HN70VMTYU (EI617, HN70VMTYu-VI, EI617-VI)
for the workers and the nozzle vanes of gas turbines
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Heat resistant steels and alloys |
Heat resistant alloys |
Chemical composition
| Standard |
Fe, % |
Si, % |
B, % |
Mn, % |
Cr, % |
Ti, % |
Ni, % |
V, % |
Al, % |
Ce, % |
P, % |
C, % |
S, % |
Mo, % |
W, % |
|---|
| GOST 5632-72 |
< 5 |
< 0.7 |
< 0.02 |
< 0.5 |
13–16 |
1.8–2.3 |
61.5–76.4 |
0.1–0.5 |
1.7–2.3 |
< 0.02 |
< 0.02 |
< 0.12 |
< 0.02 |
2–4 |
5–7 |
Information on suppliers
Mechanical properties at 800 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\psi$$, % |
d5, % |
Treatment |
|---|
| Rod |
GOST 23705 - 79 |
|
|
|
670–690 |
8–10 |
3–7 |
Quenching and aging |
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
| Rod |
GOST 23705 - 79 |
Hardening, aging |
299–341 |
Technological Properties
| Weldability |
|---|
| Difficult to weld |
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| B |
% |
Bor |
| Mn |
% |
Manganese |
| Cr |
% |
Chrome |
| Ti |
% |
Titan |
| Ni |
% |
Nickel |
| V |
% |
Vanadium |
| Al |
% |
Aluminium |
| Ce |
% |
Cerium |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
| Mo |
% |
Molybdenum |
| W |
% |
Tungsten |
Description of mechanical properties
| Parameter |
Units of measurement |
Description |
| d5 |
% |
Elongation at break |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
| $$\psi$$ |
% |
Reduction in cross section on fracture |
Designation of types of weldability
| Parameter |
Units of measurement |
Description |
| no limits |
|
Welding is performed without heating and without subsequent heat treatment |
| Boundedly welded |
|
Welding is possible with heating up to 100–120 °C and subsequent heat treatment |
| Difficult to weld |
|
For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing |
| Not applicable for welded structures |
|
|