China Customized Samarium Cobalt Block Magnets Manufacturers Suppliers Factory

Product Overview

Golds-Magnets sintered SmCo block magnets using SmCo5 and Sm2Co17 alloys via powder metallurgy. Magnetic field alignment during 150 MPa compaction optimizes flux density. These permanent magnets resist demagnetization and maintain continuous operation up to 350 deg C.

Custom Samarium Cobalt Block Magnets
Custom Samarium Cobalt (SmCo) block magnets maintain stable magnetic flux in environments where NdFeB grades suffer thermal demagnetization. Sintered from rare-earth alloys, these rectangular blocks operate up to 350°C and resist oxidation
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Precision Samarium Cobalt Block Magnets
Samarium Cobalt (SmCo) block magnets deliver stable magnetic performance in environments where Neodymium (NdFeB) fails due to thermal demagnetization. Utilizing a sintered rare-earth alloy of samarium and cobalt (Sm2Co17 and SmCo5), these
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High Coercivity Samarium Cobalt Block Magnets
Sintered Sm2Co17 block magnets engineered with intrinsic coercivity (Hcj) exceeding 25 kOe maintain magnetic stability in continuous operations up to 350°C without dysprosium additions. Composed of intermetallic Samarium and Cobalt
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High Temperature Samarium Cobalt Block Magnets
Sintered Samarium Cobalt (SmCo) block magnets deliver permanent magnetic flux stability in operational environments exceeding the thermal limits of NdFeB alternatives. Alloyed from rare-earth samarium and transition-metal cobalt, these
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Samarium Cobalt Rectangular Magnets
Samarium Cobalt (SmCo) rectangular blocks maintain stable magnetic performance in environments where NdFeB alloys demagnetize or oxidize. Manufactured under an ISO 9001:2015 and IATF 16949 certified quality management system, these
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Standard Samarium Cobalt Block Magnets
SmCo block magnets provide persistent magnetic fields in environments where Neodymium undergoes thermal demagnetization. Composed of SmCo5 or Sm2Co17 alloys, these sintered blocks retain magnetic stability up to 350 deg C with a low
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Product Types

Grade	Remanence (Br, kGs)	Coercivity (Hcb, kOe)	Max Energy Product ((BH)max, MGOe)	Max Operating Temp (deg C)
YXG-28	10.5 - 11.2	>= 9.5	26 - 28	250
YXG-30	11.0 - 11.8	>= 10.0	28 - 30	300
YXG-32	11.5 - 12.2	>= 10.5	30 - 32	300
YXG-33	11.8 - 12.5	>= 11.0	32 - 35	350

Technical Specifications

Specification	Details
Available Shapes	Rectangular blocks, square blocks, plates, and stepped geometries
Dimensions	Length 2 to 100 mm; Width 2 to 80 mm; Thickness 1 to 50 mm
Tolerance	Standard +/- 0.1 mm; precision grinding to +/- 0.01 mm on request
Magnetization	Through thickness, length, width, or custom multi pole fixtures
Coatings	Uncoated (passivated), Ni Cu Ni, Epoxy, or Parylene
Physical Properties	Density 8.2 to 8.4 g/cm3; Electrical Resistivity 0.5 x 10^-4 Ohm*cm

Key Features

Thermal Stability:

Reversible temperature coefficient of remanence of 0.030%/deg C (Sm2Co17 series).

Corrosion Resistance:

Iron free primary alloy phase provides higher oxidation resistance than NdFeB.

High Coercivity:

Withstands extreme opposing magnetic fields and electrical surges without degradation.

Applications

Aerospace & Defense: High temperature avionics actuators and guidance sensors.

Oil & Gas: Downhole MWD/LWD tools operating at 300 deg C.

Industrial Automation: High speed spindles and eddy current braking systems.

Medical Equipment: MRI gradient coils and particle accelerator beam steerers.

Customization

Machining: Wire cut EDM and diamond wheel grinding for complex slots, profiles, and chamfers.

Flux Matching: Calibrated within +/- 1% for multi block rotor assemblies.

Traceability: Laser engraved heat lot and batch serialization on individual blocks.

Manufacturing & Quality Control

Produced under ISO 9001 and IATF 16949 systems:

Melting:

Vacuum induction melting of high purity Samarium and Cobalt ingots.

Milling:

Closed loop nitrogen jet milling (3 to 5 um particle size).

Pressing:

Alignment in a 2 Tesla magnetic field at 150 MPa.

Sintering:

Vacuum furnace firing at 1200 deg C followed by thermal aging.

Metrology:

Hysteresigraph/Permeameter testing (Br, Hc, (BH)max), Zeiss CMM dimensional verification, and optical defect inspection.

Packaging & Documentation

Transport Compliance:

Cold rolled steel shielding boxes meeting IATA DGR and IMDG standards. Surface magnetic field verified below 0.005 pt at 2.1 meters prior to dispatch. Interleaved non magnetic spacers protect brittle edges.

Documentation:

Material Test Report (MTR) including magnetic values, chemical composition, dimensional sheets, and RoHS/REACH declarations.

FAQ

Q: Why choose SmCo over NdFeB?

A: SmCo retains stable flux output above 150 deg C and eliminates the iron matrix oxidation vulnerabilities inherent to NdFeB.

Q: How do you handle material brittleness during assembly?

A: SmCo has low mechanical ductility (approx. 50 to 60 HRC). Custom protective housings, chamfers, and careful stress management prevent edge chipping.

Q: What is the standard custom lead time?

A: 3 to 4 weeks encompassing raw material prep, sintering, precision grinding, and magnetic testing.

We're professional samarium cobalt block magnets manufacturers and suppliers in China, specialized in providing high quality products and service. We warmly welcome you to buy customized samarium cobalt block magnets at competitive price from our factory.