Alloy ХН51КВМТЮБ (JEP741NP)

Designation

Name The value
Designation GOST Cyrillic ХН51КВМТЮБ
Designation GOST Latin XH51KBMTJuB
Transliteration HN51KVMTYuB
By chemical elements CrNi51CoВCuTeAlBe
Name The value
Designation GOST Cyrillic ЭП741НП
Designation GOST Latin EP741HP
Transliteration EhP741NP
By chemical elements -

Description

Alloy ХН51КВМТЮБ used: for the manufacture of granules by hot isostatic pressing critical products (blank discs ДП242У, ДП243У, ДП244У, ДП286У, ДП287У, ДП288У and shaft ДП199У); elastic metal seals of detachable connections of liquid rocket engines.

Note

The granulated heat-resistant Nickel alloy.

Standards

Name Code Standards
Non-ferrous metals, including rare, and their alloys В51 GOST Р 52802-2007, TU 1-809-443-81, TU 1-809-30-88
Blanks. Of the workpiece. Slabs В31 TU 92-1-185-87, TU оп 1-809-265-87

Chemical composition

Standard C S P Mn Cr Si Ni Fe Al B Ti Mo Nb W Ce Zr Co Mg Hf
GOST Р 52802-2007 0.02-0.06 ≤0.009 ≤0.015 ≤0.5 8-10 ≤0.5 Rest ≤0.5 4.8-5.3 0.015 1.6-2 3.5-4.2 2.4-2.8 5.2-5.9 0.01 0.015 15-16.5 0.02 0.1-0.4
Ni is the basis.
According to GOST R 52802-2007 elements of boron, zirconium, cerium and magnesium are introduced by calculation and chemical analysis is not determined. When cerium is introduced in the form of misch metal, the calculation is made for the sum of rare-earth metals. Deviations of the chemical composition according to the content are allowed: iron - plus 0.50%, aluminum - plus 0.10%, boron - plus 0.005% (in the study of the chemical composition of boron). The content of residual elements in the finished alloy is in accordance with GOST 5632.

Mechanical properties

Section, mm sT|s0,2, MPa σU, MPa d y, % KCU, kJ/m2 HB, MPa
Blank disks and shafts on the other op 1-809-265-87 in the delivery condition. Hardening the compressed air 1200-1220 °C (endurance 4 hours) + First aging at 900-920 °C (extract 3 hours), cooling with the furnace to 750 °C, + Second-aged at 740-760 °C (exposure 8 h), air cooling. Allowed additional ageing at 750 °C (16 h exposure)
≥951 ≥1371 ≥15 ≥15 ≥392 302-388

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
d Elongation after rupture
y The relative narrowing
KCU Toughness
HB Brinell hardness number

Technological properties

Name The value
Weldability Is not welded.
Machinability Difficult.