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4j29 Iron Nickel Alloy Pipe – Reliable Iron Nickel Alloy Manufacturer in China
The 4j29 Iron Nickel Alloy Pipe, also known as Invar material, is a precision-engineered nickel-iron alloy renowned for its low thermal expansion and exceptional dimensional stability. Manufactured in China, this alloy pipe is ideal for applications requiring high precision and resistance to environmental changes. Its unique nickel iron alloy properties make it a top choice for industries like aerospace, electronics, and scientific instrumentation.
Price: Contact Us for a Custom Quote
For pricing information regarding the 4j29 Iron Nickel Alloy Pipe, please reach out to us directly to receive a customized quote. Pricing terms and conditions can vary depending on specifications and order volumes.
Specifications
- Outer Diameter: 10mm – 200mm
- Wall Thickness: 0.5mm – 20mm
- Length: Customizable, up to 6m
- Surface Treatment: Polished, pickled, or annealed
- Standards: ASTM, GB, JIS
- Grades: 4j29 (Invar 36 equivalent)
Key Features (Advantages)
- Low Thermal Expansion: Maintains shape across temperature changes.
- High Corrosion Resistance: Durable in harsh environments.
- Excellent Machinability: Easy to form into Invar rod or bar.
- Superior Dimensional Stability: Ideal for precision instruments.
- Non-Magnetic: Suitable for sensitive electronic applications.
Applications
The 4j29 Iron Nickel Alloy Pipe is widely used across industries:
- Aerospace: Structural components, satellite frameworks.
- Electronics: Semiconductor manufacturing, circuit board supports.
- Scientific Instruments: Telescopes, laser systems, and precision optics.
- Energy: Gas and oil pipelines requiring corrosion resistance.
- Medical: Imaging equipment and surgical tools.
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Nickel (Ni) | 35.0-37.0 |
| lron (Fe) | Balance |
| Manganese (Mn) | ≤0.5 |
| Silicon (Si) | ≤ 0.3 |
| Carbon (C) | ≤ 0.05 |
| Sulfur (S) | ≤ 0.02 |
| Phosphorus (P) | ≤ 0.02 |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 450-550 MPa |
| Yield Strength | 240-300 MPa |
| Elongation | ≥30% |
| Hardness (HB) | 120-150 |
| Density | 8.1 g/cm³ |
| lron Nickel Alloy Melting Point | 1427°C |
Chemical Properties
- Acid Resistance: Good resistance to dilute acids; avoid prolonged exposure to strong acids like hydrochloric.
- Alkali Resistance: Excellent resistance to alkalis, suitable for caustic environments.
- Environmental Limitations: Avoid highly oxidizing conditions or prolonged exposure to sulfur-rich atmospheres.
Things to Note (Limitations)
- High-Temperature Limits: Loses dimensional stability above 300°C.
- Oxidizing Environments: Susceptible to corrosion in strong oxidizing agents.
- Mechanical Stress: Avoid excessive cold working to prevent work hardening.
Corrosion Data for 4j29 Iron Nickel Alloy Pipe
| Environment | Corrosion Rate (mm/year) |
|---|---|
| Atmospheric (Rural) | <0.01 |
| Atmospheric (Marine) | 0.01-0.03 |
| Mild Chemical (pH 5-9) | <0.02 |
| Dilute Acid (10% H₂SO₄) | 0.05-0.1 |
Contact us for detailed corrosion resistance data specific to your application.
Best Welding and Manufacturing Practices
For welding, the 4j29 Iron Nickel Alloy Pipe is compatible with TIG and MIG welding techniques. It supports conventional machining and forming processes, making it versatile for various fabrication needs. Preheating and post-weld heat treatment are recommended to ensure optimal performance.
What Customers Say About Our 4j29 Iron Pipe
Frequently Asked Questions
Q:What are the primary uses of the 4j29 Iron Nickel Alloy Pipe?
A: Its primary uses include housing and sealing in electronics, aerospace components, and precision medical device manufacturing.
Q: How does this material differ from other iron-nickel alloys?
A: The 4j29 alloy features a specific nickel-iron balance that ensures low thermal expansion, making it ideal for high-precision applications.
Q: Can 4j29 be used in highly corrosive environments?
A: It holds up well in mild corrosive environments but is not recommended for use in highly acidic or harsh chemicals without protective measures.
Q:What is the thermal expansion rate of the alloy?
A: The thermal expansion rate is approximately 9.2 x 10⁻⁶/°C between 20°C and 200°C, ensuring stability over temperature variations.
Q: How do I order custom specifications for the pipe?
A: Please contact us directly with your specific requirements, and our team will assist you in customizing the product to meet your needs.