Alloy 32NKD (ЭИ630А)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
32НКД |
| Designation GOST Latin |
32HKD |
| Transliteration |
32NKD |
| The chemical elements |
32NiCoД |
| Name |
The value |
| Designation GOST Cyrillic |
ЭИ630А |
| Designation GOST Latin |
EI630A |
| Transliteration |
EhI630A |
| The chemical elements |
- |
Description
Alloy 32NKD used: for the manufacture of parts of instruments of very high precision, requiring constant size in the range of climatic temperatures.
Note
The alloy with the lowest CTE.
Alloy in the tempered condition, with a minimum CTE of 1.0·10-6 deg-1 in the temperature range from minus 60 to plus 100 °C.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and general norms |
В30 |
GOST 10994-74 |
| Tapes |
В34 |
GOST 14080-78 |
| Sectional and shaped rolling |
В32 |
GOST 14082-78, TU 14-1-3264-81, TU 14-11-245-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Si |
Ni |
Fe |
Cu |
Co |
| GOST 10994-74 |
0.05 |
≤0.015 |
≤0.015 |
≤0.4 |
≤0.2 |
31.5-33 |
The rest |
0.6-0.8 |
3.2-4.2 |
Fe is the basis.
Physical characteristics
| Temperature |
r, кг/м3 |
a, 10-6 1/°С |
| 20 |
8200 |
- |
| -60 |
- |
2 |
| 100 |
- |
7 |
| 300 |
- |
54 |
A description of the physical symbols
| Name |
Description |
| r |
Density |
| a |
The coefficient of linear expansion |
