68NM (68NMP)
For the manufacture of cores of magnetic amplifiers, switching chokes, rectifying units, pulse and broadband transformers.
Classification
| Country |
Section |
Category |
| CIS, Russia, Ukraine |
Precision alloys |
Soft Magnetic Precision Alloys |
Chemical composition
| Standard |
Fe, % |
Si, % |
Mn, % |
Ni, % |
P, % |
C, % |
S, % |
Mo, % |
|---|
| GOST 10994-74 |
27.33–31.1 |
< 0.3 |
0.4–0.8 |
67–69 |
< 0.02 |
< 0.03 |
< 0.02 |
1.5–2.5 |
Information on suppliers
Physical characteristics
| Temperature, °C |
$$\rho$$, $$\frac{kg}{m^3}$$ |
$$R\cdot 10^{-6}$$, $$\Omega\cdot m$$ |
|---|
| 20 |
8400 |
0.45 |
Mechanical properties at 20 °C
| Rolling |
Standard |
Size, mm |
Tension |
Classifiers |
$$\sigma _{U}$$, $$MPa$$ |
$$\sigma_{P}$$, $$MPa$$ |
$$\epsilon_L$$, % |
$$\psi$$, % |
Treatment |
|---|
| Tape |
|
|
|
|
540 |
145 |
50 |
|
|
| Tape |
|
|
|
cold-work |
930 |
|
3 |
5 |
|
Brinell hardness number
| Rolling |
Standard |
Classifiers |
Value, HBW |
| Tape |
|
|
120 |
| Tape |
|
cold-work |
230 |
Standards
Description of chemical elements
| Element |
Units of measurement |
Description |
| Fe |
% |
Iron |
| Si |
% |
Silicon |
| Mn |
% |
Manganese |
| Ni |
% |
Nickel |
| P |
% |
Phosphorus |
| C |
% |
Carbon |
| S |
% |
Sulfur |
| Mo |
% |
Molybdenum |
Description of physical characteristics
| Parameter |
Units of measurement |
Description |
| $$\rho$$ |
$$\frac{kg}{m^3}$$ |
The density of the material |
| $$R\cdot 10^{-6}$$ |
$$\Omega\cdot m$$ |
Electrical resistivity |
Description of mechanical properties
| Parameter |
Units of measurement |
Description |
| $$\sigma _{U}$$ |
$$MPa$$ |
Ultimate tensile strength |
| $$\sigma_{P}$$ |
$$MPa$$ |
Proportionality limit |
| $$\epsilon_L$$ |
% |
Elongation at break (longitudinal) |
| $$\psi$$ |
% |
Reduction in cross section on fracture |