3j21 Wire Super Elastic Alloy Wire For Spring Precision Wire Support Customized Service

Price Negotiable

Price: Negotiate

MOQ: 3KG

Delivery Time: Normally 7-10 days if in stock

Brand: HUONA

Product Description

3j21 Wire Super Elastic Alloy Wire For Spring Precision Wire Support Customized Service

3J21 wire is made of 3J21 alloy, which is a cobalt - based precipitation - hardening high - elastic alloy. It is widely used in aerospace, precision instruments, medical devices and other fields due to its excellent performance.

Chemical Composition

According to ASTM F1058 standard, the chemical composition of 3J21 is as follows:

Element	Content (%)
Co	39 - 41
Cr	19 - 21
Ni	14 - 16
Mo	6.5 - 7.5
Mn	1.7 - 2.3
C	0.07 - 0.12
Be	0.01
Fe	Bal.
Si	0.6
P	≤0.015
S	≤0.015

Physical Properties

The physical properties of 3J21 wire are shown in the following table:

Property	Value
Density (g/cm³)	8.4
Resistivity (μΩ·m)	0.92
Elastic Modulus (E/MPa)	196000 - 215500
Shear Modulus (G/MPa)	73500 - 83500
Magnetic Susceptibility (K/10⁶)	50 - 1000
Melting Point (℃)	1372 - 1405

Product Features

High Elasticity
Excellent Fatigue Resistance
Good Corrosion Resistance
Non - magnetic
High - temperature Resistance

Application Fields

Aerospace: Used for key springs of engines, diaphragms, precision fasteners, sensor elements, etc.
High - end Instruments and Meters: Applicable to tension wires, hairsprings, diaphragms, bellows, precision springs, etc.
Medical Devices: Used for elastic components of surgical instruments and components of implanted devices.
Precision Machinery and Electronics: Suitable for relay contact springs, connectors, support parts of optical devices, etc.
Energy and Petrochemical: Used for special valve springs and elastic parts of down - hole tools.

Product Specifications

The diameter of 3J21 wire usually ranges from 0.05mm to 6.0mm.
Different diameter specifications are suitable for making different components,
such as small - scale precision springs and sensor elements.

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