Relevance
It is impossible to imagine modern electrical engineering without the use of nickel alloys. Today they are indispensable for the production of computer and television equipment, high-precision devices - this allows to avoid the formation of a galvanic pair with other parts made of nickel. 29NK wire serves as a base for grids of radio tubes and microwave devices, cathodes, high-resistance wires for production of thermocouples and electrodes. Such wire is used in electroerosion machines - for controlled decomposition of materials by electric current. Since grade 29NK is susceptible to corrosion, protective nickel plating is required which is applied to the product in a vacuum. Grade 29NK wire is relevant in the construction of mechanisms operating in a vacuum. Its constant customers are research institutes. It is used in electrochemistry for catalysis, as it is a convenient source of nickel.
Manufacturing
Ni in the 29NK composition is very high purity of 99.5%. The remaining 0.5% comes from impurities of silicon, magnesium, arsenic, carbon, tin, and phosphorus. Nickel can be rolled into the finest foil and threads because of its ductility. 29NK wire comes in two versions: naked, rolled under cold pressure to increase elasticity, and soft wire, which is called annealed. It is made from nickel with silicon or manganese additives. Silicon nickel is used in electronics and manganese nickel wire is used in mercury rectifiers, aircraft candles and internal combustion engines. Alloy grade 29NK is used in many industries. The wire is made according to GOST 2179-75. Its surface must be clean without defects or cracks. Minor roughness or traces of broaching are allowed. Under the order such wire with a diameter of a few microns is produced on high-precision equipment.
Physical properties of the alloy:
| Description |
Designation |
|---|
| - Alloy data temperature [degrees Celsius] |
- 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-grad) |
-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 :
| - 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 more), [ 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 29NK grade products are certified. The technical documentation includes data on the chemical composition, the limiting percentage of impurities, and 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 efficiency of service.
Buy at a bargain price
All precision alloys sold by Evek GmbH comply with state quality standards. We supply rolled metal products of standard and non-standard sizes in the shortest terms. High quality, reasonable prices and a wide range of products determine the face of our company. Becoming our regular customer, you can count on a system of discount discounts. Cooperation with us will help you realize any engineering plans. We are waiting for your orders on our site.
