Alloy ХН62БМКТЮ (ЭП742)

Designation

Name The value
Designation GOST Cyrillic ХН62БМКТЮ
Designation GOST Latin XH62BMKTJu
Transliteration HN62BMKTYu
By chemical elements CrNi62BeCuCoTeAl
Name The value
Designation GOST Cyrillic ЭП742
Designation GOST Latin EP742
Transliteration EhP742
By chemical elements -

Description

Alloy ХН62БМКТЮ used: for the production of disks of gas turbine engines ground-based (gas compressor units, gas turbine driven power plants).

Standards

Name Code Standards
Blanks. Of the workpiece. Slabs В31 OST 1 90367-85, TU 14-1-3998-85
Processing of metals by pressure. Forgings В03 TU 14-1-2617-79

Chemical composition

Standard C S P Mn Cr Si Ni Fe Al B Ti Mo Nb Ce Co La
TU 14-1-3998-85 0.04-0.08 ≤0.01 ≤0.015 ≤0.4 13-15 ≤0.3 Rest ≤1 2.4-2.8 ≤0.01 2.4-2.8 4.5-5.5 2.4-2.8 ≤0.01 9-11 ≤0.1
Ni is the basis.
According to TU 14-1-3998-85, the chemical composition is presented for the alloy ХН62БМКТЮ-ИД (ЭП742-ИД) of vacuum-arc remelting with smelting of the parent metal in a vacuum induction furnace. In the finished metal, deviations of the chemical composition are permissible: in titanium ± 0.10%, in aluminum ± 0.10%, in niobium ± 0.10%, in carbon -0.020%, in sulfur +0.0010%, in boron +0 , 0050%. Lanthanum, boron and cerium are introduced into the metal by calculation and chemical analysis are not determined. The content of residual elements of vanadium and tungsten is not more than 0.20% of each, the residual content of copper is not more than 0.070%.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d5, % y, % KCU, kJ/m2 HB, MPa
Forgings (washers) on the other 14-1-3998-85. Hardening in air, 1060-1100 °C (exposure 8 h) + Aging at 770-790 °C (aging 16 h), air cooling (samples tangential)
≥755 ≥1210 ≥13 ≥14 ≥294 302-376
Forgings (washers) on the other 14-1-3998-85. Annealing in air 1090-1120 °C (exposure 8 h) + Aging at 840-860 °C (exposure 6 h), air cooling + Ageing at 770-790 °C (aging 10-16 h), air cooling (samples tangential)
≥755 ≥1210 ≥13 ≥14 ≥294 302-376

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
KCU Toughness
HB Brinell hardness number