Alloy 48NKH (ЭИ693)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
48НХ |
| Designation GOST Latin |
48HX |
| Transliteration |
48NH |
| The chemical elements |
48NiCr |
| Name |
The value |
| Designation GOST Cyrillic |
ЭИ693 |
| Designation GOST Latin |
EI693 |
| Transliteration |
EhI693 |
| The chemical elements |
- |
Description
Alloy 48NKH used: for the manufacture of vacuum-tight junctions with thermometric glass brands 16Ш, С72−4, etc.
Note
Alloy with an average value of CTE.
Alloy with a CTE (8,5−9,5)·10-6 deg-1 in the temperature range from -70 to + 450 °C.
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and general norms |
В30 |
GOST 10994-74 |
| Tapes |
В34 |
GOST 14080-78 |
| Steel alloy wire |
В73 |
GOST 14081-78 |
| Sectional and shaped rolling |
В32 |
GOST 14082-78, TU 14-11-245-88 |
| Pipes steel and connecting parts to them |
В62 |
GOST 14162-79, TU 14-159-165-87 |
| Bulls. Blanks. Slabs |
В31 |
TU 14-1-3904-84, TU 14-1-613-73 |
| Pipes from ferrous metals and alloys cast and connecting parts to them |
В61 |
TU 14-3-225-74 |
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 |
0.7-1 |
≤0.3 |
48-49.5 |
The rest |
≤0.2 |
Fe is the basis.
Mechanical characteristics
| Section, mm |
σB, MPa |
d5, % |
| Tubes of small dimensions (capillary) heat-treated or cold-worked in the state of delivery according to GOST 14162-79 |
|
≥392 |
≥40 |
| Cold-rolled steel strip according to GOST 14080-78 on delivery |
| 0.1-2.5 |
≤930 |
- |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
Physical characteristics
| Temperature |
r, кг/м3 |
a, 10-6 1/°С |
| 20 |
8350 |
- |
| 100 |
- |
86 |
| 200 |
- |
86 |
| 300 |
- |
85 |
| 400 |
- |
85 |
| 500 |
- |
92 |
| 600 |
- |
107 |
| 700 |
- |
112 |
| 800 |
- |
119 |
A description of the physical symbols
| Name |
Description |
| Е |
The normal elasticity modulus |
| l |
Coefficient of thermal conductivity |
| R |
UD. the resistivity |
Technological properties
| Name |
The value |
| Inflection Point Temperature |
≥410 °C |
