Alloy 20NG
Designation
| Name |
The value |
| Designation GOST Cyrillic |
20НГ |
| Designation GOST Latin |
20HG |
| Transliteration |
20NG |
| The chemical elements |
20NiGe |
Description
Alloy 20NG is usedas the active layer in the manufacture of thermostatic bimetallic, is used for making sensitive to the temperature change of the elements of control and measuring instruments and apparatus.
When using alloy grade 36N and the active layer of the alloy 20NG made thermobimetals brand ТБ148/79 (ТБ1523), which is used for the manufacture of heat-sensitive elements of devices (compensators, relay protection, etc.).
When using alloy grade 46Н and the active layer of the alloy 20NG made thermobimetals brand ТБ95/62 (ТБ1031, ТБ68), which is used for the manufacture of heat-sensitive elements of devices (relays, fuses, etc.).
Note
Thermobimetals ТБ148/79 (ТБ1523) with high coefficient sensitivity (21−25)·10-6 deg-1, with a high specific electrical resistance (0,77−0,82) Ohm·mm2/m.
Thermobimetals brand ТБ95/62 (ТБ1031, ТБ68) with the average response factor (15−18)·10-6 deg-1, with an average specific electrical resistance (0,60−0,66) Ohm·mm2/m.
Standards
| Name |
Code |
Standards |
| Tapes |
В34 |
GOST 10533-86, TU 14-1-2250-77 |
| Classification, nomenclature and general norms |
В30 |
GOST 10994-74 |
| Sectional and shaped rolling |
В32 |
TU 14-11-245-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Si |
Ni |
Fe |
| GOST 10994-74 |
≤0.05 |
≤0.02 |
≤0.02 |
5.5-6.5 |
0.15-0.3 |
19-21 |
The rest |
Fe is the basis.
