49K2 °F wire is used for a junction with soft glass. It is made of precision alloy with a defined linear expansion thermal coefficient x1000000 at temperature range -70 +330ºC and not higher than 8,5−11 [1/ºC]. This precision alloy possesses rare physical, mechanical characteristics (magnetic, elastic, heating, electrical etc.) It is characterized with an accuracy of chemical composition, a preciseness of manufacture, processing, and absence of residual elements. It is high-doped alloy. Precision alloys are manufactured on a basis of iron, nickel, copper, mangan and cobalt. This group of alloys is used in modern innovative technologies, at manufacturing the electronic units, household appliances, details of laser techniques and metrologic-measuring equipment.
Percentage composition of alloy:
||S and P
||48 — 50
||1.3 — 1.8
||47 — 50.5|
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Mechanical properties at a temperature 20 °C.
This alloy is utilized in cores, pole-pieces, magnets and solenoidal coils, in electric machine industry, transformer and radio engineering, electrotechnical sphere of industry and in automation systems, teleautomatics, computationally measuring equipment.
|Modulus of elasticity of first kind [MPa]
|Heating capacity of material (or coefficient of conductivity for heat) [V/(m/degree]
|Required temperature for obtaining of actual features, [Degree]
|Linear expansion thermal coefficient [1/degree] (range of temperatures 20°С)
|Electrical unit-area resistance [Ohm-m]
|Density of a material, [kg/m3]
|Specific heat of a material [J/(kg/degree)] (range of temperature 20°С)
|Coercive field (not higher) [A/m]
|Magnetic inductive capacity (not higher) [mH/m]
|Specific loss (not higher) 50 hz of frequency, magnetic induction 1.0 Т[ B/kg ]
|Magnetic T induction, magnetic field strength no less than 100, in magnetic field, [A/m]
|Short resistance to rupture [MPa]
|Flow limit (proportional limit load) for permanent change of form [MPa]
|Percent elongation at fracture [ % ]
|Contraction ratio [ % ]
|Impact hardness [ kJ/m2]
|Brinell hardness [MPa]
||welding is possible at heating to 100−120°С and last heat treating|
||in order to obtain a qualitative welded joints, it is necessary to perform the following operations: while welding to heat it up to 200−300°C, heat treating (annealing) after welding|
|weldable without stint
||welding is done without further heat treating or previous heating|
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