Alloy ХН58КВТЮМБЛ (ЧС70; СН25)
Designation
| Name |
The value |
| Designation GOST Cyrillic |
ХН58КВТЮМБЛ |
| Designation GOST Latin |
XH58KBTJuMBL |
| Transliteration |
HN58KVTYuMBL |
| The chemical elements |
CrNi58CoВTeAlCuBe |
| Name |
The value |
| Designation GOST Cyrillic |
ЧС70 |
| Designation GOST Latin |
ChC70 |
| Transliteration |
ChS70 |
| The chemical elements |
ЧPb70 |
| Name |
The value |
| Designation GOST Cyrillic |
СН25 |
| Designation GOST Latin |
CH25 |
| Transliteration |
SN25 |
| The chemical elements |
PbNi25 |
Description
Alloy ХН58КВТЮМБЛ used: for manufacturing by investment casting and vacuum parts with enhanced long durability and heat resistant up to +900 °C, oxidation resistance at elevated temperatures (turbine blades, ground-based CCD).
Note
Casting heat-resistant Nickel-based alloy.
Standards
| Name |
Code |
Standards |
| Sectional and shaped rolling |
В32 |
TU 14-1-3658-83 |
Chemical composition
| Standard |
C |
S |
P |
Mn |
Cr |
Si |
Ni |
Fe |
Cu |
N |
As |
Al |
B |
Ti |
Mo |
Sb |
Pb |
Bi |
Nb |
W |
Zr |
Co |
Y |
| TU 14-1-3658-83 |
0.06-0.12 |
≤0.008 |
≤0.008 |
≤0.3 |
15-16.7 |
≤0.3 |
The rest |
≤0.5 |
≤0.07 |
≤0.01 |
≤0.0005 |
2.4-3.2 |
≤0.2 |
4.2-5 |
1.5-2.5 |
≤0.0005 |
≤0.001 |
≤5.0E-5 |
0.1-0.3 |
4.5-6 |
≤0.05 |
10-11.5 |
≤0.05 |
Ni is the basis.
Technological properties
| Name |
The value |
| Microstructure |
Strengthening phase of the alloy (γ phase) is practically composed of Ni (Al, Ti), as the alloy contains aluminum and titanium in a ratio close to 1: 1. The phase content of Ni (Nb), giving the alloy a higher stability and resistance to softening at high temperatures (over 900 °C), minimum. |
| Corrosion resistance |
The alloy has high resistance to sulfide corrosion. At temperatures above 900 °C, for gas turbine units operating on natural gas in the conditions of aggressive sulfide environment and the contact pressure, there is a significant wear of band flanges of GTE blades due to fretting corrosion. |
