Moly Permalloy Strip（Alloy 80，Hi-mu 80）
Product Introduction
Are you struggling with how to purchase a molybdenum permalloy strip? Are you having trouble finding a suitable supplier, or are you concerned about inconsistent market pricing? Or perhaps you're worried about being scammed on your first purchase...
The following information is based on our accumulated experience in procurement and is for reference only. In fact, when you encounter a Molybdenum Permalloy strip, you've entered the core field of precision soft magnetic materials. This isn't ordinary metal procurement; you're purchasing a "physical functional material carefully designed to optimize specific electromagnetic properties."
Please focus on the core: purchasing moly permalloy strip is essentially purchasing a comprehensive package of electromagnetic properties that maintain extremely high magnetic permeability at high frequencies while also possessing high resistivity. Its performance is "designed," not naturally occurring.
Typical Application Scenarios
(Determining Your Procurement Direction):
- High-frequency magnetic components: High-frequency transformers and inductor cores (especially toroidal cores) used in switching power supplies.
- Precision sensors Include Fluxgate sensors and high-precision current transformers.
- Electromagnetic shielding: Precision shielding enclosures with high-efficiency shielding requirements for low-to-medium frequency electromagnetic interference.
- Recording heads: Magnetic head chips for traditional high-fidelity recording equipment.
Key tip: If your client is a "magnetic component engineer" or "power supply designer," they are most concerned with the performance of the material's "initial permeability (μi)," "high-frequency losses (including eddy current loss and hysteresis loss)," and "saturation magnetic flux density (Bs)" at specific frequencies.
Molybdenum permalloy strip is expensive, costing tens of times more than ordinary stainless steel strip. Buyers generally pay for its "precise electromagnetic functionality." Therefore, your negotiation focus should not be on the unit price, but rather on "performance guarantee clauses" and "technical support capabilities" (such as providing cutting and heat treatment guidance). Our minimum order quantity is relatively flexible depending on the characteristics of this type of material, but custom specifications have minimum order requirements.
Procurement Specifications and Industry Standards
For the procurement of moly permalloy(Alloy 80, Hi-mu 80)in these high-tech fields, your inquiry specifications must directly address the core electromagnetic performance. Generally, this includes the following points:
1. Clearly specify the required grade and standard:
Preferably use the Chinese national standard: 1J85 (or 1J79) from GB/T 15018-1994. Or an international equivalent: Specify chemical composition requirements equivalent to "80Ni-4Mo-Fe based alloy with high permeability".
Emphasize the final delivery condition: Must be clearly stated in capital letters as "Cold-rolled + hydrogen/vacuum final high-temperature annealed condition". This is crucial for performance.
2. Precise dimensions and tolerances:
Thickness, width, and length. Thickness is critical, directly affecting the lamination factor and losses in high-frequency applications. Tolerances are often required at the ±0.002mm level.
3. Core electromagnetic performance requirements (the soul of the technical agreement):
Must clearly list and set minimum values: "The material, in the delivered annealed state, after testing with a toroidal sample, must have an initial permeability (μi @ 0.4 A/m) ≥ 80,000 and a coercivity (Hc) ≤ 1.5 A/m."
A specific test frequency can be specified: For example, "The amplitude permeability measured at 10kHz frequency must be ≥ [specific value]".
4. Special requirements:
Surface insulation coating: Is a phosphate or magnesium oxide insulation coating required on the strip surface? This is a common requirement for manufacturing laminated cores and further reduces eddy currents.
Flatness and burrs: The strip must be flat and free of burrs on the edges to prevent short circuits in the laminations.
Test report: The supplier must provide a DC magnetic performance test report (B-H curve and μ-H curve) for the batch.
Packaging: Moisture-proof, pressure-resistant, and scratch-resistant precision packaging.
Processing difficulty and key points
(understanding the reasons for high prices)
Although the Moly Permalloy alloy strip(Alloy 80, Hi-mu 80)you receive may seem small and unremarkable, its manufacturing process is extremely demanding. It requires vacuum induction melting (VIM) to ensure extremely high purity and precise composition control. The hot and cold rolling processes involve multiple stages and precise control to achieve a uniform, micrometer-level thickness. Finally, the heat treatment involves prolonged annealing at over 1000°C in pure hydrogen or a high vacuum to relieve stress, form a large-grain texture, and achieve optimal magnetic properties. This is the core technical secret and the main cost driver.
Subsequent processing restrictions are stringent:
After purchasing annealed strip material, users are strictly prohibited from welding, severe shearing, or any rough handling that introduces stress. Stress relief annealing is usually required after shearing to restore performance.
Optimal procurement strategy:
If used for making magnetic cores, it is best to prioritize purchasing finished toroidal, EI-shaped, or other types of magnetic cores directly from specialized manufacturers, as they can control the entire process from strip material to finished product.
For more information, please contact:
Email: susan@lorkgroup.com
WhatsApp: +86 19937075488
Chemical Composition
When procuring goods, suppliers are required to provide material reports, primarily to verify nickel content and impurity control. The following is a typical range:
| Weight% |
Alloy 80 |
| Ni | 80% |
| Mo | 4-6% |
| Mn | 0.50% |
| Si | 0.35% |
| Fe | Bal |
Mechanical Properties
The final annealed material is very soft, with low strength and hardness, and good ductility. Its mechanical properties are sacrificed in favor of its electromagnetic properties.
| Material | (Annealed) |
| Initial magnetic permeability μi | ≥ 60,000 - 100,000 (at 0.4 A/m) |
| Maximum magnetic permeability μm | 300,000 - 500,000 |
| Coercivity Hc | ≤ 1.0 - 2.0 A/m (lower values are better) |
| Resistivity ρ | ≥ 0.55 μΩ·m |
| Saturation magnetic induction intensity Bs | 0.75 - 0.85 T |
Our golden advice for you:
- Deeply integrate with technology: Develop a technical agreement for purchasing moly permalloy strips in collaboration with your magnetic component engineers.
- Review the supplier's "core capabilities": Focus on evaluating the equipment level and calibration status of their vacuum heat treatment furnaces (hydrogen or vacuum) and magnetic performance testing laboratories.
- Implement a first-sample qualification system: Insist on "test first, then mass production," making third-party test reports a prerequisite for bulk payment.
- Clearly define responsibilities in the contract: Include substandard performance as a core basis for returns and claims in the contract.
Hot Tags: moly permalloy, alloy strip, alloy 80，hi-mu 80, China moly permalloy strip manufacturers
You Might Also Like
Send Inquiry