Characteristics
Precision alloy 42NKhTU belongs to the alloys with specified elasticity characteristics which are used in the production of fine wires and tapes for elastic sensitive elements of gyroscopes, form hangers, rotors, density meters, designed for operation at t° up to 100°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 |
|---|
| 0.5 - 0.8 |
to 0.05 |
44.91 - 49.3 |
0.5 - 0.8 |
up to 0.02 |
to 0.02 |
41.5 - 43.5 |
0.5 - 1 |
2.4 - 3 |
5.3 - 5.9 |
Physical characteristics of 42NKhTu alloy.
| 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 |
|
9.5 |
1.82 |
|
|
|
Mechanical properties of 42NKhTU alloy at 20 °C.
| Range |
For example |
Size |
s in |
KCU |
d5 |
sT |
y |
Thermal treatment. |
|---|
|
- |
mm |
MPa |
kJ/m2 |
% |
MPa |
% |
- |
| Bar according to GOST 14 119-85 |
|
|
980 |
|
8 |
635 |
25 |
Aging and hardening |
| GOST 10 994-74 |
|
|
1180-1570 |
|
|
|
|
|
| Semi-naked wire, GOST 14 118-85 |
|
|
980 |
|
|
|
|
|
| Tape taut, GOST 14 117-85 |
|
|
830 |
|
|
|
|
|
| Tinned wire, GOST 14 118-85 |
|
|
1080 |
|
|
|
|
|
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 (not more than) 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 final heat treatment necessary |
Delivery
All 42NKhTU 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
Evek GmbH has an unlimited range of precision alloys of the highest quality. We offer special alloys at the best price. If you are interested in our offer, please contact your nearest office. Qualified specialists will provide all necessary information regarding products, price range, sales conditions. The cost of goods depends on the parameters of products and additional terms of delivery.
