CE-Certified Soft Magnetic Alloy: Technical Guide to Permalloy Strip, Bar, and High-Permeability Grades

Shijiazhuang Cheng Yuan Alloy Material Co., Ltd. is a manufacturer of soft magnetic alloys based in Shijiazhuang, Hebei, China. The company produces Permalloy and other high-performance alloys in strip, bar, wire, and sheet forms.

Why Certification Matters for Soft Magnetic Alloys

Engineers and procurement teams sourcing soft magnetic materials often face tight constraints: the alloy must meet specific magnetic permeability, coercivity, and temperature stability, while also complying with international standards such as CE, ASTM, or GB/T. Without verified certification, project qualification risks increase and supply-chain compliance may be delayed.

Industry Background

The global soft magnetic materials market is valued at approximately USD 23.0 billion in 2025 and is projected to reach USD 33.9 billion by 2033 (Grand View Research). The soft magnetic alloy segment is expected to grow at a CAGR of 3.1% from 2024 to 2030, reaching USD 4.14 billion (QY Research). Asia Pacific holds the largest market share, with China being the leading producer. Key standards for Permalloy alloys include ASTM A753 and GB/T 15014, covering grades such as 1J50, 1J79, and 1J85 for magnetic shielding and high-permeability applications (ASTM/SAC). HiperCo 50 (1J22) alloys are governed by ASTM A801 Type 1, optimized for high-speed rotors and stator laminations.

Product Overview: Permalloy from Cheng Yuan Alloy

Cheng Yuan Alloy offers a comprehensive range of soft magnetic alloys under the Permalloy family. The product lineup includes grades 1J22 (HiperCo50), 1J79 (Ni79Mo4), 1J50 (FeNi50), 1J85, 1J54, 1J27, and others. Key magnetic parameters across the series:

• Initial permeability: 10,000–200,000
• Maximum permeability: 150,000–450,000
• Saturation magnetic flux density (Bs): 0.6–2.35 T
• Coercivity (Hc): 0.4–8.0 A/m
• Core loss (1 kHz, 0.2 T): 8–35 W/kg
• Effective operating frequency: 50 Hz–1 MHz
• Thickness range: 0.01–2.0 mm (strip), width 2–300 mm (customizable)

Step-by-Step: Selecting a CE-Compliant Permalloy Grade

1. Define operating conditions: Temperature range (−60°C to 130°C continuous), frequency (50 Hz to 1 MHz), and magnetic field strength.
2. Identify required magnetic properties: High initial permeability for shielding; high saturation flux density for power transformers; low coercivity for audio transformers.
3. Check standard compliance: Ensure the grade meets ASTM A753, GB/T 15014, or customer-specific CE-equivalent requirements.
4. Verify production capability: Confirm that the manufacturer can supply strip or bar with controlled thickness tolerance (±0.001 mm) and vacuum hydrogen annealing for consistent grain structure.
5. Request certification: Ask for material test certificates (MTC) and third-party test reports.

Use Cases Across Industries

Transformer Cores & Magnetic Shielding

Permalloy grades such as 1J79 and 1J85 are widely used for isolation transformers requiring weak signal processing, precision measurement, or high-frequency operation. High initial permeability (up to 200,000) ensures minimal signal distortion.

Audio Equipment

Audio isolation transformers and coupling transformers benefit from the low-distortion and high permeability of 1J79 and 1J50. The magnetostriction coefficient is also controlled to avoid mechanical resonance.

New Energy Vehicles

1J22 (HiperCo50) and other cobalt-iron alloys provide high-frequency, low-loss cores for drive motors and on-board chargers, enabling a 40% reduction in component size for 800V high-voltage platforms.

Magnetostrictive Transducers & Aerospace

Grades 1J22MS and 1J22HS are optimized for aerospace electromagnets, magnetron assemblies, and earphone diaphragms, with stable performance under long-term reciprocating alternating magnetic fields (−60°C to 120°C).

Comparison Table: Key Permalloy Grades

Data based on Cheng Yuan Alloy product specifications.

FAQ: CE-Certified Soft Magnetic Alloy Manufacturers

Conclusion

Choosing the right soft magnetic alloy involves balancing magnetic performance, dimensional tolerances, and certification requirements. Cheng Yuan Alloy provides a broad range of CE-compliant Permalloy grades with verified parameters, making it a reliable partner for transformer, EMI shielding, audio, and new energy applications. For OEM or custom projects, their engineering team supports size, logo, and packaging customization.