neodymium(NdFeB) magnets, samarium cobalt(SmCo5, Sm2Co17)magnets, Alnico magnets, permanent rare earth magnets.
NCMag™ supplier of alnico(alnico5, alnico2) magnets; manufacturer of Aluminium (Al) Nickel (Ni) Cobalt (Co) for guitar parts in china.

what's alnico Aluminium (Al) Nickel (Ni) Cobalt (Co)? where's magnets alnico5, alnico8, alnico3 manufacturer? how to buy cast or sintered alnico magnet?

Alnico magnets are manufactured by a cast or sintered process. Production level cast Alnico magnets are produced by conventional foundry methods using resin bonded sand molds. The magnetic characteristics for some exotic grades of Alnico magnets are achieved during the casting operation and are due to the unique crystalline grain orientation developed during the process.

Sintered Alnico is a powdered metal and it is manufactured by compacting finely milled Alnico powder in a metallic mold. The resulting geometry is not fully dense and it must be sintered in a furnace to achieve a solid state.

The composition of alnico alloys is typically 8–12% Al, 15–26% Ni, 5–24% Co, up to 6% Cu, up to 1% Ti, and the balance is Fe. The development of alnico began in 1931, when T. Mishima in Japan discovered that an alloy of iron, nickel, and aluminum had a coercivity of 400 oersted (Oe) (32 kA/m), double that of the best magnet steels of the time.

how to used for alnico magnets?

It is high magnetic flux density, resistance to corrosion and excellent temperature stability, the maximum working temperature up to 600. Cast Alnico magnet is widely used in all kinds of sensors and meters, electronics,Magnetos, separators, sensors, electron tubes, traveling wave tubes, radar, holding magnets, coin acceptors, clutches and bearings, motors, distributors, bell ringers, guitar pickups, loudspeakers, security systems, cow magnets.

Alnico magnets are made from aluminum, nickel, cobalt, iron and a few other elements, such as copper, titanium, and sulfur. Alnico magnets are relatively easily demagnetized, but resisting oxidation well.

cast aluminum nickel cobalt(alnico) magnets

aluminum nickel cobalt(alnico) magnets
Grade Br Hc (BH)max Curie Temp. Temp.Coe US standard
mT/Gs KA/m(Oe) [KJ/m3][MGOe] C MMPA/Equivalent IEC/Equivalent
LN10 650/6500 42/530 10.0/1.20 810 0.030 Alnico3
LNG11 720/7200 37/480 11.2/1.40 810 0.030 Alnico1
LNG13 700/7000 50/620 13.0/1.60 810 0.030 Alnico 2
LNGT18 580/5800 90/1130 18.0 860 0.025 I.Alnico8
LNG16 800/8000 53/660 16.0/2.00 850 0.025 Alnico4
LNG34 1180/11800 44/550 35.0/4.30 860 0.020 Alnico5C
LNG37 1180/11800 48/600 37.0/4.65 860 0.020 Alnico37/5
LNG40 1220/12200 48/600 40./5.00 860 0.020 Alnico5
LNG44 1220/12200 52/650 44.0/5.50 860 0.020 Alnico44/5
LNG52 1250/12500 55/690 52.0/6.50 860 0.020 Alnico 5 DG
LNG60 1300/13000 56/700 60.0/7.50 860 0.020 Alnico5-7
LNGT28 1050/10500 56/700 28.0/3.50 860 0.020 Alnico 6
LNGT32 800/8000 104/1300 34.0/4.25 860 0.025 Alnico8
LNGT38 820/8200 110/1380 38.0/4.75 860 0.025 --
LNGT44 880/8800 120/1500 44.0/5.50 860 0.025 -
LNGT60 900/9000 110/1380 60.0/7.50 860 0.025 Alnico 60/11
LNGT72 1050/1050 112/1410 72.0/9.00 860 0.025 Alnico 9
LNGT36J 700/7000 140/1750 36.0/4.50 860 0.025 Alnico8HC
Total 8 cast Aluminium (Al) Nickel (Ni) Cobalt (Co) magnets
Aluminium (Al) Nickel (Ni) Cobalt (Co), Alnico standards
Grade Br Hc (BH)max Curie Temp Temp.Coe US standard IEC standard
mT[Gs] [KA/m]Oe] [KJ/m3]MGOe] ? ? Equivalent Equivalent Equivalent
FLN8 550/5500 530 9.01.13 760 0.022 S.Alnico3 Alnico9/3
FLNG12 700/7000 50/620 12.4/1.55 810 0.014 S.Alnico2 Alnico 12/6
FLNGT18 580/5800 90/1130 18.0/2.20 860 0.020 S.Alnico3 Alnico17/9
FLNG34 1100/11000 48/600 34.0/4.25 890 0.016 S.Alnico 5 Alnico 37/5
FLNGT28 1000/10000 57/710 28.0/3.50 850 0.020 S.Alnico6 Alnico37/5<
FLNGT38 800/8000 120/1500 38.0/4.75 850 0.020 S.Alnic 8 Alnico36/6
FLNGT42 880/8800 122/1530 42.0/5.25 850 0.020 Alnico38/11
FLNGT33J 700/7000 140/1750 33.0/4.13 860 0.020 S.Alnico 8HC Alnico36/15
Total 8 grade of high temperature Aluminium (Al) Nickel (Ni) Cobalt (Co) Alnico magnet

what is temperature/resistance of alnico magnet?

AlNiCo magnets are characterized by excellent temperature stability and good resistance to demagnetization from vibration and shock. Alnico magnets offer the best temperature characteristics of any standard production magnet material available. They can be used for continuous duty applications where temperature extremes up to 930F can be expected.

A chipped edge is considered acceptable if no more than 10% of the surface is missing. Cracks are acceptable as long as they do not extend across more than 50% of pole surface.

Cast alnico is melted and poured into a mold. Once solidified, the material is rough ground and then heat-treated and cooled, sometimes in a magnetic field. When treated in the presence of a magnetic field, the magnet is called anisotropic.

This orients the material to take on maximum magnetization. A cast magnet that is not heat-treated in a magnetic field is called isotropic. After heat treatment and cooling, the material can be ground to specific tolerances and then magnetized.

Alnico magnets produce magnetic field strength at their poles as high as 1500 gauss, or about 3000 times the strength of Earth’s magnetic field. Some brands of alnico are isotropic and can be efficiently magnetized in any direction. Other types, such as alnico 5 and alnico 8, are anisotropic, with each having a preferred direction of magnetization, or orientation. Anisotropic alloys generally have greater magnetic capacity in a preferred orientation than isotropic types. Alnico’s remanence may exceed 12,00, its coercivity can be up to 1000 oersted (80 kA/m), its energy product can be up to 5.5 MG·Oe. This means alnico can produce a strong magnetic flux in closed magnetic circuit, but has relatively small resistance against demagnetization.

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