Description
Overview Of Super-Invar
Super-Invar, also known as Super-Invar alloy, is a unique metallic material with exceptional physical and chemical properties. This article provides a comprehensive overview of Super-Invar.
Powder Chemical Composition(wt,-%)
| Carbon (C) | ≤0.05% |
| Silicon (Si) | ≤0.20% |
| Phosphorus (P) | ≤0.020% |
| Sulfur (S) | ≤0.020% |
| Copper (Cu) | 0.4-0.8% |
| Manganese (Mn) | 0.2-0.6% |
| Cobalt (Co) | 3.2-4.2% |
| Nickel (Ni) | 31.5-33.0% |
| Iron (Fe) | Balance |
Physical Properties
| Melting Temperature Range | 1430～1450℃ |
| Density | ρ=8.10 g/cm³ |
| Thermal Conductivity | λ=13.9 W/(m·℃) |
| Coefficient of Thermal Expansion | Extremely low within the range of -60～80℃ |
Mechanical Properties
| ensile Strength (σb) | ≥1000 MPa at 20℃ |
| Yield Strength (σs) | ≥850 MPa at 20℃ |
| Elongation (δ5) | ≥10% at 20℃ |
| Reduction of Area (ψ) | ≥50% at 20℃ |
Basic Information
● Material Grade: Super-Invar
● Alias: Super-Invar
● Technical Standard: Compliant with YB/T5241-1993 “Technical Conditions for Low Expansion Alloys 4J32, 4J36, 4J38, and 4J40”
● Chemical Composition:
Manufacturing Process
The production of Super-Invar involves intricate processes such as raw material preparation, melting, casting, forging, and heat treatment. Heat treatment, including solution treatment and aging, is crucial for optimizing the internal structure and physical properties of the alloy.
Development Trends
With the rapid advancement of global technology, especially in precision manufacturing and aerospace, the demand for Super-Invar is steadily increasing. Ongoing technological innovations aim to enhance its strength, toughness, and reduce production costs by improving manufacturing processes and optimizing alloy composition. Special variants with enhanced properties like high-temperature resistance, wear resistance, and high electrical conductivity are also being developed, further expanding its application potential.
Super-Invar plays a vital role in numerous industries due to its unique characteristics and shows significant potential for future development.
Primary Applications
Due to its low thermal expansion, high strength, and excellent corrosion resistance, 4J32 metal powder finds widespread applications in various fields:
● Precision Instrument Manufacturing: Aerospace instruments, gyroscopes, etc.
● Electronic Communications: High-precision electronic components and magnetic components like inductors and transformers.
● Optical Instruments: Key components ensuring high precision and stability under temperature variations.
● Medical Devices: Used in the fabrication of high-precision and stable medical equipment.
● Energy Sector: Components for nuclear reactor control rods.
