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 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

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	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	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 properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²	HB, 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
s_T\|s_0,2	Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σ_U	Limit short-term strength
d₅	Elongation after rupture
y	The relative narrowing
KCU	Toughness
HB	Brinell hardness number
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	Steel in comparison with analogues has a much higher viscosity at low temperatures (to -70 °C).

Steel 06Х14Н6Д2МБТ (ЭП817)

Designation

Description