Alloy pipe 29NK
|Mark||Analogue||W. Nr.||Aisi Uns||En||Order|
|29НК||1.3981||K94610||NiCo29-18||Delivery from the stock, in stock|
|29НК-т||~1.3981||~K94610||~NiCo29-18||Delivery from the stock, in stock|
|29НК-м||~~1.3981||~~K94610||~~NiCo29-18||Delivery from the stock, in stock|
By precision alloys include materials with specific mechanical properties. They have specific physical and chemical characteristics, they differ extreme precision of its composition and the absence of impurities, care of production and processing. Most of them are based on iron, chromium, nickel, cobalt, copper and alloys which gives the very special qualities that distinguish them from the other row.
Kovar is a magnetic alloy of iron (54%), nickel (29%), and cobalt. 17% Co in the composition significantly increases the cost of the alloy. Kovar has the same linear expansion coefficient and glass ceramics. Soldered in glass, it forms a sturdy sealed connection used in the electric and measurement techniques, sensors of various designs. This alloy has a resistivity of about 2 times lower than that of Invar. From Kovar made capacitors TKE small and variable capacitance. The drawback is considered to corrosion tendency in a moist environment, that requires no additional protective coating. Be- tween a Kovar plate capacitors cover the metal with good conductivity — often, silver. Precision Alloys Group stands out for its exclusive physical and chemical properties (magnetic, thermal, elastic, electric), thanks to the accuracy of the composition, manufacture and thoroughness of treatment, lack of unnecessary impurities.
Kovar is melted in arc furnaces electroslag method. Alloying components are introduced into the composition in the form of ferroalloys. In the production process is controlled by the chemical composition of the strictest way, so Kovar refers to the precision alloys. Ni in the alloy composition of 99.5% purity material gives high ductility. Due to the plasticity, Kovar can be rolled into the thinnest foil and thread. Wire is delivered in two versions: the work-hardened, cold rolled under pressure to improve elasticity and soft, which is called annealed.
The percentage of
The weight per square meter of Kovar products — in the range of 0.5−18 kilograms. The coating must be clean and smooth. On the surface tolerance of minor injuries: scratches, dents from transportation, color fluctuations. Color changes are also prescribed standard and depend on whether the product is stored in what conditions. Also, the tape may be called a strip if it means segment.
Physical properties of the alloy:
|— Temperature data acquisition of the alloy [Castle]||— T|
|— Modulus of elasticity of the 1st kind, [MPa]||— E|
|— Coefficient of linear thermal expansion (at 20 ° C) [1 / deg]||-a|
|— The electrical resistance [ohm · m]||-R|
|— Specific weight [g / cm3]||-r|
|— Thermal conductivity [W / (m · deg)]||-l|
|— Specific heat capacity (at 20 ° C) [J / (kg · deg)]||-C|
|— The limit of proportionality (the yield strength for the residual strain) [MPa]||sT|
|— Short-term strength [MPa]||sre|
|— Reduction [%]||y|
|— Elongation at break [%]||d5|
|— Brinell hardness in [MPa]||HB|
|— Impact strength [kJ / m2]||KCU|
|— The coercive force (within) [A / m]||Hc|
|— Permeability (max) [mH / m]||Umax|
|— Specific losses (maximum) at 50 Hz and 1.0 T. The magnetic flux density [W / kg]||P1.0 / 50|
|— T. Magnetic induction (at least) at a voltage of the magnetic field 100 in a magnetic field [A / m]||B100|
|— The coercive force (not more), [A / m]||Hc|
|— Permeability (max) [mH / m]||Umax|
|— Specific losses (max) at a frequency of 50 Hz and a magnetic induction of 1.0 T [W / kg]||P1.0 / 50|
|limited weldability||— Needs to preheating t ° 100−120 ° C with a final heat treatment|
|no limits||— No need for preliminary heating and final heat treatment|
|difficult to weld||— Needs to preheating t ° 200−300 ° C with a final heat treatment|
Various elements of electronic devices. Kovar different minimum thermal expansion (in the range 20−400 ° C) and high thermal conductivity 19 W / m ° C, forms a tight connection, making it ideal for the production of electronic devices. Kovar demand in power engineering, nuclear industry. If necessary, the welding wire runs 04H20N10G2B automatic arc welding.
All products are certified 29NK brand. The technical documentation includes data on the chemical composition, limiting the percentage of impurities; mechanical properties of products. We can buy in bulk a variety of semi-finished products for large-scale productions. We also offer good conditions for retail customers. You will be satisfied with the level of service and speed of service.
Buy at a bargain price
The company «Electrovek-steel» provides for the implementation of an unlimited range of precision alloys of the highest quality at a competitive price. If you are not sure, offers experienced managers who are always connected and ready to provide advice. Having made an order with us, you will receive certified products that comply with Russian and international standards of quality in the shortest possible time. If you value your time, contact today with our nearest office in Russia or in Ukraine, or order it over the Internet.