Alloy ХН55МБЮ used: for the production of semi-finished products (forgings, rods, hot rolled sheets, pipes), intended for the manufacture of parts of gas turbine engines and plants; equipment engineering; pipeline fittings AC.

Note

High-temperature Nickel-based alloy.
The recommended maximum operating temperature for limited time +900 °C.
The temperature of beginning of intensive scaling in air +1100 °C.

Standards

Name	Code	Standards
Thermal and thermochemical treatment of metals	В04	ST ЦКБА 016-2005
Blanks. Of the workpiece. Slabs	В31	TU 14-1-1214-75, TU 14-1-3626-83
Bars and shapes	В32	TU 14-1-2606-79
Sheets and strips	В53	TU 14-1-3191-81
Processing of metals by pressure. Forgings	В03	TU 14-1-3628-83

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	N	Al	Mo	Nb	Ce
TU 14-1-3626-83	≤0.6	≤0.015	≤0.015	≤0.8	16.5-18.5	≤0.5	Rest	10.5-15	≤0.03	1.2-1.8	8.5-10	1.5-2.5	0.01-0.02
TU 14-1-2606-79	≤0.6	≤0.02	≤0.02	≤0.8	16.5-18.5	≤0.5	Rest	10.5-15	≤0.03	1.2-1.8	8.5-10	1.5-2.5	-

Ni is the basis.
According to TU 14-1-2606-79, the chemical composition is given for the alloy of the grade KhN55MBY-VD (EP666-VD).
According to TU 14-1-3626-83, the chemical composition is given for the alloy grade KhN55MBY-VD (EP666-VD). Cerium is introduced into the metal by calculation and chemical analysis is not determined. The nitrogen content is determined in the finished metal. In the finished metal, the deviation from the chemical composition according to the carbon content is +0.010%, iron -1.0%. In the finished metal, a residual titanium content of not more than 0.20% is allowed. The deviation in titanium is +0.10%. In the finished rolled products, the presence of tungsten content not exceeding 0.20% and copper not exceeding 0.070%

Mechanical properties

Section, mm	s_T\|s_0,2, MPa	σ_U, MPa	d₅, %	y, %	KCU, kJ/m²
The bars as supplied on the other 14-1-2606-79 (longitudinal samples)
3.4-3.7	≥600	≥1050	≥20	≥30	245-490
3.4-3.7	≥450	≥500	≥25	≥30	-
Tubular billet on the other 14-1-3626-83. Annealing in air of 980±20 °C (exposure for 1 h) and Aging at 730±20 °With (extract 15 h) cooling with the furnace to 650±20 °C (exposure for 10 h), air cooling (longitudinal samples)
20-25	≥590	≥1030	≥20	-	-
20-25	≥441	≥590	≥25	-	-

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

Technological properties

Name	The value
Macrostructure and pollution	The macrostructure of billets on the other 14-1-3626-83 should not have shrinkage and looseness, bubbles, cracks, inclusions and delaminations are visible to the naked eye. Under the control of the workpiece on the transverse templet allowed: Central porosity - less than 1 point, point heterogeneity - no more than 2 points; - phase separation in the square - not more than 1 score. Contamination of metal non-metallic inclusions shall not exceed the maximum score: - oxides of point - 1.5 points; - oxides of stroke - 1.0 points; - silicates fragile - 1.0 points; - silicates plastic - 1.0 points; - silicates nodetoreplace - 1.0 points; - sulphides - 1.0 points. Nitrides and carbonitride monitored and actual results are recorded in the certificate of quality.

Alloy ХН55МБЮ (ХН63М9Б2Ю; ЭП666)

Designation

Description