Designation
| Name |
The value |
| Designation GOST Cyrillic |
ЧС70 |
| Designation GOST Latin |
ChC70 |
| Transliteration |
ChS70 |
| By chemical elements |
ЧPb70 |
Description
Alloy ЧС70 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 |
Cu |
N |
As |
Al |
B |
Ti |
Mo |
Sb |
Pb |
Bi |
Nb |
W |
O |
Zr |
Co |
Y |
| TU 1-809-1025-98 |
0.06-0.12 |
≤0.008 |
≤0.008 |
≤0.3 |
15-16.7 |
≤0.3 |
Rest |
≤0.5 |
≤0.07 |
≤0.01 |
≤0.0005 |
2.4-3.2 |
0.015-0.02 |
4.2-5 |
1.5-2.5 |
≤0.0005 |
≤0.001 |
≤5.0E-5 |
0.1-0.3 |
4.5-6 |
≤0.003 |
≤0.05 |
10-11.5 |
≤0.05 |
Ni is the basis.
According to TU 1-809-1025-98, the chemical composition is given for the alloy grade ChS70-VI.
Mechanical properties
| Section, mm |
sT|s0,2, MPa |
σU, MPa |
d5, % |
| Cast rod stock (LPZ). Alloy ЧС70-VI. Heating up to 1160-1180 °C, exposure 3 hours, cooling at a speed of 3-15 °C/min to 1050 °C, then air cooling or Heating to 1040-1060 °C, exposure to 4 hrs, air cooling or Heating to 840-860 °C, exposure time of 16-20 h, air cooling |
|
≥735 |
≥833 |
≥2.5 |
|
≥490 |
≥589 |
≥7 |
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 |
