |
| Forging 5хнм, circle 5хнм, sheet 5хнм, section rolled products, 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. GOST 4405−75 State Standard strip. Wire GOST 10543−82. Forged and forged blanks GOST 5950−74, GOST 1133−71, GOST 7831−78. |
| Application |
| Hammer dies of steam and pneumatic hammers with weight of falling parts over 3 tons, press dies and machine-speed stamping dies for hot deformation of light non-ferrous alloys, matrix blocks for inserts of horizontal forging machines. |
Chemical composition of 5CrNiM steel
| Chemical element |
% |
| Silicon (Si) |
0.10−0.40 |
| Manganese (Mn) |
0.50−0.80 |
| Copper (Cu), not more |
0.30 |
| Molybdenum (Mo) |
0.15−0.30 |
| Nickel (Ni) |
1.40−1.80 |
| Sulfur (S), max. |
0.030 |
| Carbon (C) |
0.50−0.60 |
| Phosphorus (P), not more than |
0.030 |
| Chromium (Cr) |
0.50−0.80 |
Mechanical properties of 5CrNiM steel
Mechanical properties depending on the section
| Section, mm |
σ0, 2, MPa |
σB, MPa |
δ5, % |
ψ, % |
KCU, J/m2 |
HB |
HRCe |
| Tempering at 850 °C, oil. Tempering at 460−520°C. |
| <100 |
|
|
|
|
|
|
57 |
| 100−200 |
1420 |
1570 |
9 |
35 |
34 |
375−429 |
42−47 |
| 200−300 |
1270 |
1470 |
11 |
38 |
44 |
352−397 |
40−44 |
| 300−500 |
1130 |
1320 |
12 |
36 |
49 |
321−375 |
37−42 |
| 500−700 |
930 |
1180 |
15 |
40 |
78 |
302−341 |
35−39 |
Technological properties of 5CrNiM steel
| Forging temperature |
| The beginning 1240, the end 750. 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 annealed condition at HB 286 and σB = 900 MPa Kυ of dv.spl. = 0.6, Kυ b.st. = 0.3. |
| Tendency to tempering ability |
| is not inclined |
| Floc-sensitivity |
| sensitive |
Steel 5CrNiM critical point temperature
| Critical point |
°С |
| Ac1 |
730 |
| Ac3 |
780 |
| Ar3 |
640 |
| Ar1 |
610 |
| Mn |
230 |
Steel hardness 5XHNM
| Delivery condition, heat treatment regime |
HRCe surface |
HB |
| Rings and strips annealed or high-temperatured |
|
241 |
| Samples. Hardening 850 C, oil. Tempering 550 C. |
36 |
|
| Tempering 700−750 C. Tempering 840−860 C, oil. Tempering 400−480 C (final heat treatment mode) |
44−48 |
|
| Preheating at 700−750°C. Tempering at 840−860 C, oil. Tempering 500−550 C (final heat treatment mode) |
40−43 |
|
| Tempering at 850 C. Tempering at 450 C. Test temperature 400 C. |
43 |
|
| Tempering at 850 C. Tempering at 450 C. Test temperature 500 C. |
39 |
|
| Tempering at 850 C. Tempering at 450 C. Test temperature 550 C. |
37 |
|
| Tempering at 850 C. Tempering at 450 C. Test temperature 600 C. |
26 |
|
| Tempering 850 C. Tempering 500 C. 400 °C test temperature. |
39 |
|
| Tempering at 850 °C. Tempering 450 C. Test temperature 500 C. |
28 |
|
| Tempering at 850 °C. Tempering at 450 C. Test temperature 600 C. |
26 |
|
Physical properties of 5CrNiM steel
| Test temperature, °С |
20 |
100 |
200 |
300 |
400 |
500 |
600 |
700 |
800 |
900 |
| Thermal conductivity coefficient W/(m — °C) |
|
38 |
40 |
42 |
42 |
44 |
46 |
|
|
|
| Electrical resistivity (p, nominal value — m) |
|
300 |
250 |
200 |
160 |
|
|
|
|
|
| Test temperature,°C |
20−100 |
20−200 |
20−300 |
20−400 |
20−500 |
20−600 |
20−700 |
20−800 |
20−900 |
20−1000 |
| Coefficient of linear expansion (a, 10−6 1/°C) |
|
12.6 |
|
|
|
14.2 |
|
|
|
|
Heat resistance, red resistance of 5XHM steel
Heat resistance
| Temperature, °C |
Time, h |
Hardness, HRCэ |
| 590 |
4 |
37 |
