High-Saturation Iron-Cobalt-Vacuum Soft Magnetic Alloy Rod

‌Ultra-high saturation magnetic induction (2.4T): Enables compact motor/electromagnet designs.
‌High Curie point (980℃): Maintains magnetic stability at elevated temperatures.
‌High magnetostriction coefficient (60-100×10⁻⁶): Ideal for energy-efficient transducers.
‌Limitations: Low resistivity (0.27μΩ·m) restricts high-frequency use; requires oxidation-resistant coatings.

Chemical Composition (wt%)

Parameter	Value Range	Test Standard
Diameter	5-200mm	Customizable
Density	8.2 g/cm³	GB/T 15002-94
Hardness (HB)	200-300 (Forged)	ASTM E10
Tensile Strength	700-900 MPa	ISO 6892-1
Yield Strength	≥550 MPa

Element	Content Range	Role
C	≤0.04%	Impurity control
Si	≤0.30%	Deoxidizer
Mn	≤0.30%	Deoxidizer
P	≤0.025%	Harmful impurity
S	≤0.020%	Harmful impurity
Co	49.0-51.0%	Core alloying element
V	0.80-1.80%	Grain refiner
Fe	Balance	Matrix

1J22 bar is an iron-cobalt-vanadium soft magnetic alloy with a high saturation magnetic flux density. Its exceptional magnetic and mechanical properties play a key role in numerous high-tech applications. The following is a detailed analysis of its performance characteristics and applications:

1. Performance Characteristics

Excellent Magnetic Properties

1J22 alloy boasts a saturation magnetic flux density of up to 2.4 T and a Curie temperature of 980°C, enabling it to maintain stable magnetic properties even in high-temperature environments. Its initial magnetic permeability exceeds 3,000 and its maximum permeability reaches over 20,000. Its low coercivity and minimal hysteresis losses make it particularly suitable for the manufacture of high-efficiency electromagnetic devices. Furthermore, its high magnetostriction coefficient (60 to 100 × 10-6) makes it suitable for high-energy output magnetostrictive transducers.

Excellent Mechanical Properties

1J22 bar boasts a tensile strength of 500-700 MPa, a yield strength of 300-450 MPa, and an elongation of 20%-30%, demonstrating both high strength and ductility. Its elastic modulus is approximately 110 GPa, its shear strength is approximately 280 MPa, and its yield strength is in the range of 340-370 MPa, giving it excellent deformation and compressive resistance under load. However, its low resistivity (approximately 0.27 μΩ·m) limits its application in high-frequency environments.

High Temperature Stability

This alloy maintains stable magnetic properties from -60°C to 150°C, and its wide temperature range makes it excellent for extreme environments such as aerospace. However, its yield strength decreases at high temperatures, for example, by approximately 15% at 200°C.

2. Applications

Aerospace

1J22 bar is used in the manufacture of inertial navigation components such as gyroscopes and accelerometers for aircraft, as well as core components for solenoid valves and relays. Its high magnetic induction strength significantly reduces device size, meeting the demand for lightweight aerospace equipment. For example, magnetic torquers using this material in satellite attitude control systems achieve a 60% weight reduction and over 30% performance improvement.

Electronic Communications and Precision Instruments

This material is widely used in high-frequency transformers, magnetic amplifiers, and magnetic shielding components. In 5G base station circulator designs, its low loss characteristics can boost device efficiency to over 95%. It is also used in the manufacture of key components such as high-sensitivity sensors and precision gyroscopes.

Medical and Energy Equipment

1J22 rods are used as the electrode material for magnetic resonance imaging systems. Their stability under high field strengths is directly related to image quality. In the energy sector, they are used to manufacture high-efficiency transformer cores and motor stators. With the development of new energy vehicles, their application prospects in electric vehicle drive motors are promising.