Steel 06Х14Н6Д2МБТ (ЭП817)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
06Х14Н6Д2МБТ |
| Designation GOST Latin |
06X14H6D2MBT |
| Transliteration |
06H14N6D2MBT |
| The chemical elements |
06Cr14Н6Cu2MoNbTi |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП817 |
| Designation GOST Latin |
EP817 |
| Transliteration |
EhP817 |
| The chemical elements |
- |
Description
06Х14Н6Д2МБТ steel is used: for the production of long products and forgings; parts and components of special-purpose machinery; aircraft loaded assemblies operating at temperatures from -70 °C to +300 °C obsecenities conditions in contact with the fuel.
Note
Steel corrosion-resistant martensitic class.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and general norms |
В20 |
OST 1 90005-91 |
| Bulls. Blanks. Slabs |
В31 |
TU 1-92-67-82 |
| Sectional and shaped rolling |
В32 |
TU 14-1-2407-78 |
| Metal forming. Forgings |
В03 |
TU 14-1-2996-80 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
Ti |
Mo |
Nb |
Ca |
Ce |
Co |
La |
| TU 14-1-2996-80 |
0.05-0.08 |
≤0.02 |
≤0.02 |
0.1-1 |
13.5-15 |
0.05-0.7 |
5.05-6 |
The rest |
1.8-2.2 |
0.02-0.15 |
0.8-1.6 |
0.03-0.45 |
0.002-0.1 |
0.02-0.2 |
- |
0.01-0.1 |
| TU 14-1-2407-78 |
0.01-0.07 |
≤0.018 |
≤0.02 |
≤1 |
13-14.8 |
≤0.7 |
5.8-6.8 |
The rest |
1.8-2.5 |
0.03-0.1 |
1.4-1.7 |
0.25-0.4 |
≤0.005 |
≤0.05 |
≤0.3 |
≤0.05 |
Fe is the basis.
According to TU 14-1-2407-78 the chemical composition is given for steel grade 06H14N6D2MBT-III. Cerium, lanthanum and calcium are introduced by calculation and their sum is Ce + La + Ca ≤ 0.10%.
According to TU 14-1-2996-80 the chemical composition is given for steel grade 06H14N6D2MBT.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
Brinell hardness number, MPa |
HRC |
| Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91 |
| - |
- |
1230-1370 |
- |
- |
- |
363-401 |
36-40 |
| Stamping of steel grade 06Х14Н6Д2МБТ-W on the other 1-92-67-82. Quenching in water or in air 1000±10 °C (aging of 0.5-1.0 h) + cold Treatment (-70 °C) 2 hours or (-50 °C) - 4 hours + aged at 505-525 °C (exposure 1-2 hours) |
|
≥930 |
≥1230 |
≥8 |
≥45 |
≥587 |
- |
- |
|
≥930 |
≥1230 |
≥10 |
≥55 |
≥785 |
- |
- |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
| kJ/m2 |
Toughness |
| HRC |
Rockwell hardness (indenter diamond spheroconical) |
Technological properties
| Name |
The value |
| Microstructure |
Introduction to steel ~1.5 % Mo, the inhibitory diffusion processes along the grain boundaries move the selection start carbide mesh higher temperatures, which causes the separation of these areas in the heat affected zone in a welded connection. Control of the microstructure on the other 1-92-67-82 on the content of Delta-ferrite is carried out in accordance with the standards developed by VIAM and agreed with the metal suppliers and consumers of forgings. |
| Features of heat treatment |
On the other 1-92-67-82 stamping are delivered after a single or double annealing at a temperature of 660±10 °With not less than 6 hours. By agreement of the parties allowed the annealing at a temperature of 660±20 °C. By agreement of the parties it is possible to supply forgings in obezvojennom state, thus obezvrezivate annealing is performed according to the mode: step 1 - extract 3 hours at a temperature of 850 °C, air cooling; 2nd stage - exposure depending on the cross section at 500 °C (exposure time depending on the cross section of forgings: mm -8 21-30 hours; 31-40 mm, 12 hours; 41-50 mm - 16 hours; 51-60 mm to 20 hours; 61-70 mm - 25 hours; 71-80 mm - 32 hours). |
| Corrosion resistance |
Steel has a high resistance of welded joints to stress corrosion cracking under tension. |
| Frost resistance |
Steel in comparison with analogues has a much higher viscosity at low temperatures (to -70 °C). |
