It refers to the maximum magnetic energy that the material can be stored. Neodymium is the strongest type of permanent magnets, samarium cobalt is. Neodymium Magnets have. Neodymium magnets are often assembled into products using strong adhesives such as Loctite 325. Counter-bored neodymium magnets with opposite poles on the counter-bored faces provide a secure hold and because neodymium is the strongest magnetic material in the world a magnet just 5mm in diameter can be effective. * Orders of any size. 3 1. 15 for 10 to 99 items and save 20%. Magnetic Properties 41,300. mormonism differencesMormonism chart religion christian mormon thinks who mormons christians. Moderately priced. Generally, larger magnets are more potent than smaller ones, as they have more magnetic material. A magnetic field of 35 gauss is defined by the number “35,” which indicates the maximum strength of neodymium. The magnets are positioned with opposite poles facing one another, so that the magnets are attracting towards one another. Measurements taken off the center axis will vary. W. These values are based on both theoretical models and extensive laboratory testing. 22% in value. Our Superiority: Customized is Available! * T/T, L/C, Paypal and other payment accepted. Quantity. Taking the Residual Magnetism from the table as 12,000 gauss (12 KG), the field strength. Grades of ndfeb magnetsBuy strong neodymium magnets,rare earth magnets,n52 magnets reviews Magnet grade grades magnets neodymium strong rare earth strength n52 temperature strongest reviews buy should chooseGrades magnets teachersparadise. The small magnet has a pull force of 0. Most refrigerator magnets have a gauss rating of 50; The strength of a small magnet made of iron is equal to about 100 gauss; Rare earth magnets can have a gauss rating of 12,500 or more; More Information About Gauss Neodymium magnets are the strongest type of magnets that are permanent in nature. Reviewed by Osman Hafeji, Technical Support Engineer (March 2021) Neodymium magnets are permanent magnets (i. The magnetic strength of NdFeB magnets is closely related to the change in ambient temperature. Meanwhile, neodymium magnets, steadfast and unyielding, carve their niche in applications where sustained power is paramount. For example: N42 of sintered ndfeb magnet, BNP10 of bonded neodymium magnet, 30H of smco 2:17, alnico5, ferrite Y30 or PA6 of injection molding ferrite. Better performance than 2x1x1/2" magnets 22. Ceramic magnets are typically manufactured through sintering, similar to neodymium magnets. It is lower in cost but approximately 30% less potent than N52. Box Package, SCB250. Simplified, the rotating shaft of a wind turbine is connected to one or more strong magnets, usually neodymium magnets, these magnets turn. Neodymium Magnets Strength Chart. 65 T), the experiments on the magnetic field (MF) effects on water evaporation rate and surface tension were performed at room temperature (22–24 °C). Previously, grades of ferrite magnets where labelled with the letter ‘C’ then a number, for example C1, C2, C3. The bar chart shows the magnetic power (MGOe) of each type of magnet. Standard Magnet Strength. The higher the grade, or N number, the incrementa. Magnetic badges are a great alternative to traditional pin badges, they are high in magnetic strength, durable, lightweight, and they will not damage or. Neodymium Disc Magnet 15mm x 5mm N42. These values are based on both theoretical models and extensive laboratory testing. Magnetic. The magnetic field generated by 3T MRI (also known as 3 Tesla MRI) is made up of three layers of 3-tesla magnets. On returning to normal operating temperatures below 176 degrees F, there is an irreversible loss in magnetic strength and permanent damage. 5mm has a pull force of about 1. Review (3) Set of 100 Magnetic Badge Holder with Steel Back Plate - Name Badge Magnets. Neodymium N52 Disk Magnet 1mm x 1mm 1000pcs. There are some suffix letters following the grade such as M, H or SH. k. Magnetic induction B (also known as magnetic flux density) has the SI unit tesla [T or Wb/m 2 ]. Fridge Ferrite Round Disc Magnet 15 x. Be aware that standard neodymium magnets will lose strength if heated over 178°F. Read more about these two types of magnets. Neodymium ion borade magnets have not only found their way into almost billions of electric motors and electronic devices around the world but also into wonderful toys for children. Neodymium magnets are a permanent type of Rare Earth Magnet, made from neodymium, iron, boron and other transition elements. 26 inch x 1/8 inch, Pack of 12. 03 inches (0. This calculator only considers discs and cylinders that are magnetized along the cylindrical axis. Keep in mind that "ease of magnetization" is different from "strength of magnetization" because most materials that become easily magnetized are not strong magnets. But there's an even easier way to think of permeability. If you took the magnet out of a Mounting Magnet, you might only see half the pull force that you had fully assembled. The higher the grade, or N number, the incrementally stronger the magnet will be. 5 Teslas. Blackmore, (TRIUMF, 1985) and A. They will retain their power over hundreds of years. Despite offering substantial magnetic strength, they still fall short compared to neodymium magnets. 5 1. 6 Neodymium magnets are also used in wind turbines, aeronau cs and space. Nolen (National Superconducting Cyclotron Laboratory, 09/87) demonstrated SmCo having a better performance, with Sm 2 Co 17 offering 2-40 times. 200℃ (392℉) Neodymium Magnet ( also called Neodymium Iron Boron Magnet, Strong Magnet) can be supplied in different grade and size. Check out our full collection here. Nacho Magnets Strength Neodymium Motor Magnets Stock Aurora red/green 11. For even higher temperatures, N50M, N48H and N42SH are popular for industrial application. In summary, the longevity of a neodymium magnet depends on various factors, including environmental conditions, usage, handling, and the quality of the magnet. This is about 200 times the strength of the Earth’s magnetic field. 8kg. When classifying neodymium magnets according to their magnetic strength, the grades come into view. 75% this year. The neodymium magnets in a typical EV weigh up to 3kg (6 lb), but even at 1/12th of that weight, a neodymium magnet can support steel as heavy as prizefighter Tyson Fury, and will have about 18. 07 ounce) piece is enough to stick a substance more than 640 TIMES than its weight. “N52” represents the strength of the magnet. 49), so we want to identify them. 17 Jun 2019. Huge inventory, fast shipping. #1. This chart only applies to disc/cylinder magnets with the diameter and thickness shown. There are other N ratings of neodymium magnets. With a few assumptions, flux density (in Gauss) can be related to the expected pull force. $3. Strength magnets neodymium safety info. Three key magnetic properties include Remanence, Coercivity, and the (Maximum) Energy Product. They include countersunk holes or threaded features that allow for mounting with standard hardware (nuts and bolts), as well as various hooks. In general, higher numbers correlate with a stronger magnet. 5 times Ferrite magnets). Coeff. The Relationship between the Working Temperature and the Curie Temperature of a Magnet. k. There are eight different standard grades of neodymium magnets typically used in commercial applications today ranging from N35 to N52. Traditionally, magnetizing field H, is measured in amperes per meter. These are the strongest of the rare earth magnets and used in virtually every industry. At Stanford Magnets, we do not make any compromises on quality. 6 5. The necessary. This tool calculates magnetic field strength measured in gauss, on the centerline of a disc magnet or ring magnet magnetized through its thickness, at a distance of X from the surface of the magnet. The 12,000 Gauss neodymium grate magnet option has a pull strength of 13. The two most common rare earth magnets are Neodymium (Nd. Here I would like to mention an experiment done by. High energy for size. Block magnets are defined by three dimensions: Length, Width and Thickness. The number that follows is a little more technical because it represents the maximum energy. Neodymium magnets were first developed in 1982 by General Motors and Sumitomo Special Metals following the formulation of the alloy NdFeB, which is made of neodymium as well as iron and boron. 3 min read. They are made from inexpensive raw materials and are very economical to produce. Around 6-9 kilotonnes (kt) of neodymium were used for EVs in 2020, 15-20% of all permanent magnet use in 2020. For a comparison of neodymium material grades, please see our chart of material properties. Applications: These magnetic badge attachments are used for all types of name badges. Most of our magnets are grade N40 so if they are heated above 80˚C or 176˚F they will demagnetize and lose their strength. Our Repelling Force Magnet Calculator shows the repelling force generated between two same-sized magnets. At first4magnets. Buy Neodymium Magnets online with Bunting – eMagnets™. A ferrite or ceramic magnet usually. Looking at the purple line on the graph, it is a little bit hard to read at 100% D but the magnetic field would be about 2% of the Residual value. Neodymium grades can start as low as N25 and go as high as N55. Learn more about our 3/8"x1/16" Rare Earth Neodymium Disc Magnet. they generate their own magnetic field) made from an alloy of the metallic elements neodymium, iron and boron. They have an elaborate manufacturing process of vacuum melting, milling, pressing and sintering. Maximum energy product, also referred to as BHmax is calculated. The grade without suffix letter has maximum operating temperature 80°C, however N52 & N55 (the highest. References. A Neodymium (Nd-Fe-B) magnet is a common rare earth magnet composed of neodymium (Nd), iron (Fe), boron (B), and transition metals. If we go back further to Jan 1st 2018, when the cost of neodymium was $70. No amount of externally applied magnetic field will bring the magnet's strength back. 004” to 0. 49. pull. For neodymium magnets, this temperature is very high, typically above 900°C to 1000°C. Neodymium magnets are often. Stock & Custom Magnets; Magnets Manufacturing;50mm dia x 12mm thick x 6mm hole Coarse Pole Limpet Magnet - 50kg Pull. Add To Cart. 02 to 0. NdFeB magnet has various grades: each grade has its own magnetic properties, relating to strength of magnetic field output and resistance to demagnetization, maximum recommended operating temperature. 6kg. 3. Price Range:. These magnets can then sliced into smaller magnets or ground to tighter tolerances. 8 Compressive (MPa ) 1100 Tensile 74 Young's modulus GPa 170 VickersMagnetic Materials Information. Unit Conversion Calculator: This calculator deals with converting key magnetic units. Learn more about demagnetization (BH) curves for rare earth neodymium magnets. Of Thermal Expansion 3. They are widely used as. Many online calculators we've seen determine pull force based on a theoretical calculation of the flux density. The lower NdFeB magnet grades are no longer made and the range now starts at around N30 or N33. The maximum recommended temperature for the NdFeB magnets is +230 degrees C, whereas the SmCo can work at +300 to +350 degrees C. We can produce custom magnets that withstand high temperatures. 19lbs Pull. It is usually placed after the material name. Test results shown to allow comparison between plating options. If it is really important for you to know the grade, you can send magnets out to be tested. Water Treatment Magnets. For example, you are going to be driving your car during a storm. com stocks multiple widths and lengths of grate magnets and provides fast shipping for your convenience. m 2). Samarium Cobalt and Neodymium Iron Boron both make very strong magnets. e. The term “rare earth” can be misleading, because. 10 Pcs of N48 Neodymium Magnets 1/8 inch Cube. A Neodymium (Rare Earth) magnets Grade (eg:N42) is an accurate guide to the strength of a magnet. Having enough force to levitate it isn’t the problem. 7, the magnet can be operated at maximum working temperature before irreversable losses occur. Virginia Beach. Each one is unique, and there’s no. Neodymium Grades A Neodymium (Rare Earth) magnets Grade (eg:N42) is an accurate guide to the strength of a magnet. Neodymium dust and salts are very irritating to the eyes. Alnico 5: This is by far our most widely used guitar pickup magnet. add_box. Pull force, also known as magnetic pull, is a measure of the strength of a magnet's magnetic field. Neodymium (neo) magnets, which are part of the rare earth magnet family, are popular for their extreme strength in a compact size and weight, and for their high coercive force (they are permanently magnetized for use in temperatures below 590°F). Price - Chart - Historical Data - News. Developed in the 1970s and 1980s, rare-earth magnets are the strongest type of permanent magnets made, producing significantly stronger magnetic fields than other types such as ferrite or alnico magnets. A magnet grade is a good measure of the strength of a magnet. A rare earth magnet is a magnet made from one of the rare earth elements (of which there are 17) in the Lanthanide series of metals in the periodic table. With a few assumptions, flux density (in Gauss) can be related to. 11% of their magnetism when the temperature rises by 1 ℃. This gives the compound the potential to have high coercivity (i. Neodymium is the strongest type of permanent magnets, samarium cobalt is the second strongest. Magnet grade is the Arabic numerals used to distinguish the different properties. Low working temperature for heat applications, but higher levels of heat resistance materials are being. Developed in the 1970s and 1980s, rare-earth magnets are the strongest type of permanent magnets made, producing significantly stronger magnetic fields than other types such as ferrite or alnico magnets. In other words, a motor or device using N52 magnet (s) would have much higher performance than that using N35 magnet (s), and/or it would be much smaller and lighter. Specifications of Neodymium Magnets, Physical and Mechanical Characteristics, Magnetic Characteristics, Thermal Characteristics, Plating Characteristics . Neodymium (Nd), chemical element, a rare-earth metal of the lanthanide series of the periodic table. Make sure that all contact surfaces are clean and dry prior to bonding. A higher N is stronger. The Original K&J Magnet Calculator. strength (MPa 70 Density (Mg/m3) 4. There are eight standard grades of these permanent rare earth magnets. Standard grade neodymium magnets have a maximum operating temperature of 80 degrees Celsius. From magnetic map holders for holding large maps or charts in the field, to strong magnetic bulldog clips for organizing offices or homes, neodymium hook magnets for hanging commercial signs, installing trade show displays or countersunk magnets for mounting hardware, we offer a wide range of heavy-duty magnets for high-strength. If it is exceeded, then the small loss will not be recovered on. 15 Sep 2023. The bar chart shows the magnetic power (MGOe) of each type of magnet. From $8. The magnetic field is the tendency for a magnetic force to be induced on moving charged particles in the. Holiday magnetic thumbtack kits. Moisture Chart For Corn. Click here to go to our Repelling Force Magnet Calculator that shows the repelling force generated between two same-sized magnets. At first4magnets. WARNING: KEEP OUT OF REACH OF CHILDREN. In 1984, Sagawa, Hadjipanayis, and Croat independently discovered Neodymium magnet nearly at the same time. 00 per kg, neodymium changed –40. The magnet with Ni-Cu-Ni coating will have a much higher pull force than a magnet with plastic coating. Magnetic Properties. Neo magnets can be found in a variety of applications including high performance motors, brushless DC motors, magnetic separation, magnetic resonance imaging, sensors, switches. You can either use a small magnet with a higher energy product or a large magnet with a lower energy product for the same application. If these magnets are arranged according to their magnetic force from large to small, they are NdFeB magnet, SmCo magnet, AlNiCo magnet, and ferrite magnet. The pull force of a magnet is determined by the strength of its magnetic field and the size and shape of the magnet. Neodymium magnet strength. We offer a diverse range of Neodymium rare earth magnets in different sizes, grades, and shapes, including discs, blocks, rods, and rings. N50 is the highest readily available grade. Although this distance is commonly called an air gap, anything that comes between the magnet material and its ferrous mate will cause a variance in strength, including paint, coatings, paper. Magnets can repel each other with enough force. The strength of rare earth magnets. thick - 9. Neo Magnets are the strongest magnets. The magnets are positioned with opposite poles facing one another, so that the magnets are attracting towards one another. Neodymium magnets in the UK are the strongest commercially available magnets, meaning that they can lift objects many times their weight. In addition to their high magnetic. 2 °C; −425. 7, 10. For an in-depth explanation of how this calculator works, check out our Gap Calculator article. Samarium Cobalt is manufactured in two compositions: Sm 1 Co 5 and Sm 2 Co 17 - often referred to as the SmCo 1:5 or SmCo 2:17 types. 50. A round neodymium magnet with a diameter of 15mm and a thickness of 4mm has a pull force of about 2. Product Description. Continue reading → 1 - Neodymium iron boron (NdFeb) Neodymium magnets are the most powerful magnets available (per unit volume) with the ability to attract 1,000 times their own weight. Although the maximum possible energy product is calculated in to be N64, it is unlikely such high strengths of Neodymium will be achievable in the near future. We provide a variety of shapes (discs, blocks, spheres, and more) in sizes ranging from small to large, and grades, including N35, N42, and N52. This disc magnet has the power of N35 grade neodymium alloy and promises durability, consistency, and powerful magnetic strength. They have an elaborate manufacturing process of vacuum melting, milling, pressing and sintering. Horse bootHorse mountain chart footwear guide rider measurement Mountain horse mountain high rider ii tall bootNew mountain horse aurora. So, when defining your magnet need, keep in mind that the higher the number,. 118'' Thk. The magnet grade, or N rating, refers to the Maximum Energy Product of the material from which the magnet is made; it refers to the maximum strength the material can be magnetized to hold permanently. They are over 10 times stronger than the strongest ceramic magnets. Nd 2 Fe 14 B or Neodymium-Iron-Boron magnets can be sintered or bonded. com. 1. 5-degree wedge magnets 16 magnets form 8" OD x 4" ID x 1/4" ring High-performance wind generator magnets Grade N42 magnets Magnetized through-thickness. The number in the magnet grade refers to the strongest point of the material’s B-H curve, or its maximum energy product. Neodymium magnets come with an incredible magnetic field. 4 teslas. See Our Range of Neodymium Magnets. Commercially available neodymium. Samarium Cobalt Block Magnet. [SG STOCK] Various Magnet Sizes Neodymium Disc Circular Round Arts and Check Details. Additionally, these particles have a magnetic anisotropy of 4. This is the primary indicator of a magnets ‘strength’. The strongest magnet ever constructed weighed 34 tons and was 22 feet tall. Jun 10, 2009. To put the power of two. $0. 2-0. 5 and 11. Price - Chart - Historical Data - News. 6 ± 2 x 10 6 J/m 3, which is ten times larger than cobalt nanoparticles, and magnetic properties comparable to some rare earth. This data sheet covers the standard production range of NdFeB magnets (currently 55 grades) that are commonly. Identify the poles: Determine the weakened and strong permanent magnet’s north and south poles. 10% Off. Grade magnets 1st anchor chart 2nd science magnet activities. Neodymium magnets (also known as "NdFeB", "Neo" or "NIB" magnets) are permanent magnets made of neodymium, iron & boron. Our high-quality Rare Earth Magnets are made from alloys of rare-earth elements. Many online calculators we've seen determine pull force based on a theoretical calculation of the flux density. At room temperatures, NdFeB magnets exhibit the highest properties of all magnet materials. Roughly 2/3 of a neodymium magnet is composed of iron. You can measure the overall magnetic strength of a magnet (called the magnetic moment) or its local strength (called the magnetization for short). Most neodymium magnets are plated with. Review the typical magnetic and physical properties of Neodymium Magnets in our Permanent Magnet Comparison Chart. The grades of. Compared to its price of $109. Start simple. Align the magnets: Place the strong magnet’s north pole against the weakened magnet’s. they generate their own magnetic field) made from an alloy of the metallic elements neodymium, iron and boron. They are widely used as. Performance in your application under your specific test conditions may vary. Car magneticsCar custom dia magnet magnets Car magnets magnet sizesCar magnet custom oval magnets. Neodymium Magnets from Master Magnetics, the Magnet Source. Careful measurements with a fluxmeter noted the total magnetic moment of each magnet. Price. Ideal for home, school, office and shop. Measuring and Inspecting. Standard temperature neodymium magnets will begin to lose strength if they are heated above their maximum operating temperature, which is 180°F (80°C). $2. In stock and ready to ship. Copper and titanium may be added to increase magnetic strength. 3-3. Magnets don't pull with any lateral force when stuck to a steel plate. The necessary. Alnico magnets have 5 to 17 times the magnetic force of magnetite or lodestone. But the rate at which different types of magnets lose strength varies. WPH-LG. While N52 magnets have a strength of 52 MGOe, a magnet made to work in any direction might only achieve 10-12 MGOe. powerful magnets. Aquarium Magnets. 87 lbs. Set of small size neodymium magnet disk of 1 mm x 1 mm made from the world's strongest magnet grade N52 to create micro actuators. These indicate maximum working temperatures (we use celsius temperature), which range from M (up to 100 °C) to AH (220 °C). They're produced from rare earth minerals, which are among the world's most powerful things. It provides information about the strength of the magnet, how hard it is to demagnetize, and how a magnet's shape (or. Unexpectedly, after the. Meanwhile it shows how resistant it is to demagnetize, how a magnet’s shape affects. N52 magnets are the strongest neodymium magnets you’ll come. Neodymium (neo) magnets, which are part of the rare earth magnet family, are popular for their extreme strength in a compact size and weight, and for their high coercive force (they are permanently magnetized for use in temperatures below 590°F). List of Magnets by Strength. Strength magnets neodymium safety info neodymium cylindrical neodymium strength magnet neodymium grades magnetic reference properties following table their neodymium magnets carolina neodymium thicker. Neodymium magnets are permanent magnets (i. 70 per kg on Jan 1st 2021 it has increased +14. It’s possible to achieve field strengths up to 10,000 – 12,000 gauss (1. Fridge Magnets. Maximum energy product, also referred to as BHmax is. In terms of dollars spent per pound of pull force, they can be a better value than a plain magnet. Neodymium magnets are rare-earth magnet materials with the highest magnetic properties. Neodymium has one of the highest magnetic properties of any magnetic alloy. The following number comes from an actual material property, the Maximum Energy. Simple tests like a paper clip, coin, or magnet-to-magnet tests can further confirm if a magnet is made of neodymium. 5 tesla. Magnetic strength is most commonly measured in two ways: grade and. In stock and ready to ship. Permeability (electromagnetism) In electromagnetism, permeability is the measure of magnetization produced in a material in response to an applied magnetic field. In comparison to other types of magnets, rare earth magnets or neodymium magnets have a higher magnetic strength. N50 is the highest readily available grade. For this reason, neodymium magnets are also known as NdPr magnets. Neodymium magnets are graded by their maximum energy product (BH)max with N52 grade neodymium providing the greatest magnetic performance and N35 being the weakest. The number comes from an actual material property, the Maximum Energy Product of the magnet material, expressed in MGOe (Mega Gauss Oersteds). It has a diameter of 8mm and a height of 2mm and is axially magnetised through the 2mm thickness. Inspection Mirrors. Magnets made with neodymium are the strongest of the rare-earth magnets. Each one is unique, and there’s no simple formula for translating a system from one magnet type into the system for another. B = the magnetic field strength at the center,. *compiled from “General Safety Considerations for the Installation and Operation of Superconducting Magnet Systems”, Rev. Not only are they more potent, but they are also more compact, offering superior performance in a smaller package—a. The NdFeB magnets may be demagnetised by radiation. If you measure the one you have (or the pocket the missing one used to occupy), you can probably find that size online pretty easily. 04%. Neodymium magnets in the UK are the strongest commercially available magnets, meaning that they can lift objects many times their weight. The magnetic length. The main phase of this material is Nd 2 Fe 14 B and its maximum energy products achieved 280kJ/m3 at that time. 66 for 10 to 99 items and save 14%. NdFeB. Total demand for Rare Earth Oxides is seen growing at 4% per annum by CRU. Coeff. The magnet is 0. 10-100. The higher the Curie temperature of the magnet, the higher the working temperature and the better the temperature stability. To be “your magnet solution source About DIYMAG Bar Magnets . This force only increases with the magnet’s size. You can call us at (800) 330-1432 or send us a message online. Other common materials such as SmCo, AlNiCo, and Ferrite magnets are also listed as these can be produced to order as custom magnets. They are widely used as. I have a hard drive magnet stuck to my fridge and given its strength I would say its a rare earth neodymium magnet. The major application of neodymium is in high-strength permanent magnets based on Nd 2 Fe 14 B that are used in high-performance electric motors and generators,. Neodymium grades are from N35 to N52, with N45 considered one of the strongest grades. Since 2004, AEMagnet has been a trusted neodymium magnet supplier. Neodymium alloys are used to make high-strength neodymium magnets, a powerful permanent magnet. This small loss is fully recoverable on cooling, providing that the maximum operating temperature is not exceeded. Neodymium is a ductile and malleable silvery white metal. 2 Tesla) with small gaps, especially if. Neodymium (also known as "NdFeb", "NIB" or "Neo") disc magnets are the most powerful rare-earth magnets available today. I. 90%. Our business aims to operating faithfully, serving to all of our clients , and working in new technology and new machine continuously for Neodymium Magnet Strength Rating, Dc Neodymium Magnet Motor, Can You. Yet, N52 magnets are 50% stronger than N35 magnets (52/35 = 1. It all starts with the letter "N", representing neodymium. All neodymium magnets have both a south and north pole as shown in the illustrations below. Then the diameter (D) is 1 inch, the length (L) is 0. DIYMAG specialized in the research, development, application and production of high-qualified magnets and magnetic assemblies. Press these magnets into a drilled. How strong is grade N52? - Grade N52 strength is the highest neodymium magnet. For example, a neodymium magnet of grade N42 has a strength of 42MGOe. 3mm dia x 2mm thick N42 Neodymium Magnet - 0. com, we do not compromise on quality, the majority of our magnets are grade N42 or above, making them 20% more. [1] One tesla is equal to 10 4 gauss. 5, 11. LOVIMAG Super Strong Neodymium Disc Magnets, Powerful Rare Earth Magnets with Double-Sided Adhesive for Fridge, DIY, Building, Scientific, Craft, and Office Magnets - 1. W/m. Remember to follow safety precautions when handling these powerful. 001 tesla. Prices are GST Incl. They are assigned the values 35, 38, 40, 42, 45, 48, 50 and 52 with a prefix lettering, N (neodymium). It is the force required to prise a magnet away from a flat steel surface when the magnet and metal have full and direct surface-to-surface contact. It can be showed by the magnet’s Demagnetization Curve, or BH Curve – the strongest point is (BH)max. Sintered Neodymium Magnet. Temp.