Designation
| Name |
The value |
| Designation GOST Cyrillic |
3МИ3У |
| Designation GOST Latin |
3MI3U |
| Transliteration |
3MI3U |
| By chemical elements |
3CuIr3У |
Description
Alloy 3МИ3У used: for the production of cast bar billets (LPZ), intended for subsequent remelting and casting of gas turbine components.
Note
High-temperature Nickel-based alloy.
Standards
| Name |
Code |
Standards |
| Bars |
В55 |
TU 1-809-1025-98 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
N |
Al |
B |
Ti |
Mo |
Pb |
Bi |
W |
O |
Co |
Y |
La |
| TU 1-809-1025-98 |
0.07-0.15 |
≤0.01 |
≤0.01 |
≤0.3 |
12.5-14 |
≤0.4 |
Rest |
≤1.5 |
≤0.01 |
2.8-4 |
0.01-0.015 |
4-5.5 |
0.5-1.25 |
≤0.001 |
≤0.0005 |
6.5-8 |
≤0.003 |
4-6 |
≤0.03 |
≤0.01 |
Ni is the basis.
According to TU 1-809-1025-98 the chemical composition is given for the alloy grade 3MI3U-VI. The total content of Aluminum + Titanium = 7.50-8.50%.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
KCU, kJ/m2 |
| Cast rod stock (LPZ). Alloy 3МИ3У-VI. Heating up to 1160-1180 °C, exposure 4 hours, cooling with the furnace to 1040-1060 °C, exposure 2 h, air cooling or Heating to 840-860 °C, exposure time 16 h, air cooling |
|
≥716 |
≥833 |
≥3 |
≥147 |
|
≥686 |
≥833 |
≥4 |
- |
Description mechanical marks
| Name |
Description |
| sT|s0,2 |
Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2% |
| σU |
Limit short-term strength |
| d5 |
Elongation after rupture |
| KCU |
Toughness |
