Precision Alloy 25X15KYUBF (Alloy EC33)
Foreign analogues not identified
Used for the production of permanent magnets
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Precision alloys |
With given TCLE |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Co, % |
Cr, % |
V, % |
Al, % |
C, % |
Nb, % |
|---|
| GOST 10994-74 |
53.54–59.8 |
0.3–0.8 |
< 0.5 |
14–16 |
23.5–25.5 |
0.8–1.2 |
0.8–1.2 |
< 0.06 |
0.8–1.2 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$\alpha\cdot 10^{6}$$, $$K^{-1}$$ |
$$\varkappa$$, $$\frac{W}{m\cdot K}$$ |
|---|
| 20 |
11.5–12 |
25–32 |
Mechanical properties at 300 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
d5, % |
Treatment |
|---|
| Castings |
GOST 10994-74 |
250 |
Transverse |
|
> 48 |
< 2 |
|
Magnetic properties
| Rolling |
$$H_c$$, $$A/m$$ |
$$B_{1000}$$, $$T$$ |
|---|
| Castings |
450 |
7000–11000 |
Твёрдость по Роквеллу
| Rolling |
Standard |
Classifiers |
Value, HRC |
| Castings |
GOST 10994-74 |
|
> 43 |
Limit operating modes
Heat Treatment Modes
| Treatment |
|---|
| Quenching from 1300-1100 ° С and tempering at 700-800 ° С. |
Long-term strength
| Standard |
Treatment |
Постоянно приложенное напряжение, МПа |
|---|
| GOST 10994-74 |
|
230–270 |
Analogues
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Mn |
% |
Manganese |
| Co |
% |
Cobalt |
| Cr |
% |
Chrome |
| V |
% |
Vanadium |
| Al |
% |
Aluminium |
| C |
% |
Carbon |
| Nb |
% |
Niobium |
Description of physical characteristics
| Parameter |
Units of measurement |
Description |
| $$\alpha\cdot 10^{6}$$ |
$$K^{-1}$$ |
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) |
Description of mechanical properties
| Parameter |
Units of measurement |
Description |
| d5 |
% |
Elongation at break |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
Description of magnetic properties
| Parameter |
Units of measurement |
Description |
| $$H_c$$ |
$$A/m$$ |
Magnetic coercivity (not more) |
| $$B_{1000}$$ |
$$T$$ |
Magnetic induction (not less) in a magnetic field while magnetic field strength is 1000 A/m |