FAQ

Q: What types of magnets do you offer? A: We offer a wide range of permanent magnets, including: Neodymium (NdFeB)/Ferrite /Samarium Cobalt/Alnico /Pot Magnets/Magnetic Hooks/Magnetic Separators & customized solutions available Q: Which magnet material is the strongest? A: Neodymium (NdFeB) magnets are the strongest commercially available permanent magnets and provide the highest magnetic energy density. They are widely used in motors, sensors, electronics, medical devices, and industrial equipment. Q: What information should I provide when requesting a quotation? A: To help us recommend the best solution, please provide: -Magnet type and grade ie. Neodymium, N35 grade -Dimensions and tolerances -Magnetization direction -Quantity required -Required holding force -Operating temperature -Surface coating/corrosion resistance requirements -Application details -Drawings or specifications (if available) -Environmental conditions Q:. What magnet grades are available? A: Neodymium magnets are available in various grades such as: N35/N38/N42/N45/N48/N50/N52 （please check our properties chart) Higher grades generally provide stronger magnetic performance in the same size. Q: Do magnets lose their strength over time? A: Under normal operating conditions, permanent magnets can retain their magnetic properties for decades. However, excessive heat, mechanical shock, corrosion, or exposure to strong opposing magnetic fields may cause partial loss of magnetism. Q: What temperature can magnets withstand? A: The maximum operating temperature depends on the material: Neodymium (80°C to 200°C) Ferrite (Up to 250°C) Samarium Cobalt (250°C to 350°C) Alnico (Up to 500°C) Q: Are neodymium magnets suitable for outdoor use? A: Standard neodymium magnets should be protected from moisture and corrosive environments. Nickel plating provides basic protection, while epoxy coatings, rubber coatings, or sealed assemblies are recommended for outdoor applications. Q: Can magnets be used underwater? A: Yes, provided they are properly protected with waterproof coatings or housed within sealed assemblies designed for submerged environments. Standard nickel-plated magnets are not recommended for long-term underwater use. Q: What industries use magnets? A: Magnets are widely used in: Automotive/Electronics/Medical Equipment/Renewable Energy/Industrial Automation/Aerospace/Telecommunications/Consumer Products/Scientific Research/Food Processing Q: Why are magnets coated? A: Coatings help: Prevent corrosion/Improve appearance/Increase wear resistance/Enhance environmental protection Common coatings include Nickel (Ni-Cu-Ni), Zinc, Epoxy, Gold, Parylene, Teflon. Q: Can I order sample qty and what is the minimum order quantity (MOQ)? A: Yes, samples are often available for evaluation, testing, and prototyping, though availability depends on the product type and stock status. The MOQ varies based on your specific product, size, and customization requirements. Please contact us with your specifications to request samples and receive a detailed quotation. Q: What are leadtimes for sample and bulk? A: Leadtimes depends on your magnet type, specs, volume and whether there are tooling requirements, custom magnets range from from 4-8 weeks. Please send us your specifications for more information. Q: Are there existing formulas with HRE-free (Heavy rare earth) neodymium magnet grades: A: Yes there are established formulas for FRE-Free neodymium magnets that achieve high coercivity and temperature resistance without using Dy, Tb, Gd, or Ho. Please contact us with your specifications for more information. Q: Which magnet type requires export licensing from China’s Ministry of Commerce (MOFCOM)? A: Samarium-cobalt (SmCo) and Neodymium (NdFeB) permanent magnets containing heavy rare earth elements such as Tb, Dy usually –with high temperature such as –UH –EH - TH Q: Why choose All Magnet? A: Over 40 years of magnetic industry experience Comprehensive magnet and magnetic assembly solutions Custom technical support Consistent product quality Global supply capability Competitive pricing and reliable delivery