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Help CenterLow Thermal Expansion Invar Alloy 4J36 Bright Round Bar Precision Nickel Iron Alloy Rod Customized Size
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Low Thermal Expansion Invar Alloy 4J36 Bright Round Bar Precision Nickel Iron Alloy Rod Customized Size
4J36 Invar Alloy Bright Round Bar Product Description
Product Overview
4J36 (Invar 36) is a Fe-Ni precision alloy containing approximately 36% nickel. It is known for its extremely low coefficient of thermal expansion at room temperature, making it an ideal material for applications requiring high dimensional stability and precision.
The alloy offers excellent mechanical properties, good machinability, and stable performance under varying temperature conditions. It is widely used in aerospace, electronics, optical instruments, measuring devices, semiconductor equipment, and scientific research applications.
Product Features
Ultra-Low Thermal Expansion
4J36 exhibits an exceptionally low thermal expansion coefficient, ensuring outstanding dimensional stability over a wide temperature range.
Excellent Dimensional Stability
Maintains precise dimensions and tolerances under temperature fluctuations, suitable for precision engineering applications.
Good Machinability
Can be processed by turning, milling, drilling, grinding, and precision machining operations.
Stable Mechanical Properties
Provides reliable strength, toughness, and structural stability.
Precision Surface Finish
Available with bright finish, peeled finish, ground finish, or polished surface according to customer requirements.
Custom Manufacturing
Supports customized diameters, lengths, tolerances, and special surface treatments.
Chemical Composition (%)
| Element | Content |
|---|---|
| Nickel (Ni) | 35.0–37.0 |
| Iron (Fe) | Balance |
| Carbon (C) | ≤0.05 |
| Silicon (Si) | ≤0.30 |
| Manganese (Mn) | ≤0.60 |
| Sulfur (S) | ≤0.02 |
| Phosphorus (P) | ≤0.02 |
Available Specifications
Product Form
Bright Round Bar
Ground Bar
Peeled Bar
Forged Bar
Cold Drawn Bar
Diameter Range
3 mm – 300 mm
Custom sizes available
Length
1000 mm – 6000 mm
Customized lengths accepted
Surface Finish
Bright
Polished
Ground
Peeled
Tolerance
h9
h11
Custom tolerance available
Physical Properties
| Property | Value |
|---|---|
| Density | 8.1 g/cm³ |
| Melting Range | 1430–1450°C |
| Thermal Expansion Coefficient | Approx. 1.2 × 10⁻⁶ /°C (20–100°C) |
| Magnetic Property | Ferromagnetic |
Applications
Aerospace Components
Optical Instruments
Semiconductor Equipment
Precision Measuring Instruments
Laser Equipment
Scientific Research Devices
Cryogenic Engineering
Electronic Packaging
Mold Components
Precision Machinery Parts
Quality Assurance
100% Material Identification
Chemical Composition Testing
Mechanical Property Testing
Dimension Inspection
Surface Quality Inspection
Material Test Certificate (EN 10204 3.1) Available
Packaging
Waterproof Packaging
Wooden Cases
Export Standard Seaworthy Packing
Customized Packaging Available
Send Inquiry to This Supplier
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