1J50 Soft Magnetic Alloy Strip (Alloy 4750 / UNS K94800) : High Saturation Flux and Low Core Loss
1J50 Strip Description
1J50 Soft Magnetic Alloy Strip combines approximately 48 % nickel with a balanced iron matrix to deliver one of the highest saturation flux densities—around 1.6 Tesla—among nickel‑iron grades, while maintaining exceptional permeability and minimal core loss. In diverse environments—from South Asia’s humid electronics hubs to Europe’s precision instrumentation and North America’s power grids—its low coercivity and high resistivity ensure stable magnetic performance up to 450 °C (Curie point). With tensile strength around 655 MPa and elongation near 25 %, 1J50 Strip supports fine stamping and intricate geometries without sacrificing magnetic properties. Fully compliant with AMS 7718, MIL‑N‑14411 (Comp 3 & Comp 4 for thin strip), ASTM A753 Alloy 2, and IEC 404‑8‑6 Class E3, it offers design engineers a reliable, repeatable solution for transformers, inductors, relays, and shielding applications worldwide.
1J50 Strip Technical Specifications
Chemical Composition
Mechanical Performance
Physical Parameters
Execution Standards
1J50 Strip Applications
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Transformer & Inductor Cores: Laminated cores for power, signal, and audio transformers
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Chokes & Magnetic Amplifiers: Precision coils in telecom and power‑conditioning systems
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Pulse Transformers & Sensors: High‑frequency pulse shaping in aerospace and industrial controls
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Magnetic Shielding: Enclosures and RF shields in medical, data‑center, and instrumentation equipment
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Relay Armatures & Solenoids: High‑sensitivity magnetic elements in automotive and industrial relays
1J50 Strip Key Selling Points
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Superior Saturation Flux Density: Up to 1.6 Tesla for compact, high‑power designs
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Low Core Loss & High Permeability: Minimizes energy dissipation in high‑frequency operation
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Robust Mechanical Strength: 655 MPa tensile strength with 25 % elongation for precision forming
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Thermal Reliability to 450 °C: Stable magnetic performance across harsh climates
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Global Standards Compliance: Meets AMS 7718, MIL‑N‑14411, ASTM A753, IEC 404‑8‑6 for seamless integration
1J50 Strip FAQs
Q1: What is the typical chemical composition of 1J50 Strip?
A: It features 47.0–50.0 % nickel, with carbon ≤ 0.035 %, manganese ≤ 0.80 %, silicon ≤ 0.50 %, phosphorus ≤ 0.02 %, sulfur ≤ 0.008 %, and the remainder iron.
Q2: What mechanical properties does 1J50 Strip exhibit?
A: In the as‑cold‑drawn state, it offers tensile strength ~655 MPa, yield strength ~552 MPa, elongation ~25 %, and Rockwell B hardness ~98 Rb.
Q3: What physical characteristics define 1J50 Strip?
A: It has a density of 8.17 g/cm³, melting point of 1,427 °C, Curie temperature of 450 °C, and resistivity of 49 µΩ·cm.
Q4: Which standards govern 1J50 Strip production?
A: It’s produced to AMS 7718; MIL‑N‑14411 Comp 3 (all forms) and Comp 4 (strip); ASTM A753 Alloy 2; and IEC 404‑8‑6 Class E3 specifications.
Q5: What are the primary applications of 1J50 Strip?
A: Commonly used in transformer and inductor cores, chokes, pulse transformers, magnetic shielding, and relay armatures across telecommunications, power electronics, automotive, and medical sectors.
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1J50 Soft Magnetic Alloy Strip 4750 UNS K94800 High Saturation Flux Images
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