Electroplating Iron Nickel Alloy Co257 Kovar 4j33 Precision Round Steel Expansion Alloy

Name: Electroplating Iron Nickel Alloy Co257 Kovar 4j33 Precision Round Steel Expansion Alloy
Brand: Jiangsu Zhonggongte Metallurgical Technology Co., Ltd.
SKU: Kovar 4J33 round bar
Availability: InStock

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Electroplating Iron Nickel Alloy Co257 Kovar 4j33 Precision Round Steel Expansion Alloy

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Product Details:

Place of Origin:	China
Brand Name:	Zhonggong Special Metallurgy
Certification:	ISO Certificate
Model Number:	Kovar 4J33 round bar

Payment & Shipping Terms:

Minimum Order Quantity:	100KG
Price:	Price is negotiated based on the required specifications and quantity
Packaging Details:	Standard export packaging, or packaging as required
Delivery Time:	5-8 working days, depending on the parameters required for negotiation
Payment Terms:	Payment Terms: Mainly T/T.. L/C, D/A, D/P,
Supply Ability:	5000 tons per month

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Electroplating Iron Nickel Alloy Co257 Kovar 4j33 Precision Round Steel Expansion Alloy

Description

Density:	High	4J33 Alloy Is An:	Iron-nickel-cobalt Alloy
Elastic Modulus:	High	Low:	Resistivity
Elastic Modulus:	Is 139 GPa	Resistivity:	0.46 μΩ·m
The Thermal Expansion Coefficient:	Is About 8.5×10⁻⁶/°C	Good:	Plasticity And Toughness
With:	High Magnetic Permeability And Low Hysteresis Loss
Highlight:	Electroplating Iron Nickel Alloy , Iron Nickel Alloy Co257 , Kovar Alloy 4j33

Electroplating Iron Nickel Alloy Co257 Kovar 4j33 Precision Round Steel Expansion Alloy

Product Attributes

Attribute	Value
Density	High
Alloy Type	Iron-nickel-cobalt alloy
Elastic Modulus	139 GPa
Resistivity	0.46 μΩ·m
Thermal Expansion Coefficient	8.5×10⁻⁶/°C
Mechanical Properties	Good plasticity and toughness
Magnetic Properties	High magnetic permeability and low hysteresis loss

Product Description

Kovar 4J33 round bar Co257 round steel expansion alloy light bar iron nickel alloy bar.

Chemical Composition

The main chemical components of 4J33 alloy include iron (Fe), nickel (Ni), cobalt (Co) and a small amount of other elements:

Element	Percentage
Nickel (Ni)	32.1%-33.6%
Cobalt (Co)	14.0%-15.2%
Iron (Fe)	Balance
Carbon (C)	≤0.05%
Phosphorus (P)	≤0.02%
Sulfur (S)	≤0.02%
Manganese (Mn)	≤0.50%
Silicon (Si)	≤0.30%

These components give 4J33 alloy its low thermal expansion coefficient and excellent mechanical properties, making it ideal for manufacturing electron tubes, magnetron electrodes, and ceramic seals.

Physical Properties

Density: 8.27g/cm³
Melting point: 1450℃
Thermal conductivity: 17.6W/m•℃ (at 100℃)
Elastic modulus: 139GPa
Thermal expansion coefficient: α (20~100℃) = (4~11)×10^-6℃-1

Mechanical Properties

Tensile strength: 539MPa
Yield strength: 343MPa
Elongation: 32%
High elastic modulus with good plasticity and toughness

Magnetic Properties

Features high magnetic permeability and low hysteresis loss, making it ideal for precision magnetic equipment. Its extremely low magnetostriction coefficient ensures minimal size changes under magnetic fields.

Corrosion Resistance

Contains Cr and Mo elements that provide excellent corrosion resistance, maintaining structural integrity in various environments.

Processing and Welding Properties

Excellent machinability for cutting, bending, and drilling. Can be welded to copper, steel, nickel and other metals. Good electroplating properties allow surface plating with gold, silver, nickel, and chromium.

Application Fields

Electronics: Electron tubes, magnetron electrodes, ceramic seals
Aerospace: Electrodes, lead plates, sealing structures
Instrumentation: Magnetic sensors, magnetometers
Other: High-frequency equipment, navigators, aviation instruments

4J33 (Kovar alloy) plays a vital role in materials science and industrial technology with its unique properties and broad applications.

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Contact Person: John zhou

Tel: +8613306184668

Fax: 86-510-88232386

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