Steel 06Х14Н6Д2МБТ (ЭП817)
|Designation GOST Cyrillic||06Х14Н6Д2МБТ|
|Designation GOST Latin||06X14H6D2MBT|
|By chemical elements||06Cr14Н6Cu2MoNbTi|
|Designation GOST Cyrillic||ЭП817|
|Designation GOST Latin||EP817|
|By chemical elements||-|
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.
Steel corrosion-resistant martensitic class.
|Classification, nomenclature and General rules||В20||OST 1 90005-91|
|Blanks. Of the workpiece. Slabs||В31||TU 1-92-67-82|
|Bars and shapes||В32||TU 14-1-2407-78|
|Processing of metals by pressure. Forgings||В03||TU 14-1-2996-80|
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.
|Section, mm||sT|s0,2, MPa||σU, MPa||d5, %||y, %||KCU, kJ/m2||HB, MPa||HRC|
|Gradation of performance properties of the finished heat-treated parts for OST 1 90005-91|
|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)|
Description mechanical marks
|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|
|HB||Brinell hardness number|
|HRC||Rockwell hardness (indenter diamond spheroconical)|
|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||Steel in comparison with analogues has a much higher viscosity at low temperatures (to -70 °C).|