Steel 38KH2NM
Description
Steel 38KH2NM
Steel 38Х2НМ: steels and alloys brand. Below is a systematized information about the purpose, chemical composition, types of supplies, substitutes, temperature of critical points, physical, mechanical, technological and casting properties for the brand — Steel 38X2NM.
General information about steel 38Х2НМ
| Substitute brand |
| steel: 34ХН1М, 40ХН2МА. |
| Delivery type |
| Forgings and forged billets TU 24.11.01.073−86. |
| Application |
| Critical parts of heavy and transport engineering such as axles, shafts and other highly loaded parts, as well as parts used in low temperatures. |
Chemical composition of steel 38Х2НМ
| Chemical element |
% |
| Silicon (Si) |
0.17−0.37 |
| Manganese (Mn) |
0.50−0.80 |
| Molybdenum (Mo) |
0.20−0.30 |
| Nickel (Ni) |
0.60−0.90 |
| Sulfur (S), no more |
0.030 |
| Carbon (C) |
0.32−0.42 |
| Phosphorus (P), no more |
0.030 |
| Chromium (Cr) |
1.80−2.30 |
Mechanical properties of steel 38Х2НМ
Mechanical properties of forgings
| Section, mm |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
KCU, J / m 2 |
HB |
| Forging. Hardening 850−870 ° C. Vacation 590−620 ° C. KCU (+ 20 / -40) |
| <300 |
680 |
830 |
12 |
38 |
50/35 |
255 |
| 300−500 |
580 |
740 |
12 |
35 |
45/30 |
235 |
| 500−800 |
530 |
700 |
ten |
thirty |
40/30 |
223 |
Mechanical properties depending on on the section of the forging and heat treatment mode
| Section, mm |
σ 0.2, MPa |
σ B, MPa |
δ 5 ,% |
ψ,% |
KCU, J / m 2 |
HB |
| Hardening 870−890 ° C. Vacation 640−650 ° C. KCU (+ 20 / -40) |
| <270 |
600−650 |
720−780 |
18−21 |
58−64 |
100−120 |
237 |
| 270−300 |
700−830 |
820−950 |
10−20 |
52−70 |
80−120 / 50−80 |
269 |
| Normalization 870−890 ° C, air. Vacation 620−630 ° C. KCU (+ 20 / -40) |
| <100 |
440 |
635 |
sixteen |
45 |
59/50 |
235 |
| 100−300 |
440 |
635 |
fourteen |
40 |
54/40 |
235 |
| 300−500 |
440 |
635 |
thirteen |
35 |
50/35 |
235 |
| 500−800 |
440 |
635 |
12 |
thirty |
40/30 |
235 |
| Hardening 870−890 ° C. Vacation 620−630 ° C. |
| 500−800 |
680−720 |
800−860 |
16−20 |
58−65 |
80−120 |
321 |
| Normalization 870 ° C. Vacation 640 ° C. |
| <600 |
600−740 |
700−740 |
21 |
54−60 |
80−120 |
207 |
Technological properties of steel 38Х2НМ
| Forging temperature |
| Beginning 1200, end 900. |
| Tendency to release ability |
| inclined |
| Flock sensitivity |
| sensitive |
Endurance limit of steel 38Х2НМ
| σ -1, MPa |
n |
σ B, MPa |
σ 0.2, MPa |
| 460 |
1E + 7 |
870 |
690 |
Hardenability of steel 38Х2НМ
Hardening 870 ° C.
| Distance from the end, mm / HRC e |
| 1.5 |
3 |
nine |
20 |
40 |
60 |
| 51−58 |
51−58 |
51−58 |
48−57 |
46−55 |
42−52 |
