Designation
| Name |
The value |
| Designation GOST Cyrillic |
ХН70ВМФТЮ |
| Designation GOST Latin |
XH70BMFTJu |
| Transliteration |
HN70VMFTYu |
| By chemical elements |
CrNi70ВCuPTeAl |
| Name |
The value |
| Designation GOST Cyrillic |
ЭИ826 |
| Designation GOST Latin |
EI826 |
| Transliteration |
EhI826 |
| By chemical elements |
- |
Description
Alloy ХН70ВМФТЮ used: for the manufacture of hot-rolled bars; parts of the energy and aeronautical 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 |
Ce |
| TU 14-1-402-72 |
≤0.12 |
≤0.009 |
≤0.015 |
≤0.5 |
13-16 |
≤0.6 |
Rest |
≤5 |
≤0.07 |
2.4-2.9 |
0.2-1 |
≤0.015 |
1.7-2.2 |
2.5-4 |
5-7 |
≤0.02 |
| TU 14-1-223-72 |
0.04-0.1 |
≤0.009 |
≤0.015 |
≤0.5 |
13-16 |
≤0.6 |
Rest |
≤5 |
≤0.07 |
2.4-2.9 |
0.2-1 |
≤0.02 |
1.7-2.2 |
2.5-4 |
5-7 |
≤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 and rods, hot-rolled (20-55 mm) and machined (20-40 mm) TU 14-1-223-72. Hardening in air, 1200-1220 °C (exposure 2 hours) + Heating to 1040-1060 °C (exposure 4 h), air cooling + Ageing at 790-810 °C (aging 16 h), air cooling |
|
≥590 |
≥8 |
≥12 |
269-341 |
|
≥640 |
≥12 |
≥18 |
- |
Description mechanical marks
| Name |
Description |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
| HB |
Brinell hardness number |
