neodymium(NdFeB) magnets, samarium cobalt(SmCo5, Sm2Co17)magnets, Alnico magnets, permanent rare earth magnets.
NCMag™ supplier of aluminium (Al) nickel (Ni) cobalt (Co) magnets; manufacturer of alnico6, alnico8 magnets in china.

what's alnico(alnico5, alnico8) magnets? where's alnico2, alnico3 magnets manufacturers? how to buy aluminium nickel cobalt?

We generally offer Alnico on a customer by customer basis but we do stock a range of Alnico magnets and will add to this range as and when necessary. We can make Alnico with modified magnetic properties upon request.

Alnico is an alloy containing Aluminium (Al), Nickel (Ni), Cobalt (Co) hence its name Alnico. But Alnico actually contains more than just these three elements. It also contains Iron and Copper with some versions also containing Titanium and even Niobium. Alnico magnets were developed in the 1930’s and were the first “Real” performance permanent magnets. Alnico is produced by either a sintering method or, more commonly, a casting method. The as cast or as sintered shape is acceptable for many applications but surfaces may need to be ground for a smoother surface finish. The as cast look has darkened edges with a slightly rough texture; a machined face of an Alnico magnet has a bright silvery metallic surface and is usually extremely smooth as it is often precision ground.

The most commonly used Alnico is Alnico 5. But care should be used when using this terminology. There are 4 version of cast Alnico 5 plus a single version of sintered Alnico 5. Therefore a request for Alnico 5 could result in different performing magnets due to accidental interpretation of the grade requirement. There are 29 grades of Alnico. Alnico has many trade names used for naming the grades such as Columax, Alcomax 3SC, Alni, Hycomax, Ticonal, etc. China has given them names starting with the letters LNG followed by a number to try to give some clarity but this is not widely utilised. Most people still know Alnico under its more common grade names such as Alnico 5, Alnico 8, Alnico 9, Alnico 5DG, Alnico5-7, Alnico8HC, Alnico 6, Alnico 2, Alnico3, Alnico 500, Alnico 400, Alnico 600 and Alnico 700, etc.

magnetic properties of cast AlNiCo magnet

alnico magnets Aluminium (Al) Nickel (Ni) Cobalt (Co)
Grade Equivalent MMPA Class Remanence Coercive Force Max.energy product Density Rev. Temp. Coef. Curie Temp. Max. operating Temp.
Br Hc (BH)max D Br Hc Tc Tw
mT KGs KA/M Oe KJ/m3 MGOe g/cm3 %/°C %/°C °>C °C
ALNICO 3 LN9 680 6.8 30 380 9.0 1.13 6.9 -0.03 -0.02 810 450
ALNICO 2 LNG12 720 7.2 45 500 12.4 1.55 7.0 -0.03 -0.02 810 450
LNG13 700 7.0 48 600 12.8 1.60 7.0 -0.03 -0.02 810 450
ALNICO 5 LNG37 1200 12.0 48 600 37.0 4.65 7.3 -0.03 -0.02 810 525
LNG40 1250 12.5 48 600 40.0 5.00 7.3 -0.02 +0.02 860 525
LNG44 1250 12.5 52 650 44.0 5.50 7.3 -0.02 +0.02 860 525
ALNICO 5DG LNG52 1300 13.0 56 700 52.0 6.50 7.3 -0.02 +0.02 860 525
ALNICO5-7 LNG60 1350 13.5 59 740 60.0 7.50 7.3 -0.02 +0.02 860 525
ALNICO 6 LNGT28 1000 10.0 58 720 28.0 3.50 7.3 -0.02 +0.03 860 525
ALNICO 8HC LNGT36J 700 7.0 140 1750 36.0 4.50 7.3 -0.025 +0.02 860 550
ALNICO 8 LNGT18 580 5.8 100 1250 18.0 2.20 7.3 -0.025 +0.02 860 550
ALNICO 8 LNGT32 800 8.0 100 1250 32.0 4.00 7.3 -0.025 +0.02 860 550
LNGT40 800 8.0 110 1380 40.0 5.00 7.3 -0.025 +0.02 860 550
ALNICO 9 LNGT60 900 9.0 110 1380 60.0 7.50 7.3 -0.025 +0.02 860 550
LNGT72 1050 10.5 112 1400 72.0 9.00 7.3 -0.025 +0.02 860 550
Total 15 alnico magnets Aluminium (Al) Nickel (Ni) Cobalt (Co) magnets
Most Alnico magnet grades are anisotropic, they can only be magnetised in a single axis' direction. they are the more powerful magnet grades of Alnico. The others are isotropic they are weaker but offer more design and performance flexibility.

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.

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