EP615 (XH77SR1)
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Heat resistant steels and alloys |
Heat resistant alloys |
Chemical composition
| Standard |
Fe, % |
Si, % |
B, % |
Mn, % |
Cr, % |
Ti, % |
Cu, % |
Ni, % |
Al, % |
P, % |
C, % |
S, % |
|---|
|
< 3 |
2.5–3 |
0.8–1.2 |
< 0.4 |
13–15 |
< 0.2 |
< 0.25 |
75.715–83.3 |
< 0.5 |
< 0.02 |
0.4–0.7 |
< 0.015 |
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 |
13–16 |
55.8–65.8 |
8050 |
456 |
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{0.2}$$, $$MPa$$ |
d5, % |
Treatment |
|---|
| Tape |
GOST 19241-80 |
1 |
Transverse |
raw, cold rolling, thin, Transverse |
800–850 |
580–630 |
0.5–1.5 |
|
Magnetic properties
| Rolling |
$$\mu_{max}$$, $$MH/m$$ |
$$P_{1.5/50}$$, $$W/kg$$ |
|---|
| Tape |
< 4000 |
1.5–1.6 |
Твёрдость по Роквеллу
| Rolling |
Standard |
Classifiers |
Value, HRC |
| Tape |
GOST 492-2006 |
half-firm, cold rolling, thin, Transverse |
40–45 |
Technological Properties
| Weldability |
Flake Susceptibility |
Propensity to temper brittleness |
|---|
| no limits |
not sensitive |
not inclined |
Critical point temperatures
Limit operating modes
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| B |
% |
Bor |
| Mn |
% |
Manganese |
| Cr |
% |
Chrome |
| Ti |
% |
Titan |
| Cu |
% |
Copper |
| Ni |
% |
Nickel |
| Al |
% |
Aluminium |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
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 |
| $$\sigma_{0.2}$$ |
$$MPa$$ |
Tensile stress required to produce a total elongation of 0.2% |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
Description of magnetic properties
| Parameter |
Units of measurement |
Description |
| $$\mu_{max}$$ |
$$MH/m$$ |
Magnetic permeability (not more) |
| $$P_{1.5/50}$$ |
$$W/kg$$ |
Specific magnetic losses (no more) while the magnetic induction is 1.5 T and frequency is 50 Hz |
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 |
|
|
Description of temperatures of critical points
| Parameter |
Units of measurement |
Description |
| Ac3(Acm) |
K |
|