Precision Alloys

Precision alloys are metal materials with special physical properties (such as magnetism, electricity, expansion, resistivity, etc.). Precision alloys play an indispensable role and can be used in industry such as electronic and electrical, consumer electronics, precision instruments, communication, sealing, sensor, aviation, energy power and others.
Typical products include soft magnetic alloys (1J21, 1J22, 1J27, 1J50, 1J79, 1J85), half-soft magnetic alloys (2J4, 2J85), elastic alloys (3J21, 3J33, 3J53), expansion alloys (4J29, 4J36, 4J42, 4J50), electric-resistance alloys (6J22, 6J23) etc.
The product form include strip, plate, bar, wire, ring, etc. The minimum thickness of strip is 0.005mm, the maximum width is 450mm, and the tolerance can reach ±0.5μm.

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Technical information

Features
Typical Applications
Technical Specifications

Features

Features are as below:

• Excellent physical properties;

• Accurate chemical composition, low inclusion, high purity;

• High dimensional accuracy, good shape and flatness, excellent surface quality;

• The weight of strip can reach up to 2800kg.

Typical Applications

Typical applications are as below:

• Electronic and electrical products: inductor core, choke core, sensor, transformer, solenoid valve and magnetic shield, spring etc.;

• Consumer electronics: screen and shield for mobile consumer products, connectors for electronic devices and wireless headsets, components for 5G base station, etc.;

• Automatic control: signal amplifier, sensor, switch;

• Precision instrument: pressure sensitive diaphragm;

• Communication: optical fiber connector, cable shield.

Technical Specifications

Precision Alloys Typical Products
Alloy Type	Brand	Equivalent Brand	Cold Strip	Cold Wire	Rolled Bar
Soft magnetic alloys	1J21	Hiperco 50	√
	1J27	Hiperco 27	√
	1J22	Hiperco 50	√		√
	1J50		√		√
	1J51		√
	1J79	Permalloy	√	√	√
	1J85	Super-permalloy	√	√	√
	1J116				√
	1J117				√
Half-soft magnetic alloy	2J4		√
Half-soft magnetic alloy	2J85		√	√	√
Elastic alloys	3J1		√	√
	3J9		√	√	√
	3J21		√	√
	3J33		√		√
	3J53			√
	3J78		√	√	√
Expansion alloys	4J29	Covar	√	√	√
	4J33		√		√
	4J36	Invar	√	√	√
	4J42		√	√	√
	4J50		√	√	√
Resistance alloys	6J10		√	√
	6J12		√
	6J20		√	√	√
	6J22	Karma	√
	6J23	Evanohm	√
	6J40	Constantan	√
High resistance alloys for electrical heating	Cr20Ni80		√
	Cr20Ni35		√
	Cr20Ni30		√

Precision Alloys Specification
Prodect Type	Thickness/mm	Width/mm	Length/mm	Remark
Hot-rolled Plate	6-100	100-400	100-3000
Hot-rolled Strip	3-6	100-450	100-25000
Bar	Φ10-Φ150	—	100-4000
Cold-rolled Plate	0.9-3.0	300-1000	100-3000
Cold-rolled Strip	0.1-2.0	200-450		Coil
Cold-rolled Thin Strip	0.03-0.1	200-450		Coil
Foil	0.005-0.03	≤100		Coil
Wire Rod	Φ3-Φ10	—		Coil