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49KF, 49K2F rod, bar

Equivalent

Grade analogue W. Nr. Aisi Uns En Order
49КФ Buy from stock, view availability
49К2Ф EP207 Buy from stock, view availability

Precision alloy 49KF relates to soft-magnetic alloys. It has a high magnetostriction, an excellent magnetic saturation not less than 2.35 T, and a high Curie-point 950 °C. Soft-magnetic materials possess a great index of primary magnetical inductive capacity; they can magnetize themselves in weak fields up to saturation. The alloys, in which composition there are cobalt and vanadium (except for iron) relate to this group.

Percentage composition of alloy

C Si Mn Ni S и P Co V Fe
≤0.05 ≤ 0.3 ≤ 0.3 ≤ 0.3 to 0.02 48 — 50 1.3 — 1.8 47 — 50.5

Welding

Type Description
limited welded welding is possible at heating to 100−120°С and last heat treating
hardly welded 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
welded without stint welding is done without further heat treating or previous heating

Physical properties

Ohm-m J/(kg/degree) V/(m/degree) Degree kg/m3 MPa 1/Degree
R 10 9 C l T r E 10- 5 a 10 6
400 20   20 8150 2.2  
100 9.2   100      

Physical characteristics

Description Identification
Modulus of elasticity of first kind [MPa] E
Heating capacity of material (or coefficient of conductivity for heat) [V/(m/degree] l
Required temperature for obtaining of actual features, [Degree] T
Linear expansion thermal coefficient [1/degree] (range of temperatures 20°С) a
Electrical unit-area resistance [Ohm-m] R
Density of a material, [kg/m3] r
Specific heat of a material [J/(kg/degree)] (range of temperature 20°С) C

Magnetic characteristics

Description Identification
Coercive field (not higher) [A/m] Hc
Magnetic inductive capacity (not higher) [mH/m] Umax
Specific loss (not higher) 50 hz of frequency, magnetic induction 1.0 Т[ B/kg ] P1.0/50
Magnetic T induction, magnetic field strength no less than 100, in magnetic field, [A/m] B100

Mechanical characteristics of alloy at a temperature 20 °C.

Dimension sv Heat treatment. F.e. KCU Thickness y sT  
  MPa     kJ/m2 mm % MPa  
Strip, GOST 14 10160−75 490       2.5   345  
A hammer-hardened strip according to GOST 10 160−75. 1320       2.5      

Mechanical properties

Description Identification
Short resistance to rupture [MPa] sv
Flow limit (proportional limit load) for permanent change of form [MPa] sT
Percent elongation at fracture [ % ] d5
Contraction ratio [ % ] y
Impact hardness [ kJ/m2] KCU
Brinell hardness [MPa] HB

Appliaction

Soft-magnetic alloys of a grade 49KF are used in cores, pole pieces, magnets and solenoids. It is utilized in electric machine industry, transformers and radio engineering, an electrotechnical sphere of industry and in automation systems, teleautomatics, computationally measuring equipment. An extra pure ferromagnet iron, low-carbon electrothecnical steels (siliceous, unalloyed), low-coercive precision alloys on an iron-nickel or iron basis relate to this category of soft-magnetic alloys. They can also be ferromagnet, ferrimagnet, powdered, compositional. Precision alloys are used in spheres of accurate instrument engineering. It is also popular at manufacturing electronic units, household appliances, details of laser techniques and metrologic and measuring equipment. Soft-magnetic alloys are melted in special furnaces for obtaining required shapes. After that, they can be exposed to rolling or forging. Soft-magnetic alloys are extensively used in modern industry. They are used for manufacturing transformers, microphone cores, components of computer storage, magnetic antennas, details of electric machines and magnet cores that are intended to work in sea water.

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