Designation
| Name |
The value |
| Designation GOST Cyrillic |
07Х25Н16АГ6Ф |
| Designation GOST Latin |
07X25H16AG6F |
| Transliteration |
07H25N16AG6F |
| By chemical elements |
07Cr25Н16NMn6V |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП750 |
| Designation GOST Latin |
EP750 |
| Transliteration |
EhP750 |
| By chemical elements |
- |
Description
07Х25Н16АГ6Ф steel is used: for the manufacture of parts of special equipment stanovenou structures of complex shape, working in oxidizing environments at the operating temperature to +850 °C.
Note
Chroniclerussia steel.
Standards
| Name |
Code |
Standards |
| Blanks. Of the workpiece. Slabs |
В31 |
TU 14-1-1214-75 |
| Sheets and strips |
В33 |
TU 14-1-1644-76, TU 14-1-1731-76 |
| Bars and shapes |
В32 |
TU 14-1-911-74, TU 14-1-3109-81 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
N |
V |
Ce |
| TU 14-1-911-74 |
≤0.07 |
≤0.015 |
≤0.035 |
5-7 |
23-26 |
≤0.6 |
14-18 |
Rest |
0.3-0.45 |
0.2-0.5 |
≤0.2 |
Fe is the basis.
According to TU 14-1-911-74, the chemical composition is given for steel grade 07Х25Н16АГ6Ф-Ш (ЭП750-Ш). Permissible deviations in chemical composition: carbon +0.010%, vanadium -0.10%, silicon +0.10%, nitrogen -0.030%. Cerium is introduced into the metal by calculation and chemical analysis is not determined. It is allowed deoxidation of steel zirconium.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
y, % |
| Bars hot rolled and forged on the other 14-1-911-74. The longitudinal samples. Annealing in air or in water 1050-1150 °C (exposure for 0.5-1.0 hours) |
|
≥345 |
≥740 |
≥40 |
≥45 |
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 |
Technological properties
| Name |
The value |
| Weldability |
For welding apply welding electrodes OzL-9A (electrode type e-28Х-24Н16Г6, stem material SV-30S-25Н16Г7, the deposition rate of 13-14 g/Ah). |
| Macrostructure and pollution |
Macrostructure of steel hot rolled and forged bars on the other 14-1-911-74 on cross etched templeto should not be visible without using the magnifying devices of the traces of shrinkage, bubbles, captivity, cracks, fistulas, slag inclusions. The defects allowed for Central porosity, spot inhomogeneity, phase separation and to the square of podsadecki segregation should not exceed 1.0 points for each parameter in accordance with GOST 10243. |
| Particularities of production of goods |
Bars on the other 14-1-911-74 are supplied without heat treatment. |
