Alloy 40HNU (ЭП793)
Alloy 40KhNu (EP793)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
40ХНЮ |
| Designation GOST Latin |
40XHJu |
| Transliteration |
40HNYu |
| The chemical elements |
40CrNiAl |
| Name |
The value |
| Designation GOST Cyrillic |
ЭП793 |
| Designation GOST Latin |
EP793 |
| Transliteration |
EhP793 |
| The chemical elements |
- |
Description
Alloy 40HNU used: for the manufacture of parts non-magnetic corrosion resistant bearings and other parts for special purposes.
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В32 |
GOST 22411-77, TU 14-1-2740-79 |
| Sectional and shaped rolling |
В22 |
GOST 2590-2006 |
| Steel alloy wire |
В73 |
TU 14-1-1957-77 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Al |
| TU 14-1-2740-79 |
≤0.03 |
≤0.01 |
≤0.01 |
≤0.1 |
39-41 |
≤0.1 |
The rest |
≤0.6 |
3.3-3.8 |
Ni is the basis.
Mechanical characteristics
| Section, mm |
sT|s0,2, MPa |
σB, MPa |
d5, % |
y, % |
kJ/m2, кДж/м2 |
HRC |
| Bars hot rolled and forged 8-100 mm on THAT 14-1-2740-79. Quenching in water from 1140-1160 °C + Vacation 540-560 °C (maintained for 5 h), air cooling |
| 25 |
- |
- |
- |
- |
- |
≥57 |
| Bars hot rolled and forged 8-100 mm on THAT 14-1-2740-79. Quenching in water from 1140-1160 °C + Vacation 800-840 °C (aging 12-24 hours), air cooling |
| 25 |
≥1080 |
≥1275 |
≥10 |
≥15 |
≥98 |
≤45 |
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 |
| d5 |
Elongation after rupture |
| y |
The relative narrowing |
| kJ/m2 |
Toughness |
| HRC |
Rockwell hardness (indenter diamond spheroconical) |
