Precision Alloy Supplier | Invar, Kovar, Permalloy & Resistance Alloy Manufacturer
Our precision alloys are widely used in:
Transformers & Sensors (Soft magnetic properties)
Aerospace & Vacuum Devices (Expansion matching)
Semiconductor Equipment (High stability)
Precision Resistors (Stable electrical resistance)
China Precision Alloy For Sale
- Available Forms: Strip, Foil, Wire, Plate, Bar, Tube.
Key Grades: Invar 36, Kovar (4J29), Permalloy (1J85/1J50), Mumetal.
Thickness Range: 0.05mm – 50mm (Customizable).
Surface Finish: Bright, Polished, or Pickled.
Standards: ASTM F15, ASTM A753, AMS 7727, JIS, etc.
Our precision alloy products meet international standards and provide excellent mechanical properties and corrosion resistance. Whether you are looking for precision alloy suppliers, manufacturers, or want to know the market prices and stock, we can meet your needs. Contact us now to get accurate quotes and stock information!
Precision Alloy Technical Specifications & International Equivalents
Huaxiao Metal provides a comprehensive range of precision alloys, including soft magnetic, expansion, elastic, and resistance alloys. Our materials are manufactured in strict accordance with ASTM, AMS, and IEC standards, ensuring 100% compatibility with international brands like Hiperco, Invar, Kovar, and Permalloy.
Explore our grade comparison and available forms below to find the perfect match for your project.
Alloy Type | Grade (GB) | Equivalent / Common Name | Standard | Available Forms | Key Features |
|---|---|---|---|---|---|
Expansion Alloy | 4J29 | Kovar / ASTM F15 / Dilver P | ASTM F15, AMS 7727 | Strip, Wire, Bar | Low expansion, Glass/Ceramic sealing |
Expansion Alloy | 4J36 | Invar 36 / Nilo 36 | ASTM B753 | Strip, Wire, Bar | Extremely low expansion coefficient |
Soft Magnetic | 1J22 | Hiperco 50 / AFK 502 | IEC 60404 | Strip, Bar | Highest saturation induction |
Soft Magnetic | 1J79 | Permalloy / Mumetal | ASTM A753 | Strip, Wire, Bar | High permeability, Low coercivity |
Soft Magnetic | 1J85 | Super-Permalloy | ASTM A753 | Strip, Wire, Bar | Extremely high initial permeability |
Elastic Alloy | 3J21 | Elgiloy / Phynox | GB/T 15018 | Strip, Wire | High strength, Non-magnetic, Corrosion resistance |
Elastic Alloy | 3J53 | Elinvar / Ni-Span-C 902 | GB/T 15018 | Strip, Bar | Constant elasticity, Low temperature coefficient |
Resistance Alloy | 6J22 | Karma / NiCrAlCu | ASTM B267 | Strip | High resistivity, Low-temperature coefficient |
Resistance Alloy | 6J40 | Constantan / CuNi44 | ASTM B267 | Strip | Stable resistance over temperature |
Not finding the specific grade or size you need?
At Huaxiao Metal, we specialize in custom-machined components and non-standard dimensions. Whether you need a 0.05mm ultra-thin Invar foil or a high-purity Kovar bar for aerospace applications, our technical team is ready to assist.
- Free Technical Support: Get expert advice on material selection.
- Fast Quote: Receive a competitive price within 24 hours.
- Global Shipping: Reliable delivery to your facility.
Popular Precision Alloy Grades
4J36 Invar 36
Invar 36 is a low thermal expansion alloy widely used in precision instruments, semiconductor equipment, aerospace structures, and optical devices.
Key Benefits
- Extremely low thermal expansion
- Excellent dimensional stability
- Good machinability
- Stable performance at varying temperatures
4J29 Kovar Alloy
Kovar alloy provides thermal expansion compatibility with glass and ceramics, making it ideal for hermetic sealing applications.
Applications
- Electronic tubes
- Semiconductor packages
- Glass sealing components
- Aerospace electronics
1J79 Permalloy
1J79 Permalloy offers very high magnetic permeability and excellent magnetic shielding performance.
Applications
- Transformers
- Magnetic cores
- Precision sensors
- Shielding equipment
6J40 Constantan
Constantan alloy provides stable electrical resistance over a wide temperature range.
Applications
- Precision resistors
- Thermocouples
- Electrical instruments
- Heating systems
Technical Comparison of Typical Precision Alloys
| Grade | Density (g/cm³) | Curie Temp (°C) | Thermal Expansion (20-100°C) | Electrical Resistivity |
|---|---|---|---|---|
| 4J36 (Invar 36) | 8.1 | 230 | 1.2 × 10⁻⁶/°C | 0.78 μΩ·m |
| 4J29 (Kovar) | 8.3 | 435 | 5.0 × 10⁻⁶/°C | 0.48 μΩ·m |
| 1J85 (Permalloy) | 8.7 | 400 | 12.5 × 10⁻⁶/°C | 0.55 μΩ·m |
Precision Alloy Applications: High-Performance Material Solutions
1. High-Efficiency Power & Transformers (Soft Magnetic Alloys)
In modern electrical systems, energy loss is the biggest challenge. Our Soft Magnetic Alloys (1J79, 1J85 Permalloy) provide exceptionally high magnetic permeability and near-zero coercivity.
- Key Applications: High-frequency transformer cores, magnetic shielding, and current sensor components.
- The Advantage: Reduces eddy current loss and improves energy conversion efficiency.
2. Semiconductor & Vacuum Electronics (Controlled Expansion Alloys)
Thermal mismatch can cause chip cracking or seal failure. Our Kovar (4J29) and Invar 36 (4J36) alloys offer a thermal expansion coefficient that perfectly matches silicon and glass.
- Key Applications: Integrated circuit packaging, lead frames, and microwave vacuum devices.
- The Advantage: Ensures hermetic sealing and dimensional stability under extreme temperature fluctuations.
3. Aerospace & Defense Instrumentation (Precision Sensors)
Reliability in harsh environments is non-negotiable. Huaxiao’s Elastic Alloys (3J21, 3J53) and Expansion Alloys are designed for aerospace-grade stability.
- Key Applications: Flight control sensors, navigation instruments, and satellite structures.
- The Advantage: Maintains high fatigue strength and constant elasticity from cryogenic to high temperatures.
4. Precision Electronics & Medical Devices (Resistance & Stability)
For diagnostic imaging (MRI) and precision resistors, material consistency is key. We supply Karma (6J22) and Constantan (6J40) alloys for stable electrical performance.
- Key Applications: Precision resistors, medical diagnostic equipment, and high-stability communication systems.
- The Advantage: Offers an extremely low-temperature coefficient of resistance (TCR) for long-term accuracy.
Precision alloys are the backbone of high-end equipment, from aerospace sensors to semiconductor tools. With over 15 years of export expertise, Huaxiao Metal combines high-stability performance with an extensive ready-to-ship inventory. Whether you need standard specifications or custom-machined components, we provide the technical reliability your project demands.
Core Advantages of Huaxiao Precision Alloys
Extreme Dimensional Stability (Low Expansion): Our alloys, like Invar 36, maintain near-zero thermal expansion over a wide temperature range, ensuring the precision of optical and laser instruments.
Superior Magnetic Performance: High magnetic permeability and low core loss make our soft magnetic alloys (Permalloy) the ideal choice for high-sensitivity sensors and electromagnetic shielding.
Tailored Physical Properties: Through vacuum induction melting (VIM) and precise heat treatment, we control the chemical composition to within ±0.01% to guarantee consistent physical and electrical resistance.
Excellent Hermetic Sealing (Kovar): Our expansion alloys provide a perfect thermal match with glass and ceramics, ensuring reliable vacuum-tight seals in semiconductor and electronic packaging.
- Consistency & Reliability: With 15+ years of expertise, we ensure every batch meets strict international standards (ASTM/JIS), providing the stability required for aerospace-grade applications.
Why Source Precision Alloys from Huaxiao Metal?
15+ Years of Global Export Expertise: We understand international standards (ASTM, ASME, DIN, JIS) and complex logistics, ensuring a hassle-free importing experience to over 50 countries.
Massive Ready-to-Ship Inventory: We maintain a constant stock of Invar 36, Kovar, and Permalloy in various forms (Strip, Bar, Wire) to eliminate long lead times.
Quality Guaranteed: Every shipment is accompanied by a 3.1 MTC (Material Test Certificate) and undergone strict ultrasonic/magnetic testing.
- Flexible MOQ: With our large stock, we support small-batch trial orders for R&D and large-scale industrial production alike.
To ensure the precision of each alloy, our lab performs rigorous testing:
Thermal Expansion Testing (for Invar/Kovar)
Magnetic Property Measurement (Permeability & Coercivity)
Chemical Analysis (Spectrometric Analysis)
Ultrasonic Flaw Detection (for Bars and Plates)
Need a specific grade comparison or a 3D drawing for custom components? Our engineers are ready to help.
FAQ From Huaxiao Metal Supplier
What is Precision Alloy?
Precision alloy is a special functional alloy designed with controlled magnetic, thermal expansion, electrical resistance, or elastic properties for high-precision industrial applications.
What is the price of precision alloy steel?
The price of precision alloy steel is influenced by several factors:
Alloy Composition: The more alloying elements used in the steel, the higher the cost.
Manufacturing Process: Precision steel requires high-precision production methods (like heat treatment and exacting machining), which can raise the price.
Volume of Purchase: Bulk purchasing often results in lower per-unit costs.
Market Fluctuations: The price of raw materials can fluctuate, affecting the final cost of precision alloy steel.
Generally, precision alloy steel tends to be more expensive than regular steel due to its enhanced properties and the advanced processes used in its production.
Which industries use precision alloy steel?
Precision alloy steel is widely used across various industries:
Aerospace: For manufacturing aircraft parts, engine components, and other high-performance structures.
Automotive: In producing engine components, drivetrains, chassis systems, and suspension parts.
Machinery: For manufacturing high-precision tools, dies, molds, and machinery parts.
Energy: In oil and gas drilling, power generation, and the production of high-pressure vessels and heat exchangers.
Electronics: For the production of high-precision electronic components and devices.
What alloy is used in transformers?
Soft magnetic alloys such as 1J79 Permalloy are widely used in transformers because of their high magnetic permeability and low magnetic loss.
How do you choose the right precision alloy steel for your application?
| Required Property | Recommended Alloy |
|---|---|
| High Magnetic Permeability | 1J79 Permalloy |
| Low Thermal Expansion | 4J36 Invar 36 |
| Glass-to-Metal Sealing | 4J29 Kovar |
| Stable Electrical Resistance | 6J40 Constantan |
| Precision Elasticity | 3J21 Elastic Alloy |
What is the difference between precision alloy steel and regular alloy steel?
The main differences between precision alloy steel and regular alloy steel are:
Alloy Composition: Precision alloy steels have a more precise composition of alloying elements, typically with higher purity, providing superior performance.
Manufacturing Process: Precision alloy steels are produced under more controlled processes to ensure high-quality consistency across each batch, meeting stringent standards.
Performance: Precision alloy steels offer higher strength, hardness, corrosion resistance, and heat resistance, making them ideal for demanding applications in industries such as aerospace, precision tooling, and high-performance automotive parts.
How does precision alloy steel enhance the performance of mechanical components?
Precision alloy steel significantly improves the performance of mechanical components by:
Tensile Strength: It is capable of withstanding higher stresses, making it suitable for high-strength applications like automotive engine components and aircraft structures.
Wear Resistance: Precision alloy steel resists wear and tear, which is crucial for parts subjected to continuous friction, such as cutting tools and machinery components.
Corrosion Resistance: It provides excellent protection against corrosion, especially in harsh chemical or marine environments, increasing the longevity of parts.
High-Temperature Stability: It retains mechanical properties and dimensional stability even in high-temperature environments, making it ideal for engines, turbines, and other high-heat applications.
What are the main types of precision alloys supplied by Huaxiao Metal?
We supply four main categories: Soft Magnetic Alloys (e.g., 1J50, 1J79), Expansion Alloys (e.g., Kovar, Invar), Elastic Alloys, and Resistance Alloys. Each material follows strict ASTM and GB standards for high-end industrial applications.
Why is Kovar alloy critical for glass-to-metal sealing?
Kovar (4J29) has a thermal expansion coefficient that matches hard glass, ensuring stable vacuum sealing across a wide temperature range.
Do you have Invar 36 or Kovar in stock for immediate shipment?
Yes! As a leading precision alloy supplier with over 15 years of experience, Huaxiao Metal maintains a massive inventory of standard grades. Stock items can be dispatched within 72 hours.
Can you provide equivalents to Carpenter or VDM grades?
Yes, we Huaxiao Metal provide 100% equivalent materials to global brands like Nilo, Permalloy, and Hiperco, ensuring the same performance at a more competitive cost.
Get Precision Alloy Prices From Huaxiao Supplier
Looking for a reliable precision alloy supplier in China?
Huaxiao Metal supplies Invar, Kovar, Permalloy, Constantan, and custom precision alloy products for electronic, aerospace, semiconductor, transformer, and industrial applications.
Contact us today for:
- Latest precision alloy prices
- Stock availability
- Technical consultation
- Custom processing solutions
- Fast quotation support