Tape, circle, wire 80NM

Relevance

Precision soft magnetic alloy 80NM after heat treatment with slow cooling acquires minimal characteristic deviation at normal climatic temperatures. It is used for cores of compact transformers, chokes operating in weak magnetic fields; contactless relays of small thickness (up to 0.02 mm) magnetic amplifiers and cores of pulse transformers.

Properties

Characterized by maximum magnetic permeability, minimum coercive force, saturation induction of 0,65-0,75 T in weak fields. According to GOST 19 693-74 coercive force ≤ 4 kA/m. Characterized by a high level of magnetic initial permeability, can be magnetized to saturation in weak fields. Such iron-based alloys are alloyed with nickel and cobalt.

Characteristics

Magnetically soft materials are produced from low-carbon steels based on special purity ferromagnetic iron, electrical low-coercive iron-based or iron-nickel-based alloys, powdered and composite ferromagnetics. These alloys are melted in special induction furnaces, after which the ingots are forged or rolled.

Use

Production of cores for transformers, microphones, computer memory components, magnetic cores for marine environments, magnetic antennas, electric motor stators and rotors. Alloy 80HM is most relevant for magnetic cores of magnetic alternating field in the radio, electrical, automation and telemechanics systems, in measuring and computing machinery. This alloy is actively used in the construction of transformers and electric motors,

Chemical composition of 80HM alloy in percent

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


Physical properties of alloy grade 80HM.

T a 10 6 E 10- 5 l C r R 10 9
Grad 1/Grad MPa W/(m-grad) J/(kg-grad) kg/m3 Oh-m-m
100 10.7
20 2.2 7980 200

Mechanical properties of 80HM alloy at 20 °C.

Range For example Size d5 sT s in KCU y y Heat treatment.
Tape, GOST 10 160-75 20 295 590
- - mm % MPa MPa kJ/m2 % % -
Nailed tape, GOST 10 160-75 2 1080

Physical properties of the alloy:

Description Designation
- Alloy data acquisition temperature [Grad] - 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-cold)] -C -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

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 subsequent heat treatment is required

Delivery

All 80 HM grade products are certified. The technical documentation includes data on the chemical composition, the limiting percentage of impurities, 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 responsiveness of service.

Buy at the best price

Evek GmbH offers its customers an unlimited choice of precision alloys of the highest quality at a competitive price. If you can't choose, there are experienced managers who are always available and ready to advise you. Order with us and you will receive certified products that meet international quality standards in the shortest possible time. If you value your time, contact our nearest office today, or order online.