Designation
| Name |
The value |
| Designation GOST Cyrillic |
25ХГНМТ |
| Designation GOST Latin |
25XGHMT |
| Transliteration |
25HGNMT |
| By chemical elements |
25CrMnНMoTi |
| Name |
The value |
| Designation GOST Cyrillic |
25ХГНМТА |
| Designation GOST Latin |
25XGHMTA |
| Transliteration |
25HGNMTA |
| By chemical elements |
25CrMnНMoTi |
Description
25KHGNMT steel is used: for the manufacture of parts of devices operating on friction; details of auxiliary units of machines and devices.
Note
Structural steel quality homomorphically with molybdenum and titanium.
Standards
| Name |
Code |
Standards |
| Bars and shapes |
В32 |
GOST 4543-71, GOST 14955-77, TU 14-1-2118-77, TU 14-1-926-74, TU 14-11-245-88, TU 14-136-367-2008 |
| Bars and shapes |
В22 |
GOST 8319.0-75 |
| Blanks. Of the workpiece. Slabs |
В31 |
OST 3-1686-90, TU 14-1-4944-90 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
V |
Ti |
Mo |
W |
| GOST 4543-71 |
0.23-0.29 |
≤0.035 |
≤0.035 |
0.5-0.8 |
0.4-0.6 |
0.17-0.37 |
0.8-1.1 |
Rest |
≤0.3 |
≤0.05 |
0.04-0.09 |
0.4-0.5 |
≤0.2 |
Fe is the basis.
According to GOST 4543-71 the content in high-quality steel is regulated: P≤0,025%; S≤0.025%; Сu≤0.30%; in high-grade steel: P≤0,025%; S≤0.015%; Сu≤0.25%.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
| Rolled steel. Quenching in oil from 860 °C to + vacation at 190 °C, air cooling |
| 25 |
≥1080 |
≥1180 |
≥10 |
≥40 |
≥481 |
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 |
