Samarium Cobalt Magnet (Sm2Co17)

Description

1. Product Overview

The Samarium Cobalt Magnet (Sm2Co17) represents the pinnacle of high-temperature, corrosion-resistant rare-earth magnetic technology, engineered for mission-critical industrial applications where failure is not an option. Primarily used in aerospace, defense, oil & gas, and advanced automotive systems, this product delivers exceptional magnetic stability and coercivity in extreme thermal and corrosive environments. Its key value proposition lies in outperforming conventional magnets—such as NdFeB—under elevated temperatures (up to 350°C) while requiring no protective coatings. Strategically, Sm2Co17 is indispensable for industries transitioning to higher-efficiency, higher-durability electromechanical systems, ensuring supply chain resilience and operational longevity.

2. Key Specifications & Technical Characteristics

• Chemical Composition: Sm₂Co₁₇ (Samarium 24–26%, Cobalt balance, plus trace Iron, Copper, Zirconium for phase stabilization)

• Magnetic Grade: Up to 33 MGOe (Maximum Energy Product) available; temperature-stabilized variants (e.g., 2:17 series)

• Purity Level: Rare earth purity ≥99.5% (on Sm); Co ≥99.8%

• Physical Characteristics: Sintered blocks, discs, rings, arcs, or custom machined shapes; metallic silver-gray; density: 8.4–8.5 g/cm³; grain size: 5–15 µm

• Packaging Options: Anti-static vacuum-sealed foil with desiccant; magnetized or unmagnetized delivery; industrial-grade shock-proof wooden crates

• Shelf Life: Indefinite if stored <200°C, <90% non-condensing humidity, and ≤0.5T external field (no degradation of intrinsic properties)

3. Core Industrial Applications

• Aerospace & Defense: Actuators, gyroscopes, traveling wave tubes (TWTs), and missile fin guidance systems – outperforms alternatives due to zero oxidation risk at altitude and high reversible temperature coefficients.

• Oil & Gas Downhole Drilling: Directional drilling sensors, MWD (measurement-while-drilling) tools – superior performance at 200–300°C where NdFeB would irreversibly lose >30% flux.

• High-End Automotive & Motors: Electric power steering, hybrid/electric vehicle synchronous motors – efficiency advantage: lower eddy current losses (high resistivity: ~80 µΩ·cm) versus NdFeB, enabling higher RPM.

• Medical & Industrial Imaging: MRI magnetic shims, precision magnetic separators – cost advantage: no nickel/copper plating needed, eliminating peeling failure modes in sterile or abrasive environments.

4. Competitive Advantages

• Quality Consistency: ISO 9001:2023 and AS9100D certified production; each lot undergoes BH-curve verification, thermal coefficient testing (α, β), and Hk/Hcj ratio ≥90%.

• Supply Reliability: Dual-source raw material contracts (China + North America) with 12-month rolling forecast buffer stock; no single-point geopolitical exposure.

• Logistics Capability: Global distribution hubs (Rotterdam, Houston, Shanghai); 48-hour dispatch for stock shapes; dedicated hazardous material (DG Class 9) logistics.

• Price Competitiveness: Direct sintered block manufacturing + captive wafering/grinding = 18–22% lower landed cost vs. European/US peers for equivalent Sm2Co17 grades.

• Sustainability & Technical Support: 95% cobalt recovery from production scrap; full FEA magnetic simulation service and material certification traceable to mill test reports.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): BULK 20MT (mixed shapes/grades permitted; single grade minimum 5MT per line item)

• Loading Capacity: 20 MT per 20-foot standard dry container (palletized, max. 1,200 kg per pallet, 16–18 pallets per container)