Precision alloy 30NGHKR (Alloys PN80X7SR and PHN7SR)
It is used for the manufacture of magnets, cores and pole pieces.
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Precision alloys |
Soft Magnetic Precision Alloys |
Chemical composition
| Standard |
Fe, % |
Si, % |
B, % |
Mn, % |
Ni, % |
ET, % |
|---|
| GOST 10994-74 |
2.8–3.8 |
4.3–4.8 |
> 2.8 |
< 0.4 |
88.11–90.1 |
< 0.09 |
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 |
15.5 |
68.5 |
8000 |
456 |
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{Y}$$, $$MPa$$ |
d5, % |
Treatment |
|---|
| Tape |
TU 14-1-1168-75 |
<2.0 |
Transverse |
|
500 |
150 |
> 2 |
|
Magnetic properties
| Rolling |
$$H_c$$, $$A/m$$ |
|---|
| Tape |
3.75 |
Brinell hardness number
Technological Properties
| Weldability |
Flake Susceptibility |
Propensity to temper brittleness |
|---|
| Difficult to weld |
sensitive |
loathsome |
Properties
| Property |
|---|
| the melt has anisotropy of magnetic properties and a rectangular hysteresis loop |
Analogues
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| ET |
% |
Total other items |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| B |
% |
Bor |
| Mn |
% |
Manganese |
| Ni |
% |
Nickel |
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 |
Description of magnetic properties
| Parameter |
Units of measurement |
Description |
| $$H_c$$ |
$$A/m$$ |
Magnetic coercivity (not more) |
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 |
|
|