Designation
| Name |
The value |
| Designation GOST Cyrillic |
08Х15Н25Т2МФР |
| Designation GOST Latin |
08X15H25T2MFP |
| Transliteration |
08H15N25T2MFR |
| By chemical elements |
08Cr15Н25Ti2MoVB |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП674 |
| Designation GOST Latin |
EP674 |
| Transliteration |
EhP674 |
| By chemical elements |
- |
Description
08Х15Н25Т2МФР steel is used: for the manufacture of high-load working and fasteners turbines and other power equipment.
Note
Dispersion-hardened steel.
Analogue is the steel Grade 660 ASTM SA-638/SA-638M.
Standards
| Name |
Code |
Standards |
| Processing of metals by pressure. Forgings |
В03 |
TU 14-1-1530-75, TU 14-1-2902-80 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Al |
V |
B |
Ti |
Mo |
Ce |
Zr |
| TU 14-1-2902-80 |
≤0.08 |
≤0.015 |
≤0.02 |
1.2-1.7 |
14-16 |
≤0.7 |
24-26 |
Rest |
≤0.3 |
0.2-0.4 |
≤0.01 |
1.9-2.4 |
1.1-1.6 |
≤0.01 |
≤0.01 |
Fe is the basis.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
KCU, kJ/m2 |
HB, MPa |
| Forgings on the other 14-1-2902-80. Quenching in oil with 970-990 °C (exposure 2 hours) + Aging at 710-730 °C (aging 16 h), air cooling |
|
≥610 |
≥880 |
≥16 |
≥20 |
≥490 |
269-341 |
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 |
