1J50 Soft Magnetic Nickel-Iron Precision Alloy

Short Description:

1J50 Soft Magnetic Alloy Overview 1J50 is an iron-nickel soft magnetic precision alloy associated with relatively high permeability and relatively high saturation magnetic induction. Compared with higher-nickel grades such as 1J79 and 1J85, it is selected when the design requires a different balance of permeability, saturation behavior, component geometry and cost. Final magnetic properties depend strongly on product dimensions, cold work, stamping or forming stress,…

Grade:: 1J50 Soft Magnetic Nickel-Iron Precision Alloy
Standard:: ASTM A753
Surface:: Mill finish, pickled, polished, or as required
Diameter:: Not applicable

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1J50 Soft Magnetic Alloy Overview

1J50 is an iron-nickel soft magnetic precision alloy associated with relatively high permeability and relatively high saturation magnetic induction. Compared with higher-nickel grades such as 1J79 and 1J85, it is selected when the design requires a different balance of permeability, saturation behavior, component geometry and cost.

Final magnetic properties depend strongly on product dimensions, cold work, stamping or forming stress, component shape and the final magnetic annealing cycle. Chemistry alone does not guarantee finished-part performance; the required magnetic parameter and test method should be agreed before production.

1J50 Product Specification

Item	Supply Reference
Grade	1J50
Alloy family	Nickel-iron soft magnetic precision alloy
Performance positioning	Relatively high permeability with relatively high saturation magnetic induction
General requirements reference	GB/T 14986.1-2025; the specific product and magnetic acceptance specification must be confirmed with the inquiry
Typical supply forms	Cold-rolled strip, wire, tube, hot-rolled flat / rod, bar and customer-specified components
Order basis	Dimensions, tolerances, supply condition, magnetic properties, test method and certification

Supply Forms and Custom Processing

Supply Form	Production Review Information
Cold-rolled strip	Thickness, width, tolerance, coil ID, coil weight, surface and edge condition
Wire and rod	Diameter, tolerance, straightness, coil or cut length and surface condition
Tube and flat products	Outside diameter or section size, wall thickness, tolerances and delivery condition
Stamped or machined parts	Drawing, burr direction, machining allowance, joining and final magnetic annealing sequence

1J50 Technical Data and Grade Comparison

The original composition data are retained below as a comparison between 1J50, 1J79 and 1J85. The highlighted row is the target grade for this page. Values are reference information; final acceptance follows the ordered specification and material certificate.

Grade	C	S	P	Mn	Si	Ni	Mo	Cu	Fe
1J50	≤0.03	≤0.02	≤0.02	0.3–0.6	0.15–0.3	49–50.5	—	≤0.2	Balance
1J79	≤0.03	≤0.02	≤0.02	0.6–1.1	0.3–0.5	78.5–80	3.8–4.1	≤0.2	Balance
1J85	≤0.03	≤0.02	≤0.02	0.3–0.6	0.15–0.3	79–81	4.8–5.2	≤0.2	Balance

Selection Factor	Procurement and Design Note
Saturation requirement	State the required induction and applied field instead of selecting only by grade name
Permeability and coercivity	Specify initial / maximum permeability or coercivity together with the measurement method
Frequency and thickness	Operating frequency and lamination thickness affect eddy-current loss and core response
Final annealing	Annealing temperature, atmosphere, cooling and post-annealing handling affect finished magnetic performance
Component geometry	Gaps, burrs, bends, joints and residual stress can change the effective magnetic circuit

Discuss 1J50 Dimensions and Magnetic Requirements

1J50 Applications

Application Area	Typical Components
Transformers and inductors	Instrument-transformer cores, pulse components, chokes and magnetic circuits
Relays and control equipment	Relay parts, armatures, pole pieces and electromagnetic control components
Sensors and transducers	Flux-guiding parts and magnetic cores for measurement systems
Magnetic shielding	Selected shielding components where the specified field and geometry suit 1J50 performance
Electrical machinery	Laminations and precision magnetic components requiring controlled saturation and loss

Quality Inspection and Documentation

Inspection Item	Available Review
Material identity	Chemical composition, grade and heat / batch traceability
Dimensions	Thickness or diameter, width, length, flatness, straightness and tolerances
Surface and edges	Inspection for scratches, oxidation, contamination, burrs and edge damage
Magnetic properties	Agreed permeability, coercivity, induction or loss testing under specified conditions
Documents	Inspection certificate, magnetic test results, heat-treatment record, marking and additional documentation as ordered

Packaging and Export Delivery

Strip and laminations	Interleaving, flat stacking or coil protection with edge guards and moisture barrier
Wire, rod and bar	Coils, bundles or cases selected according to dimensions, unit weight and straightness requirements
Annealed components	Protective spacing and rigid packing to reduce bending, impact and residual-stress introduction
Identification	Grade, dimensions, heat / batch number, condition, net weight and order reference

RFQ Confirmation Checklist

Please Provide	Required Detail
Product form	Strip, wire, tube, flat, bar, lamination or finished component
Dimensions	Thickness or diameter, width, length, tolerances and quantity
Supply condition	Cold-worked, intermediate condition or final magnetic annealing requirement
Magnetic acceptance	Required parameter, frequency / field, test method and specimen geometry
Quality and delivery	Certificate, inspection, marking, packing and destination