High Magnetostriction Permalloy 1J27 for Transducers and Audio Diaphragms

Product Summary: Permalloy grade 1J27 provides a high saturation magnetostriction coefficient (up to 30 ppm), enabling efficient magnetic-to-mechanical energy conversion. It is specifically designed for magnetostrictive transducers, speaker diaphragms, aerospace parts, magnetic bearings, and micro sensors. The alloy features low coercivity, fine-grained structure, and stable performance from -60°C to 130°C.

Key Selling Points

• High Magnetostriction Coefficient (up to 30 ppm): Delivers strong vibration output for transducer and audio applications, confirmed in magnetostrictive transducer projects.
• Low Coercivity (≤ 2.0 A/m): Ensures high sensitivity and fast response under alternating fields.
• Fine-grained Uniform Microstructure: Provides consistent vibration performance for diaphragms and precision sensing.
• Wide Temperature Stability (-60°C to 130°C): Maintains magnetomechanical properties without degradation.
• Low Residual Magnetism: Prevents signal drift in precision components.

Technical Specifications

Models and Options

Grade 1J27. Forms: strip, wire, stamped transducer cores, diaphragms.

Materials and Structure

Nickel-iron alloy (approx. 73% Ni, balance Fe). Fine grains after vacuum annealing. Thickness tolerance ±0.001 mm.

Applications

• Magnetostrictive transducers and actuators
• Audio speaker diaphragms and telephone earphone components
• Micro electromagnetic sensors and magnetic bearings
• Aerospace parts requiring magnetomechanical conversion
• Relay and transducer components

Customization

Custom thickness, width, stamped parts. MOQ 50 kg. Payment: 30/70. Delivery: FOB, FCA, DAP, CIF, CPT.

Case Study

A transducer manufacturer used 1J27 for a magnetostrictive actuator core. The high magnetostriction (28 ppm) allowed precise displacement control with 10μm accuracy over a wide temperature range.

FAQ

1. What is the typical magnetostriction value of 1J27? Saturation magnetostriction is 20-30 ppm.
2. Can this alloy be used for high-frequency vibration? Yes, effective up to 1 MHz with low eddy current loss.
3. Do you supply annealed or as-rolled strips? We supply vacuum hydrogen annealed strips for optimal magnetic properties.
4. Can you provide stamped diaphragm blanks? Yes, we can stamp thin diaphragms as per drawing.
5. What is the MOQ? 50 kg.
6. Is there a risk of demagnetization? No, low coercivity ensures stable operation under alternating fields.
7. How long does delivery take? 15-25 days for standard orders.

Inquiry Information

Contact Alex Zhang: chengyuan.alexey@gmail.com | Tel/WhatsApp: +86 13673186216

Image Filename and Alt Suggestions

Main image: permalloy-1j27-strip.png (Alt: Permalloy 1J27 strip for magnetostrictive transducers)
Detail 1: permalloy-1j27-packaging.png (Alt: Packaged high magnetostriction Permalloy)
Detail 2: permalloy-1j27-rolling.png (Alt: Rolling of Permalloy 1J27 strip)