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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.

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