Alloy 77NMD (ЭП264)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
77НМД |
| Designation GOST Latin |
77HMD |
| Transliteration |
77NMD |
| The chemical elements |
77NiCuД |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП264 |
| Designation GOST Latin |
EP264 |
| Transliteration |
EhP264 |
| The chemical elements |
- |
Description
Alloy 77NMD used: for the manufacture of small cores of transformers, chokes and relays, working in weak magnetic fields, screens. Small thickness (0,05- 0,02 mm) — for the cores of pulse transformers, magnetic amplifiers and contactless relays.
Note
Alloy with high magnetic permeability in weak fields at saturation induction of 0.65−0.75 T. the Alloy after heat treatment with slow cooling from 600 °C is characterized by a slight change of properties in the climatic temperature range.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and general norms |
В30 |
GOST 10160-75, GOST 10994-74 |
| Tapes |
В34 |
TU 14-1-1306-75, TU 14-1-1708-76 |
| Sectional and shaped rolling |
В32 |
TU 14-11-245-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Si |
Ni |
Fe |
Cu |
Mo |
| GOST 10994-74 |
≤0.03 |
≤0.01 |
≤0.02 |
≤1.4 |
0.1-0.3 |
75.5-78 |
The rest |
4.8-6 |
3.9-4.5 |
Ni is the basis.
According to TU 14-1-1708-76 the chemical composition for the alloy of grade 77NMD-VI is given.
Physical characteristics
| Temperature |
r, кг/м3 |
| 20 |
8600 |
A description of the physical symbols
| Name |
Description |
| r |
Density |
Technological properties
| Name |
The value |
| Features of production |
Tape on the other 14-1-1708-76 supplied in cold-worked condition without heat treatment. |
