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4j78 Iron Nickel Alloy Bar – Premium Iron Bar from a Leading China Manufacturer
The 4j78 Iron Nickel Alloy Bar is a premium material designed for precise industrial applications requiring highly controlled thermal expansion properties. Renowned for its unparalleled stability and durability, this alloy finds its use in various critical sectors, such as electronics, aerospace, and engineering, making it a favored choice among industrial buyers worldwide. With superior corrosion resistance and excellent mechanical characteristics, it is a versatile and cost-effective solution for demanding environments.
Price: Contact Us for a Custom Quote
For pricing information and to obtain a quote on the 4j78 Iron Nickel Alloy Bar, please contact us. Pricing terms are based on product specifications such as size, quantity, and surface treatment.
Specifications
- Diameter: 5mm to 120mm
- Length: Up to 4000mm
- Surface Treatment: Polished, pickled, or sandblasted
- Tolerance: ±0.05mm
- Density: 8.1 g/cm³
- Melting Point: ~1430°C (iron nickel alloy melting point)
Key Features (Advantages)
- High magnetic permeability for sensitive applications
- Low thermal expansion for dimensional stability
- Excellent corrosion resistance in various environments
- Superior machinability and weldability
- Reliable performance in high-precision settings
Applications
The 4J78 Iron Nickel Alloy Bar is used in:
- Electronics: Magnetic shielding, relays
- Aerospace: Precision components, satellite parts
- Telecommunications: Glass-to-metal seals
- Instrumentation: Measuring devices, optical systems
- Energy: Transformer cores, inductors
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Nickel (Ni) | 77.5 -78.5 |
| lron (Fe) | Balance(~20%) |
| Manganese (Mn) | ≤0.3 |
| Silicon (Si) | ≤0.3 |
| Carbon (C) | ≤0.05 |
| Phosphorus (P) | ≤0.02 |
| Sulfur (S) | ≤0.02 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 500-600 MPa |
| Yield Strength | 250-320 MPa |
| Elongation | ≥25% |
| Hardness | 130-150 HV |
| Modulus of Elasticity | 140 GPa |
Chemical Properties
- Acid Resistance: Good resistance to dilute sulfuric and hydrochloric acids.
- Alkali Resistance: Excellent performance in alkaline solutions like sodium hydroxide.
- Environmental Limitations: Susceptible to pitting corrosion in high-chloride environments, such as concentrated seawater.
Things to Note (Limitations)
- Avoid exposure to temperatures above 600°C to maintain magnetic properties.
- Not suitable for highly acidic or chloride-rich environments due to pitting risks.
- Requires careful annealing to preserve low thermal expansion properties.
Corrosion Data for 4j78 Iron Nickel Alloy Bar
| Environment | Corrosion Rate (mm/year) | Notes |
|---|---|---|
| Atmospheric | <0.01 | Excellent rust resistance |
| Mild Acidic | 0.03-0.06 | Good in dilute acids |
| Alkaline | <0.01 | Highly resistant to alkalis |
| Seawater | 0.15-0.35 | Moderate, pitting risk in high chloride |
Contact us for detailed corrosion resistance data specific to your application.
Best Welding and Manufacturing Practices
- Welding Methods: TIG, MIG, and resistance welding recommended for 4J78 Iron Nickel Alloy Bar.
- Techniques: Use low heat input to prevent distortion; preheating not typically needed.
- Forming: Easily machined and formed using standard alloy steel methods.
- Post-Weld Treatment: Anneal at 550-650°C to reduce stress and maintain properties.
What Customers Say About Our 4j78 Iron Bar
Frequently Asked Questions
Q: What sets the 4j78 Iron Nickel Alloy Bar apart from similar materials?
A: Its low thermal expansion and dimensional stability make it ideal for specialized industrial applications.
Q: Can the 4j78 alloy be customized to specific dimensions?
A: Yes, custom sizes and treatments are available to meet precise requirements.
Q: What industries benefit most from this material?
A: Aerospace, electronics, and industrial machinery are primary users.
Q: How does the alloy perform under extreme conditions?
A: It maintains excellent stability at low and moderate temperatures but may require surface treatments for extreme environments.
Q: What is the melting point of this alloy?
A: Approximate melting point is 1420°F (770°C).