Designation
| Name |
The value |
| Designation GOST Cyrillic |
38Х2НМ |
| Designation GOST Latin |
38X2HM |
| Transliteration |
38H2NM |
| By chemical elements |
38Cr2НMo |
Description
Steel 38Х2НМ applies: critical parts of heavy and transport engineering type axles, shafts etc. highly loaded parts and parts used in low temperatures.
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Mo |
|
0.32-0.42 |
≤0.03 |
≤0.03 |
0.5-0.8 |
1.8-2.3 |
0.17-0.37 |
0.6-0.9 |
0.2-0.3 |
Chemical composition is not verified by NTD. Total verified brands for chemical compositions: 2972 from 3363.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
HB, MPa |
| Annealing 850 - 870°C,The Release Of The 590 - 620°C. |
| 300-500 |
580 |
740 |
12 |
35 |
450 |
- |
| Forging. Hardening 850-870 °C. Leave 590-620 °C. KCU (+20/-40) |
| 300-500 |
580 |
740 |
12 |
35 |
45/30 |
235 |
| Hardening 870-890 °C. The Vacation 620-630 °C. |
| 500-800 |
680-720 |
800-860 |
16-20 |
58-65 |
80-120 |
321 |
| Annealing 850 - 870°C,The Release Of The 590 - 620°C. |
| 500-800 |
530 |
700 |
10 |
30 |
400 |
- |
| Forging. Hardening 850-870 °C. Leave 590-620 °C. KCU (+20/-40) |
| 500-800 |
530 |
700 |
10 |
30 |
40/30 |
223 |
| Hardening 870-890 °C. the Vacation 640-650 °C. KCU (+20/-40) |
| 270-300 |
700-830 |
820-950 |
10-20 |
52-70 |
80-120/50-80 |
269 |
| Annealing 850 - 870°C,The Release Of The 590 - 620°C. |
| 300 |
680 |
830 |
12 |
38 |
500 |
- |
| Forging. Hardening 850-870 °C. Leave 590-620 °C. KCU (+20/-40) |
| 300 |
680 |
830 |
12 |
38 |
50/35 |
255 |
| Hardening 870-890 °C. the Vacation 640-650 °C. KCU (+20/-40) |
| 270 |
600-650 |
720-780 |
18-21 |
58-64 |
100-120 |
237 |
| Normalization Of 870 °C. The Vacation Of 640 °C. |
| 600 |
600-740 |
700-740 |
21 |
54-60 |
80-120 |
207 |
| Castings according to GOST 2685-75 |
| - |
680 |
830 |
12 |
38 |
500 |
- |
| Normalization of 870-890 °C, air. Vacation 620-630 °C. KCU (+20/-40) |
| 100-300 |
440 |
635 |
14 |
40 |
54/40 |
235 |
| 300-500 |
440 |
635 |
13 |
35 |
50/35 |
235 |
| 500-800 |
440 |
635 |
12 |
30 |
40/30 |
235 |
| 100 |
440 |
635 |
16 |
45 |
59/50 |
235 |
Description mechanical marks
| Name |
Description |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
| KCU |
Toughness |
| HB |
Brinell hardness number |
Technological properties
| Name |
The value |
| Склонность к отпускной хрупкости |
inclined |
| The temperature of forging |
Start - 1200 °C, the end of - 900 °C. |
| Flock-sensitive sensitivity |
sensitive |
