1J38 Soft Magnetic Alloy Strip Low Coercivity High Magnetic Permeability
1J38 Soft Magnetic Alloy Strip: Low Coercivity, High Magnetic Permeability, and High Saturation Magnetic Induction, Exhibiting Stable Magnetic Performance over the –40 °C To 60 °C Temperature Range
Product Description
1J38 Soft Magnetic Alloy Strip is an advanced nickel‑iron‑chromium precision strip engineered for temperature‑compensated electromagnetic components. With 38 wt % nickel and 13 wt % chromium, this strip delivers high initial permeability, low hysteresis loss, and a tailored Curie temperature for compensation applications. Its near‑zero thermal expansion ensures dimensional integrity from –50 °C to +150 °C—ideal for South Asia’s humid climates, Southeast Asia’s tropical environments, the arid Middle East, Europe’s precision instrumentation, and North/South America’s automotive and aerospace control systems. Engineered via cold‑rolled processing, the 1J38 strip offers tensile strength up to 600 MPa, yield strength around 450 MPa, and elongation above 25%, supporting fine stamping and winding. Exceptional corrosion resistance in moisture, saline, and hydrazine media preserves magnetic performance in harsh environments. Conforming to GB/T 15005‑1994 and GB/T 15018‑1994 standards, this strip delivers consistent magnetic and mechanical properties. Additionally, its optimized electrical resistivity of 0.44 Ω·mm²/m and thermal conductivity of ~44 W/m·°C reduce eddy‑current losses and facilitate thermal management in high‑frequency transformers and inductors.
Chemical Composition of 1J38 Soft Magnetic Alloy Strip
| Element | C (≤ %) | Si ( %) | Mn ( %) | P (≤ %) | S (≤ %) | Cr (12.5–13.5 %) | Ni (37.5–38.5 %) | Fe (Balance) |
|---|---|---|---|---|---|---|---|---|
| Range | 0.05 | 0.15–0.30 | 0.30–0.60 | 0.020 | 0.020 | 12.5–13.5 | 37.5–38.5 | – |
Mechanical Properties of 1J38 Soft Magnetic Alloy Strip
| Property | Value (MPa / %) |
|---|---|
| Yield Strength | 350–450 MPa |
| Tensile Strength | 500–600 MPa |
| Elongation | 25–35 % |
| Brinell Hardness (HB) | 180–230 HB |
| Density | 8.1–8.5 g/cm³ |
| Modulus of Elasticity | ~200 GPa |
Physical Parameters of 1J38 Soft Magnetic Alloy Strip
| Parameter | Value |
|---|---|
| Density | 8.14 g/cm³ |
| Mean Coefficient of Thermal Expansion (20–400 °C) | 1.0–1.5 × 10⁻⁶ / °C |
| Curie Temperature | 25–200 °C |
| Electrical Resistivity | 0.44 Ω·mm²/m |
| Thermal Conductivity | ~44 W/m·°C |
| Modulus of Elasticity | ~200 GPa |
Standards Compliance for 1J38 Soft Magnetic Alloy Strip
| Standard | Designation & Scope |
|---|---|
| GB/T 15005‑1994 | Cold‑rolled strip for magnetic temperature‑compensation alloy |
| GB/T 32286.1‑2015 | Temperature‑compensation alloy strip specifications |
| GB/T 15018‑1994 | Classification and chemical composition of precision alloys |
Key Features of 1J38 Soft Magnetic Alloy Strip
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High Initial Permeability & Low Coercivity: Ensures efficient magnetic flux control and minimal core losses.
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Tailored Curie Temperature: Designed for precise temperature‑compensation elements in electromagnetic and permanent‑magnetic circuits.
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Near‑Zero Thermal Expansion: Maintains dimensional stability across –50 °C to +150 °C.
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Optimized Electrical Resistivity & Thermal Conductivity: Reduces eddy‑current losses and improves heat dissipation in high‑frequency applications.
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Superior Mechanical Strength: Tensile up to 600 MPa and elongation > 25% for reliable stamping and forming.
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Excellent Corrosion Resistance: Stable in moisture, saline, and hydrazine environments.
Applications of 1J38 Soft Magnetic Alloy Strip
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Temperature‑Compensation Coils in electromagnetic and permanent‑magnetic circuits
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Magnetic Shunt & Divider Elements for precision meters and sensors
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Magnetic Shielding in medical imaging and electronic enclosures
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Compensation & Balance Coils in power transformers and inductors
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Precision Relays, Chokes & Pulse Transformers in automotive and aerospace control systems
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Sensors & Transducers for communication, metering, and instrumentation
FAQ: 1J38 Soft Magnetic Alloy Strip
Q1: What are the standard strip dimensions for 1J38?
A1: Typical thicknesses range from 0.05 mm to 2.0 mm, widths from 10 mm to 200 mm. Custom sizes are available upon request.
Q2: How is 1J38 strip heat‑treated to optimize magnetic properties?
A2: Annealing at 850–950 °C in a hydrogen or vacuum furnace, followed by controlled cooling, refines grain structure and maximizes permeability.
Q3: Which environments can 1J38 withstand?
A3: Resistant to corrosion in high‑humidity, saline, and hydrazine atmospheres; stable magnetic performance from –50 °C to +150 °C.
Q4: How should 1J38 strip be packaged for shipment?
A4: Wrapped in moisture‑proof paper, sealed in anti‑corrosion film, and secured on wooden pallets to prevent deformation and oxidation.
Q5: What industries benefit most from 1J38 strip?
A5: Power generation, electronics, automotive, aerospace, medical devices, and precision instrumentation leverage its stability and performance.
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