Alloy ХН50ВМТКФЮ (ЭП57)

Designation

Name The value
Designation GOST Cyrillic ХН50ВМТКФЮ
Designation GOST Latin XH50BMTKFJu
Transliteration HN50VMTKFYu
By chemical elements CrNi50ВCuTeCoPAl
Name The value
Designation GOST Cyrillic ЭП57
Designation GOST Latin EP57
Transliteration EhP57
By chemical elements -

Description

Alloy ХН50ВМТКФЮ used: for the manufacture of hot-rolled bars; various items of aviation and engineering.

Standards

Name Code Standards
Bars and shapes В32 TU 14-1-223-72, TU 14-1-402-72

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu Al V B Ti Mo W Co
TU 14-1-402-72 0.08-0.14 ≤0.01 ≤0.015 ≤0.5 9-12 ≤0.5 Rest ≤5 ≤0.07 3.7-4.7 0.2-0.8 ≤0.02 2-2.8 4-6 5-7 14-16
TU 14-1-223-72 0.1-0.14 ≤0.01 ≤0.015 ≤0.5 9-12 ≤0.5 Rest ≤5 ≤0.07 3.7-4.7 0.2-0.8 ≤0.02 2-2.8 4-6 5-7 14-16
Ni is the basis.
According to TU 14-1-223-72 in the alloy, the introduction of cerium is possible up to 0.020%; the presence of antimony, tin, bismuth and arsenic is not allowed for 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 and rods, hot-rolled (20-55 mm) and machined (20-40 mm) TU 14-1-223-72. Annealing in air 1210-1230 °C (exposure 4 h) + Heating to 1040-1060 °C (exposure 4 h), air cooling + Ageing at 940-960 °C (exposure 8 h), air cooling
≥590 ≥9 ≥12 285-353

Description mechanical marks

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