Designation
| Name |
The value |
| Designation GOST Cyrillic |
47Н3Х |
| Designation GOST Latin |
47H3X |
| Transliteration |
47N3H |
| By chemical elements |
47Ni3Cr |
Description
Alloy 47N3KH used: for vacuum-tight joints with thin films of soft glass of the type «Lenses».
Note
Alloy with an average value of CTE.
Alloy with a CTE (9,5−10,5)·10-6 deg-1 in the temperature range from -70 to + 400 °C.
Alloy brand 47НЗХ not allowed to use in the newly created and upgraded technology with 01.01.91.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and General rules |
В30 |
GOST 10994-74 |
| Tape |
В34 |
GOST 14080-78 |
| Blanks. Of the workpiece. Slabs |
В31 |
TU 14-1-3904-84 |
| Bars and shapes |
В32 |
TU 14-11-245-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
| GOST 10994-74 |
≤0.05 |
≤0.015 |
≤0.015 |
0.3-0.6 |
3-4 |
≤0.3 |
46-48 |
Rest |
≤0.2 |
Fe is the basis.
Physical characteristics
| Temperature |
r, kg/m3 |
a, 10-6 1/°C |
| 20 |
8200 |
- |
| -100 |
- |
88 |
| -80 |
- |
88 |
| -60 |
- |
87 |
| -40 |
- |
87 |
| -20 |
- |
85 |
| 100 |
- |
81 |
| 200 |
- |
82 |
| 300 |
- |
80 |
| 400 |
- |
83 |
| 500 |
- |
96 |
| 600 |
- |
118 |
| 700 |
- |
123 |
| 800 |
- |
131 |
A description of the physical symbols
| Name |
Description |
| r |
Density |
| a |
The coefficient of linear expansion |
Technological properties
| Name |
The value |
| The temperature of the inflection point |
≥390 °C |
