Designation
| Name |
The value |
| Designation GOST Cyrillic |
40НКМ |
| Designation GOST Latin |
40HKM |
| Transliteration |
40NKM |
| By chemical elements |
40NiCoCu |
Description
Alloy 40NKM used: for the manufacture of cores of the coil constant inductance, chokes filters, wideband transformers.
Note
The alloy has anisotropic magnetic properties, low residual magnetic induction and constancy of magnetic permeability and saturation induction of at least 1.2−1.5 T
From 01.01.1991 alloy is not allowed to use in the newly created and upgraded technology.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and General rules |
В30 |
GOST 10160-75, GOST 10994-74 |
| Bars and shapes |
В32 |
TU 14-11-245-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Si |
Ni |
Fe |
Mo |
Co |
| GOST 10994-74 |
≤0.03 |
≤0.02 |
≤0.02 |
0.3-0.6 |
≤0.3 |
39.3-40.7 |
Rest |
3.8-4.2 |
24.5-26 |
Fe is the basis.
