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 |
