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NdFeB knowledge

Identify, compare and accurately describe neodymium magnets for sale

Information about materials, applications, magnet quantities and sources helps you describe a lot accurately.

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Loose rectangular neodymium magnetsClearly identified magnet shapesRecord block, ring, disc and segment magnets separately.Disc-shaped neodymium magnetsQuantity & conditionDocument the net weight, coating and contaminants.Removed HDD magnet assemblyTechnical applicationsThe original application and nameplate help with the initial assessment.Electric motors as a source of NdFeB magnetsIndustrial applicationsIdentify and describe motors, generators and production lots.

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Data table · Factors

Literature-based factors and unused outliers

Only F-DD-REF, F-MS-REF and F-HS-REF are used for model calculations. Outliers remain visible so that conflicting publications are not silently combined.

7 Data rows

Sources reviewed as at 30/08/2026. Time-sensitive product, market and legal information should be checked directly against the source before a specific decision is made.

Factor IDTechnologyNdFeB kg/MWNd kg/MWDy kg/MWTb kg/MWSource / provenancePrimary sourceLimitations on use
F-DD-REFDirect-drive PMSG650180177JRC 2011 total magnet mass; NREL 2025 elemental massesOpen source ↗Reference factor used for transparent model calculations. 180+17+7 kg/MW are elemental masses, not total magnet mass.
F-MS-REFMedium-speed / hybrid PMSG1605041JRC 2011 total magnet mass; JRC 2024 elemental massesOpen source ↗Type-E-PMSG: Nd 50±20, Dy 4±3, Tb 1 kg/MW. For Vestas generators documented as HREE-free, Dy/Tb is set to 0 on a model-specific basis.
F-HS-REFHigh-speed geared low-PMSG801220JRC 2011 total magnet mass; NREL 2025 elemental massesOpen source ↗Use only where a high-speed permanent-magnet generator is documented for the model.
F-NONEDFIG / EESG / ASM without PM0000Generator designOpen source ↗0 kg NdFeB in the main generator; auxiliary drives are outside the system boundary.
OUT-2017Direct-drive PMSG, older range950———JRC CRM Factsheet 2020: 700–1,200 kg/MWOpen source ↗Mean value of 950 shown for reference only; not used in model calculations.
OUT-NREL21US offshore scenario 30 GW2,690———80.7 kt / 30 GW from NREL 2021Open source ↗Aggregated scenario implication; not a model-specific bill of materials and a clear outlier compared with JRC technology factors.
OUT-DOE22US offshore scenario2,950———DOE 2022 gives 2,700–3,200 kg/MWOpen source ↗Mean shown for reference only; not used in model calculations.

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