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Alloy 42NKHTJU (42NKHTJUA)

Designation

Name The value
Designation GOST Cyrillic 42НХТЮ
Designation GOST Latin 42HXTJu
Transliteration 42NHTYu
The chemical elements 42NiCrTeAl
Name The value
Designation GOST Cyrillic 42НХТЮА
Designation GOST Latin 42HXTJuA
Transliteration 42NHTYuA
The chemical elements 42NiCrTeAl

Description

Alloy 42NKHTJU used: for the manufacture of elastic and provocatively elements operating at temperatures up to +100 °C.

Note

Alloy dispersion-hardening with low temperature coefficient of modulus of elasticity up to +100 °C (20·10-6 1/°C) with a temporary resistance 1180−1570 MN/m2 (120−160 kgf/mm2).

Standards

Name Code Standards
Classification, nomenclature and general norms В30 GOST 10994-74
Tapes В34 GOST 14117-85, TU 14-4-664-75
Steel alloy wire В73 GOST 14118-85
Sectional and shaped rolling В32 GOST 14119-85, TU 14-11-245-88
Sheets and stripes В33 TU 14-1-3270-81
Pipes steel and connecting parts to them В62 TU 14-3-379-75

Chemical composition

Standard C S P Mn Cr Si Ni Fe Al Ti
GOST 10994-74 ≤0.05 ≤0.02 ≤0.02 0.5-0.8 5.3-5.9 0.5-0.8 41.5-43.5 The rest 0.5-1 2.4-3
Fe is the basis.

Mechanical characteristics

Section, mm t отпуска, °C sT|s0,2, MPa σB, MPa d d10 y, % HRC
Cold-rolled steel strip as supplied by GOST 14117-85
0.1-2 - - ≥830 - - - -
Cold-rolled steel strip as supplied by GOST 14117-85. Quenching in water from 900-920 °C + Aging at 680-700 °C (extract 3 hours)
0.1-0.9 - - ≥980 ≥5 - - -
1-2 - ≥735 ≥1080 ≥8 - - ≥30
Cold-rolled steel strip as supplied by GOST 14117-85. Aging (in the graph, the temperature of leave is specified aging temperature and aging time)
- 680-700, 3ч - - - - - -
- 600-650, 1-2ч 1130-1320 1270-1420 ≥3 - - -
Cold drawn wire in the delivery state according to GOST 14118-85. Aging at 600-700 °C (exposure 1-2 h), air cooling
0.3-5 - - ≥1270 - - - -
0.3-5 - - - - - -
Bars and rods, hot-rolled, forged and with special surface finish GOST 14119-85. Quenching in water from 900-920 °C + Aging at 680-700 °C (extract 3-4 hours), air cooling
1-120 - ≥635 ≥980 - ≥8 ≥25 -

Description mechanical marks

Name Description
Section Section
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σB Limit short-term strength
d Elongation after rupture
d10 Elongation after rupture
y The relative narrowing
HRC Rockwell hardness (indenter diamond spheroconical)

Physical characteristics

Temperature r, кг/м3
20 7900

A description of the physical symbols

Name Description
Е The normal elasticity modulus
G Modulus of elasticity shear torsion
r Density
l Coefficient of thermal conductivity
С Specific heat

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