Characteristics
44NKhTU precision alloy belongs to the alloys with specified elasticity characteristics which are used in the manufacture of fine wires and tapes for elastic sensitive elements of gyroscopes, form suspensions, rotors, density meters, designed for the work at t° up to 200°C. The hardness of 44NKhTU grade is HB = 30-32 MPa. It is a highly alloyed iron-nickel alloy with additions of titanium, chromium and other elements. The unique physical and technical qualities (thermal, elastic, magnetic, electrical) are achieved by optimal ratio of elements, absence of harmful impurities, verified processing technology. The production is regulated by TU 14-1-3074-80.
Percentage composition
| Si |
C |
Fe |
Mn |
P |
S |
Ni |
Al |
Ti |
Cr |
|---|
| 0.3 - 0.6 |
to 0.05 |
44.11 - 48.3 |
0.3 - 0.6 |
up to 0.02 |
to 0.02 |
43.5 - 45.5 |
0.4 - 0.8 |
2.2 - 2.7 |
5 - 5.6 |
Physical characteristics of 44NKhTu alloy grade.
| Grad |
W/(m-grad) |
1/Grad |
MPa |
Oh-m-m |
J/(kg-grad) |
kg/m3 |
|---|
| T |
l |
a 10 6 |
E 10- 5 |
R 10 9 |
C |
r |
| 20 |
8 |
1.79 |
|
|
|
|
Mechanical properties of 44NKhTU alloy at 20 °C.
| Range |
For example |
Size |
s in |
KCU |
d5 |
sT |
y |
Heat treatment. |
|---|
| - |
mm |
MPa |
kJ/m2 |
% |
MPa |
% |
|
|
| Bar according to GOST 14 119-85 |
980 |
635 |
15 |
635 |
25 |
Aging and hardening |
|
|
| Tungsten carbide wire GOST 14 118-85 |
1180 |
|
|
|
|
|
|
|
| Semi-naked wire, GOST 14 118-85 |
980 |
|
|
|
|
|
|
|
| Tape bulk, GOST 14 117-85 |
800 |
|
|
|
|
|
|
|
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:
| Description |
Designation |
|---|
| - Ultimate yield strength (yield strength for permanent deformation) [MPa] |
sT |
| - Tensile 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 |
- Preheating to 200-300°C with subsequent heat treatment is required |
Delivery
All 44NKhTU grade products are certified. The technical documentation includes data on the chemical composition, the limiting percentage of impurities, the mechanical properties of products. From us you can buy in bulk a variety of semi-finished products for large-scale production. We also offer good conditions for retail buyers. You will be satisfied with the level of service and responsiveness of service.
Buy at the best price
The Evek GmbH website provides the most up-to-date information on the purchase of precision alloys to date. Experienced managers who are always in touch are ready to provide highly qualified advice on any current issues. We sell semi-finished products of rare and non-ferrous alloys at a competitive price. Products are manufactured on the most modern equipment and meet the requirements of international quality standards. Regular customers are offered a system of discount discounts.
