4j78 Iron Nickel Alloy Tube – China Manufacturer of 4j78 Iron Nickel Alloy Tube

The 4J78 Iron Nickel Alloy Tube, a precision-engineered nickel-iron alloy, offers exceptional thermal stability and corrosion resistance. Known as an Invar material, it is ideal for applications requiring minimal thermal expansion, such as aerospace components and electronic devices. This high-performance alloy, produced by our trusted China manufacturer, ensures reliability in demanding environments.

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For competitive pricing on 4J78 Iron Nickel Alloy Tube, contact our sales team for a personalized quote. Flexible terms available to meet your project needs.

Specifications

Outer Diameter: 6mm to 200mm
Wall Thickness: 0.5mm to 20mm
Length: Up to 60 feet (customizable)
Surface Treatment: Bright annealing, pickled, or polished
Standards: ASTM B163, B167, custom specifications
Forms: Seamless, welded, or coiled tubing

Key Features (Advantages)

Low Thermal Expansion: Maintains dimensional stability across wide temperature ranges.
Corrosion Resistance: Resists oxidation and pitting in harsh environments.
High Strength: Superior mechanical properties for structural integrity.
Customizable: Tailored sizes and finishes from our China factory.
Magnetic Properties: Ideal for applications requiring controlled magnetism.

Applications

The 4J78 Iron Nickel Alloy Tube excels in industries such as:

Aerospace: Precision components like turbine blades and structural parts.
Electronics: Magnetic shielding and glass-to-metal seals.
Industrial Automation: Sensors and actuators requiring thermal stability.
Medical Equipment: MRI components and surgical instruments.
Petrochemical: Piping systems in corrosive environments.

Chemical Composition

Element	Percentage (%)
Nickel (Ni)	35-80
lron (Fe)	20-65
Molybdenum (Mo)	0-5
Copper (Cu)	0-2
Others	Trace

Mechanical Properties

Property	Value
Tensile Strength	550-750 MPa
Yield Strength	200-400 MPa
Elongation	30-40%
Hardness (HV)	80-90 HV10
Density	8.1 g/cm³

Chemical Properties

Acid Resistance: Excellent resistance to sulfuric and phosphoric acids, ideal for chemical processing.
Alkali Resistance: Strong performance in alkaline environments, such as sodium hydroxide solutions.
Environmental Limitations: Less effective in highly reductive or chloride-rich environments, where pitting corrosion may occur.

Things to Note (Limitations)

High-Temperature Limits: Prolonged exposure above 650°C may reduce corrosion resistance.
Chloride Environments: Susceptible to pitting and crevice corrosion with high nickel content.
Work Hardening: Requires careful machining to avoid hardening during fabrication.

Corrosion Data for 4j78 Iron Nickel Alloy Tube

Environment	Corrosion Rate (mm/year)
Atmospheric (Urban)	<0.01
Seawater (Flowing)	0.02-0.05
Sulfuric Acid (10%)	0.01-0.03
Phosphoric Acid (Commercial)	<0.02

Best Welding and Manufacturing Practices

Welding Methods: TIG/MIG with ERNiCrMo-3 filler for optimal results; GTAW for precision welds.
Forming: Easily formed due to ductility; cold working enhances strength.
Processing: Annealing at 870-1180°C followed by air cooling preserves nickel iron alloy properties.
Precautions: Control heat input to prevent cracking; post-weld heat treatment may be required.

What Customers Say About Our 4j78 Iron Tube

Frequently Asked Questions

Q: What makes the 4j78 Iron Nickel Alloy Tube unique?

A: Its high nickel content enhances magnetic and thermal properties, setting it apart from other alloys.

Q: What are common industrial uses?

A: It is used in aerospace, electronics, and as magnetic shielding in various applications.

Q: Can the tube be customized for different sizes?

A: Yes, it can be manufactured to specific dimensions to meet various industrial needs.

Q:How is it resistant to corrosion?

A: Its chemical composition provides resistance against atmospheric and mild chemical exposure.

Q: What is the melting point of the alloy?

A: The approximate melting point is 1400°C, contributing to its impressive thermal resistance.