Relevance
Heat-resistant alloy KhN55VMTKYu (EI929, EI929-VD, KhN55VMTKYu-VD) is used in the manufacture of turbine blades, gas turbine engine parts. It is designed for a limited service life at temperatures up to 950 °C. The beginning of intensive scale formation occurs at 1050 °C. Hardness of the alloy KhN55VMTKYu at the end of hardening and aging: HB 10-1 = 285 - 341 MPa. The rod is produced according to GOST 23 705-79.
The main requirements to the material for the turbine blades are caused by the latest developments of the engine design, increased ductility, heat resistance, resistance to low-cycle and thermal fatigue as well as resistance to the effects of gas media. In modern engines, the material for turbine parts must have high resistance to low-cycle and thermal fatigue failure, which is the main cause of failure today. The danger of fracture can be exacerbated by surface reactions that are associated with grain boundary loosening, gas corrosion.
Percent xposition (GOST 5632-72)
| Mn |
Si |
C |
S |
Mo |
Cr |
P |
W |
Ti |
Co |
V |
B |
Al |
|---|
| up to 0.5 |
up to 0.5 |
0.04 - 0.1 |
up to 0.01 |
4 - 6 |
9 - 12 |
up to 0.015 |
4.5 - 6.5 |
1.4 - 2 |
12 - 16 |
0.2 - 0.8 |
up to 0.02 |
3.6 - 4.5 |
Physical characteristics of the alloy KhN55VMTKYu grade
| Grad |
1/Grad |
MPa |
kg/m3 |
W/(m-grad) |
Ohm-m |
J/(kg-grad) |
|---|
| T |
a 10 6 |
E 10- 5 |
r |
l |
R 10 9 |
C |
| 900 |
15.5 |
|
|
|
|
|
| 800 |
14.5 |
|
|
|
|
|
| 700 |
14.1 |
|
|
|
|
|
| 600 |
13.8 |
|
|
|
|
|
| 500 |
13.4 |
|
|
|
|
|
| 400 |
12.8 |
|
|
|
|
|
| 300 |
12.4 |
|
|
|
|
|
| 200 |
11.7 |
|
|
|
|
|
| 100 |
10.8 |
|
|
|
|
|
| 20 |
|
|
|
|
|
|
Physical properties of the alloy:
| Description |
Designation |
|---|
| - Alloy data acquisition temperature [Grad] |
- T |
| - Modulus of elasticity of the 1st kind, [MPa] |
- E |
| - Coefficient of thermal linear expansion (at 20°C), [1/Grad] |
-a |
| - Specific electrical resistance [Ohm-m] -R |
-R |
| - Specific gravity [g/cm3] -r |
-r |
| - Heat transfer coefficient [W/(m-grad)] -l |
-l |
| - Specific heat capacity (at 20°C), [J/(kg-cold)] -C |
-C |
| Mechanical properties: |
| - Limit of proportionality (yield strength for permanent deformation) [MPa] |
sT |
| - Creep rupture strength [MPa] |
sT |
| - Ratio constriction [ % ] |
y |
| - Tensile elongation [ % ] |
d5 |
| - Brinell hardness, in [MPa] |
HB |
| - Impact toughness [ kJ/m2 ] |
KCU |
Magnetic properties :
| Description |
Designation |
|---|
| - Coercive force (within) [ A/m] |
Hc |
| - Magnetic permeability (not more than) [ MHN/m] |
Umax |
| - Losses (not more than) at frequency 50 Hz and 1.0 Tl [ W/kg ] |
P1.0/50 |
| - Magnetic induction Tl (not less) at magnetic field strength 100, in magnetic fields [ A/m] |
B100 |
| - Coercive force (not less), [ A/m] |
Hc |
| - Magnetic permeability (not more than), [ MHN/m] |
Umax |
| - Losses per unit (max) at frequency 50 Hz and 1.0 Tl [ W/kg ] |
P1.0/50 |
weldability:
| Designation |
Description |
|---|
| Limited weldable |
- Must be preheated to 100-120°C with subsequent heat treatment |
| no restrictions |
- No need for preheating and final heat treatment |
| Difficult to weld |
- need preheating to 200-300 ° C with the final heat treatment |
Buy at the best price
The range of products of KhN55VMTKY from Evek GmbH satisfies any consumer. The price is determined by the technological features of production without the inclusion of additional costs. All products are certified. With us it is easy to buy the necessary products in bulk for large-scale projects, we also offer favorable conditions for retail customers. Technological configuration of each production stage gives us the opportunity to fulfill individual orders of non-standard parameters. Products are manufactured by strictly following the technological process, which guarantees the highest quality, stored under cover or indoors to protect against mechanical damage, contact with moisture and aggressive substances. The terms of realization of orders are minimal. Wholesale customers receive discounts.
