EP648-VI (HN50VMTYUB-VI)
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Corrosion-resistant alloys and steels |
Corrosion-resistant heat-resistant steel |
Chemical composition
| Standard |
Fe, % |
Si, % |
B, % |
Mn, % |
Cr, % |
Ti, % |
Ni, % |
Al, % |
Ce, % |
P, % |
C, % |
S, % |
Nb, % |
Mo, % |
W, % |
|---|
| TU 14-1-1052-74 |
< 4 |
< 0.4 |
< 0.008 |
< 0.5 |
32–35 |
0.5–1.1 |
48.037–59.9 |
0.5–1.1 |
< 0.03 |
< 0.015 |
< 0.1 |
< 0.01 |
0.5–1.1 |
2.3–3.3 |
4.3–5.3 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$\alpha\cdot 10^{6}$$, $$K^{-1}$$ |
$$\varkappa$$, $$\frac{W}{m\cdot K}$$ |
$$\rho$$, $$\frac{kg}{m^3}$$ |
Cp, Дж/кг·К |
|---|
| 20 |
11.1–17.1 |
55–65 |
8050 |
456 |
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{Y}$$, $$MPa$$ |
d5, % |
Treatment |
|---|
| Round |
TU 14-1-1072-74 |
40 |
Transverse |
raw, hot rolling, fat, Transverse |
1000–1050 |
600–650 |
30–35 |
|
Твёрдость по Роквеллу
| Rolling |
Standard |
Classifiers |
Value, HRC |
| Round |
TU 14-1-1072-74 |
raw, hot rolling, fat, Transverse |
42–47 |
Technological Properties
| Weldability |
Flake Susceptibility |
Propensity to temper brittleness |
|---|
| Boundedly welded |
insensitive |
loathsome |
Heat Treatment Modes
| Treatment |
|---|
| Heating up to 1130-1150 ° С (holding for 1 hour), cooling in air + Aging at 880-920 ° С (holding for 16 hours), cooling in air |
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| B |
% |
Bor |
| Mn |
% |
Manganese |
| Cr |
% |
Chrome |
| Ti |
% |
Titan |
| Ni |
% |
Nickel |
| Al |
% |
Aluminium |
| Ce |
% |
Cerium |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
| Nb |
% |
Niobium |
| Mo |
% |
Molybdenum |
| W |
% |
Tungsten |
Description of physical characteristics
| Parameter |
Units of measurement |
Description |
| Cp |
Дж/кг·К |
Specific heat of material |
| $$\alpha\cdot 10^{6}$$ |
$$K^{-1}$$ |
Coefficient of thermal (linear) expansion (range 20°C–T) |
| $$\varkappa$$ |
$$\frac{W}{m\cdot K}$$ |
Coefficient of thermal conductivity (the heat capacity of the material) |
| $$\rho$$ |
$$\frac{kg}{m^3}$$ |
The density of the material |
Description of mechanical properties
| Parameter |
Units of measurement |
Description |
| d5 |
% |
Elongation at break |
| $$\sigma_{Y}$$ |
$$MPa$$ |
Yield strength |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
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 |
|
|