Alloy KHN70MVTJUB (ЭИ598)

Designation

Name The value
Designation GOST Cyrillic ХН70МВТЮБ
Designation GOST Latin XH70MBTJuB
Transliteration HN70MVTYuB
By chemical elements CrNi70CuВTeAlBe
Name The value
Designation GOST Cyrillic ЭИ598
Designation GOST Latin EI598
Transliteration EhI598
By chemical elements -

Description

Alloy KHN70MVTJUB used: for the manufacture of hot-rolled bars; turbine blades, discs and other components of aircraft engines.

Note

High-temperature Nickel-based alloy.
The recommended maximum operating temperature for limited time +850 °C. the Temperature of beginning of intensive scaling in air to +1000 °C.

Standards

Name Code Standards
Bars and shapes В32 GOST 23705-79, TU 14-1-223-72, TU 14-1-402-72, TU 14-11-245-88
Classification, nomenclature and General rules В30 GOST 5632-72
Blanks. Of the workpiece. Slabs В31 OST 3-1686-90

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Al B Ti Mo Nb W Ce
TU 14-1-223-72 0.04-0.1 ≤0.01 ≤0.015 ≤0.5 16-19 ≤0.6 Rest ≤5 ≤0.07 1-1.7 ≤0.01 1.9-2.8 4-6 0.5-1.3 2-3.5 ≤0.02
TU 14-1-402-72 ≤0.12 ≤0.01 ≤0.015 ≤0.5 16-19 ≤0.6 Rest ≤5 ≤0.07 1-1.7 ≤0.01 1.9-2.8 4-6 0.5-1.3 2-3.5 ≤0.02
GOST 5632-72 ≤0.12 ≤0.01 ≤0.015 ≤0.5 16-19 ≤0.6 Rest ≤5 ≤0.3 1-1.7 ≤0.01 1.9-2.8 4-6 0.5-1.3 2-3.5 ≤0.02
Ni is the basis.
According to TU 14-1-223-72 in the alloy, the presence of antimony, tin, bismuth and arsenic is allowed for no more than 1 point of the spectral analysis scale. Boron and cerium are introduced into the metal by calculation and chemical analysis is not determined.

Mechanical properties

Section, mm σU, MPa d5, % y, % HB, MPa
Bars hot rolled and forged and according to GOST 23705-79, THE 14-1-223-72. Annealing in air 1190-1210 °C (maintained for 5 hours) + Heating to 1060-1080 (exposure 8 h), air cooling + Ageing at 790-810 °C (aging 16 h), air cooling
≥690 ≥6 ≥10 -
- - - 299-341
≥690 ≥10 ≥14 -

Description mechanical marks

Name Description
σU Limit short-term strength
d5 Elongation after rupture
y The relative narrowing
HB Brinell hardness number