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Tape, round, wire 80НМ

Tape, round, wire 80НМ

general characteristics

The alloy 80NM according to GOST-19693−74 is magnetically soft, has no more than 4 kA / m coercive force by induction. The precision mark of 80MM has a low coercive force with the induction of saturation of 0.65−0.75 T in weak fields and a very high magnetic permeability. At the end of heat treatment with gradual cooling starting from + 600 ° C, there is a slight change in the characteristics in the climatic temperature range. Magnetically soft materials have a high value of magnetic initial permeability, they can be magnetized to saturation and in weak fields. In addition to iron, they include cobalt, nickel, and molybdenum. The class of magnetically soft materials also includes especially pure ferromagnetic iron, low-carbon electrotechnical steels (undoped, siliceous), precision low-coercivity alloys with iron-nickel, iron base, ferrimagnetic and ferromagnetic powder, composite. Such alloys are melted in metallurgical special furnaces to obtain the required shapes, followed by forging or rolling ingots. Magnetic soft alloys are widely used in the production of transformer cores, in microphones, memory components for computers, magnetic circuits that are designed for operation in seawater, parts for electric machines, magnetic antennas.


The 80NM alloy is used, as a rule, in electrical machine building, in the production of magnetic field magnetic flux cores, in transformer engineering, in the radio engineering, electrical engineering industries, in automation systems, telemechanics, and computer measuring equipment.

Bounded welding — welding is possible during heating up to the tempo. 100−120 oC and thermal further processing
Compostable — In order to obtain welded quality joints, it is necessary to perform additional operations: during welding, heating to temper. 200−300 ° C, heat treatment (annealing) after welding.
Welded without restrictions — welding is carried out without thermal further processing and preheating.

Chemical composition of 80NM in percent

Mn Cr C Si S Co Ni P
0.2 — 0.4 0.3 — 0.6 Up to 0.04 Up to 0.25 Up to 0.015 26.5 — 28 Up to 0.3 Up to 0.015

The physical characteristics of the brand are 80NM.

L R C T R 10 9 E 10−5 A 10 6
      100     10.7
W / (m · deg) Kg / m3 J / (kg · deg) Grad Ohm · m MPa 1 / Grad
  7980   20 200 2.2  


The physical characteristics of this grade of alloy:
— the first kind of modulus of elasticity, [MPa] — E
— Heat capacity of the material (or coefficient of heat conductivity), in [W / (m · deg)] -l
— The temperature required to obtain these properties, [Grad] — T
— linear coefficient. Temper. Expansion in [1 / Grad] (temp. Interval 20 ° C), -a
— electrical resistivity, in [Ohm · m] -R
— The density of this material, [kg / m3] -r
— Specific heat of specific material in [J / (kg · deg)] (temp. Interval 20 ° C) -C

Magnetic characteristics:

— force coercive (not higher), in [A / m] Hc
— permeability is magnetic (not higher), in [MH / m] Umax
— loss of specific (not higher) frequency 50 Hz, magnetic induction 1.0 T, in [W / kg] P1.0 / 50
— Magnetic Tl induction, the magnetic field strength is not less than 100, in a magnetic field, in [A / m] B100

Mechanical characteristics of 80NM at temperatures of 20oC.

Assortment D5 For example. Heat treatment. ST The size Sv Y KCU Y
Hardened. Tape, according to GOST 10160−75 2         1080      
Tape, according to GOST 10160−75 20     295   590      
- % - - MPa Mm MPa % KJ / m2 %
Mechanical characteristics:
— Strength of short-term, in [MPa] Sv
— Yield limit (proportionality limit) for deformation of residual, in [MPa] ST
— at break, the relative elongation, in [%] D5
— the restriction is relative, in [%] Y
— Impact viscosity, in [kJ / m2] KCU
— Brinell hardness, in [MPa] HB


The 80NM alloy is actual in the production of cores of small-sized transformers, relays and chokes, which work in weak fields of magnetic screens; In the manufacture of non-contact relays of small thicknesses (0.05−0.02 mm) of magnetic amplifiers and cores of pulse transformers.

Buy at a bargain price

LLC «Avek Global» sells precision alloys at a bargain price. It is formed under the influence of world prices for rolled metal products without including additional costs. The 80NM alloy belongs to the popular group of metal products, due to its real cost and variety of produced options. The face of our company determines the high level of service and excellent product quality. The website of Avek Global LLC reflects the most timely information. Our managers are always happy to help with the solution of the issues that have arisen. The implementation of orders takes minimal time. Discounts for wholesale buyers are provided. Deliveries go directly from the warehouse. This gives consumers a clear choice of products and significant savings in warehouse stocks and premises. In the absence of the required type of product in the basic version, as well as in case of need of another product variant, we can produce their non-standard sizes by individual order.