Frequently Asked Questions

Neodymium magnets, also known as NdFeB or rare earth magnets, are permanent magnets composed of an alloy of neodymium, iron, and boron that forms the Nd₂Fe₁₄B tetragonal crystalline structure. They are the strongest type of permanent magnets commercially available, with a maximum energy product up to 52 MGOe, making them ideal for applications requiring high magnetic strength in compact sizes. Pronounced "nee-oh-DIM-ee-um," these magnets derive their power from neodymium's large magnetic dipole moment and the alloy's high coercivity, which resists demagnetization. At MAGNEZMATIC, we offer a wide range to suit various needs, from hobby projects to professional uses — always handle them carefully to prevent injury from their strong pull.

Neodymium magnets are essential in numerous industries due to their superior strength and compact size, enabling efficient designs in modern technology. In electronics, they power hard disk drives, speakers, headphones, and electric motors in devices like smartphones and electric vehicles. Medical applications include MRI machines for imaging and components in pacemakers for reliable performance. They're also common in renewable energy for wind turbine generators, as well as consumer products like magnetic closures for jewelry and secure fridge seals. At MAGNEZMATIC, customers frequently use them in DIY tools, sensors, and industrial separators — versatile enough for both everyday and high-tech demands.

Neodymium magnets are primarily made from an NdFeB alloy, consisting of approximately 29–32% neodymium (a rare earth element), 64–68% iron, and 1–1.2% boron, which forms the stable Nd₂Fe₁₄B crystalline structure responsible for their magnetism. Additives like dysprosium or terbium (up to 8%) may be included to enhance high-temperature resistance, while small amounts of aluminum, niobium, or copper improve stability. The alloy is typically sintered under high pressure and temperature, then coated with nickel, zinc, or epoxy to prevent corrosion, as the base material is prone to rusting. This composition allows for exceptional magnetic performance, though it limits operating temperatures to around 80–176°F without additives. MAGNEZMATIC sources high-quality versions tailored for durability in real-world conditions.

The "N" in grades like N35, N42, N48, or N52 stands for neodymium and indicates the maximum energy product (BHmax) in mega-gauss-oersteds (MGOe), a measure of magnetic strength per unit volume — higher numbers mean stronger magnets for the same size. For example, N35 offers about 35 MGOe for general use, N42 provides balanced performance at around 42 MGOe, N48 suits demanding pulls at 48 MGOe, and N52 delivers peak strength at 52 MGOe, though it's more brittle and sensitive to heat. Letters like "H" (up to 120°C) or "SH" (up to 150°C) after the number denote temperature ratings for elevated environments. On the commercial market, N52 is the strongest widely available grade, ideal for applications needing maximum holding force; select based on your project's size, temperature, and budget at MAGNEZMATIC