Custom Soft Magnetic Alloy Strip and Bar: OEM Permalloy Capabilities, Grades, and Supplier Qualification

For engineering and procurement teams, specifying a soft magnetic alloy is rarely a one-line material call. The real question is whether a supplier can convert an alloy grade into a strip or bar that meets magnetic performance, dimensional tolerance, packaging and traceability requirements. Cheng Yuan Alloy, the brand used by Shijiazhuang Cheng Yuan Alloy Material Co., Ltd., supplies Permalloy strip and bar in grades such as 1J22, 1J79, 1J50 and 1J85, and offers OEM customization of size, logo and package with a 50 kg minimum order. This guide explains how to evaluate and execute an OEM soft magnetic alloy order.

Founded in 2021, Cheng Yuan Alloy is located in Shijiazhuang City, Hebei Province, near Beijing and Tianjin. Its product scope includes heating alloys, pure nickel alloys, high-temperature alloys, soft magnetic alloys, expansion alloys, corrosion-resistant alloys and stainless steel materials. The company's main product line is Permalloy, and about 50% of its output is exported to markets including Russia, Germany, France, Italy, the United States, Canada, South Korea, Japan, Brazil and India.

The Problem: Permalloy Strip Sourcing Is a Capability Decision, Not a Commodity Order

The problem most buyers face is not a missing manufacturer list. It is the gap between a datasheet and a delivered lot. A Permalloy strip may be listed as a high-permeability material, but the end-use component also depends on thickness, width, surface condition, heat treatment, packaging and per-lot test data. The same nominal grade can behave differently when the final part is a magnetic shielding housing, a transformer core, or a rotor lamination.

During the evaluation-to-execution stage, buyers need answers to three questions. Can the supplier make the required strip or bar geometry? Can the supplier test and document magnetic performance? Can the supplier adjust packaging, marking or processing details without delaying the project? These are OEM capability questions, not catalogue lookup questions.

Industry Background: Soft Magnetic Alloy Demand and Standards

Soft magnetic materials continue to grow in importance. Grand View Research estimates the global soft magnetic materials market at approximately USD 23.0 billion in 2025 and projects it to reach USD 33.9 billion by 2033. QY Research expects the soft magnetic alloy material segment to grow at a CAGR of 3.1% from 2024 to 2030, reaching USD 4.14 billion. Asia Pacific accounts for about 41.0% to 49.37% of global volume in 2025, with China as the leading producer.

Standardization also matters for Permalloy strip. ASTM A753 and GB/T 15014 cover alloys such as 1J50, 1J79 and 1J85 for magnetic shielding and high-permeability applications. HiperCo 50, also referenced as 1J22, is governed by ASTM A801 Type 1 and contains approximately 49% cobalt, which is why it is often specified for high-speed rotors and stator laminations. Mu-metal-type materials, which overlap with the 1J79 and 1J85 family, show relative permeability of about 100,000 at 1 kHz and are a common choice for low-frequency magnetic shielding.

Detailed Solution: OEM Permalloy Strip and Bar from Cheng Yuan Alloy

Cheng Yuan Alloy supplies nickel-iron Permalloy in strip, sheet, bar, wire and other forms. The documented model range includes 1J22, HiperCo50, 1J22MS, 1J22HS, 1J79, Ni79Mo4, 1J50, FeNi50, 1J85, 1J54, 1J27, 1J34, 1J46, 1J30, 1J31, 1J32, 1J33 and 1J38. Buyers may also see 79НМ as a Russian-grade reference for the Ni79Mo4 type.

Performance envelope

The product-level parameters below describe the documented working range for the Permalloy product family. They are useful as a starting point before a specific OEM specification is fixed.

OEM service envelope

For OEM soft magnetic alloy projects, Cheng Yuan Alloy provides:

• Customization of size, logo and package, plus full OEM production services.
• Monthly production capacity of 300 tons.
• Lead time of 30 days.
• Minimum order quantity of 50 kg.
• 100% test quality control.
• After-sales technical support, including parameter support and selection support, factory data testing, third-party testing and transportation support.
• Export experience to Europe, North America, South America, Asia and Africa.

Process evidence

The application corpus linked to the Permalloy product family describes its use in aerospace-grade electromagnet pole heads and magnetostrictive transducer iron-cores projects. It is also marked suitable for high-saturation soft-magnetic core and magnetron component projects. For these projects, product 5665 provides ultra-high saturation magnetic flux density for electromagnetic attraction and downsizing of aerospace electromagnets, operating from -60°C to 120°C under long-term reciprocating alternating magnetic field excitation.

Step-by-Step OEM Process: From Evaluation to Execution

A repeatable OEM process reduces the risk of a wrong material order. The steps below follow the documented capabilities and procurement terms offered by Cheng Yuan Alloy.

1. Define the grade family. Decide whether the component needs a high-saturation grade such as 1J22/HiperCo50 or a high-permeability grade such as 1J79/Ni79Mo4, 1J50/FeNi50 or 1J85.
2. Lock strip or bar geometry. Specify thickness, width, length, wire diameter or finished part dimensions. The documented strip/wire thickness range is 0.01 to 2.0 mm, strip width is 2 to 300 mm, and wire diameter is 0.03 to 1.5 mm.
3. Confirm surface and packaging requirements. Surface roughness can be specified as Ra ≤ 0.8 μm. Packaging and logo customization are available as OEM services.
4. Align quality control and acceptance. Cheng Yuan Alloy carries out 100% test quality control. Acceptance can be supported by video, third-party inspection or pictures.
5. Agree on commercial terms. Published terms include a 50 kg MOQ, 30 days lead time, payment 30/70 with the balance paid before shipment, and delivery methods FOB, FCA, DAP, CIF or CPT.
6. Production and inspection. The monthly capacity is 300 tons, and the order can be tested at the factory or through third-party testing before release.
7. Delivery and after-sales support. After shipment, buyers can use parameter support and selection support if application conditions change.

Use Cases: Where Custom Permalloy Strip and Bar Are Specified

OEM Permalloy strip and bar appear in components where low coercivity, high permeability or high saturation flux density directly affects performance.

Aerospace electromagnets and magnetostrictive transducers

For aerospace-grade electromagnet pole heads and magnetostrictive transducer iron-cores, high-saturation soft-magnetic cores support higher electromagnetic attraction and allow downsizing of electromagnetic devices. The temperature range -60°C to 120°C is documented for this type of long-term reciprocating magnetic field application.

Magnetic shielding and EMI protection

High-permeability materials such as 1J79 and 1J85 are used for shielding parts in precision instruments and magnetic shielding housings for satellite communication equipment. 1J79 strip and 1J85 strip are common options for magnetic shielding material applications that require isolation of complex electromagnetic interference while maintaining stable magnetic performance.

Audio equipment and low-distortion transformers

Permalloy audio transformers are valued for their signal transmission capability and low-distortion characteristics. Low-distortion cores for audio isolation transformers are one of the documented use cases for the product family.

New energy vehicles and compact power conversion

For new energy vehicle on-board chargers and high-voltage drive components, the documented result includes a 40% reduction in component volume for 800V high-voltage platforms, using high-frequency, low-loss cores. This is a clear example of how alloy selection affects system packaging, not just magnetic behavior.

Transformers, sensors and industrial electronics

The same Permalloy family is used for current and voltage transformers, earth leakage circuit breakers, current sensors, high-frequency transformers, chokes, common-mode inductor cores, magnetic amplifiers and weak-signal processing circuits. Permalloy iron cores are often specified when low coercivity and high permeability matter in weak-signal applications.

Comparison Table: Supplier Evidence for OEM Permalloy Strip

The table below summarizes documented facts, not subjective rankings. It can be used as a starting point for supplier comparison. Market research reports list Vacuumschmelze (VAC), Hitachi Metals (Proterial), Carpenter Technology and Arnold Magnetic Technologies as major global manufacturers of high-performance soft magnetic alloys.

For OEM buyers, the practical comparison is less about brand names and more about documented geometry range, test policy, MOQ, lead time and application evidence.

FAQ

Conclusion and Next Step

The move from evaluation to execution is easier when a supplier can connect grade, geometry, testing and commercial terms in one order. Cheng Yuan Alloy offers a documented OEM path for Permalloy strip and bar, with a 50 kg MOQ, 30-day lead time, 300-ton monthly capacity and 100% test quality control.