Alloy 42NKHTJUA (Н41ХТА)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
42НХТЮА |
| Designation GOST Latin |
42HXTJuA |
| Transliteration |
42NHTYuA |
| The chemical elements |
42NiCrTeAl |
| Name |
The value |
| Designation GOST Cyrillic |
Н41ХТА |
| Designation GOST Latin |
H41XTA |
| Transliteration |
N41HTA |
| The chemical elements |
Ni41CrTe |
Description
Alloy 42NKHTJUA used: for the manufacture of hair spirals clockworks.
Note
Alloy precipitation hardening with a minimum temperature coefficient of the modulus of elasticity, providing temperature error hair spirals hours (balance-balance) of less than 0.3 s/°C·day, time, resistance, 1080−1375 MN/m2 (110−140 kgf/mm2).
Standards
| Name |
Code |
Standards |
| Classification, nomenclature and general norms |
В30 |
GOST 10994-74 |
| Steel alloy wire |
В73 |
TU 14-1-2642-79 |
| Sectional and shaped rolling |
В32 |
TU 14-1-799-73, TU 14-11-245-88 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Al |
Ti |
| TU 14-1-799-73 |
≤0.05 |
≤0.02 |
≤0.02 |
0.4-0.8 |
4.9-5.7 |
0.3-0.8 |
41.5-43.5 |
The rest |
0.5-1 |
2.2-3 |
| GOST 10994-74 |
≤0.05 |
≤0.02 |
≤0.02 |
0.3-0.6 |
5-5.6 |
0.4-0.7 |
41.5-43.5 |
The rest |
0.6-1 |
2.3-2.9 |
Fe is the basis.
According to GOST 10994-74, TU 14-1-799-73 the chemical composition is given for the alloy grade 42НХТЮА (Н41ХТА).
Mechanical characteristics
| Section, mm |
σB, MPa |
d5, % |
| Hire. Annealing in air at 910 °C + Aging at 700 °C |
|
1300-1400 |
≥5 |
Description mechanical marks
| Name |
Description |
| Section |
Section |
| σB |
Limit short-term strength |
| d5 |
Elongation after rupture |
Technological properties
| Name |
The value |
| Macrostructure and contamination |
Macrostructure of steel to transverse the etched templeto should not be visible without using the magnifying devices of the traces of shrinkage, bubbles, cracks, and slag inclusions. |
| Features of production |
Rod on the other 14-1-799-73 comes in heat-treated according to the mode of supplying plant. On the rod surface permitted surface defects such as cracks, sunsets, shells, bundles, wooloowin, shells, dents, nicks, scratches, scratchy, if their depth does not exceed half the tolerance on the diameter. |
