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4j36 Low Expansion Alloy Plate Invar 36 Round Bar For Precision Instrument Components
| MOQ: | 100KG |
| Price: | Price is negotiated based on the required specifications and quantity |
| Standard Packaging: | Standard export packaging, or packaging as required |
| Delivery Period: | 5-8 working days, depending on the parameters required for negotiation |
| Payment Method: | Payment Terms: Mainly T/T.. L/C, D/A, D/P, |
| Supply Capacity: | 5000 tons per month |
4j36 Low Expansion Alloy
,4j36 Invar 36 Round Bar
,Precision Invar 36 Round Bar
| Density | 8.1 g/cm³ |
| Alloy Type | Iron nickel alloy with ultra-low coefficient of expansion |
| Tensile Strength | 490-680 MPa |
| Yield Strength | ≥ 240 MPa |
| Hardness (Annealed) | 130 to 180 HB |
| Hardness (Cold Rolled) | 170 to 200 HB |
| Melting Point | 1390 to 1450 °C |
4J36 is a special low expansion iron-nickel alloy with an ultra-low coefficient of expansion, ideal for precision instrument components. The control of carbon and manganese components is critical for maintaining its exceptional properties.
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 35~37.0 |
| Iron (Fe) | Balance |
| Manganese (Mn) | 0.2~0.6 |
| Carbon (C) | ≤0.05 |
| Silicon (Si) | ≤0.3 |
| Phosphorus (P) | ≤0.02 |
| Sulfur (S) | ≤0.02 |
- Low expansion coefficient: Average linear expansion coefficient of ~1.2 x 10^-6 /°C (-100°C to 200°C)
- Thermal conductivity: 11 W/(m*℃)
- Electrical resistivity: 0.78 Ωmm²/m at 20℃
- Elastic modulus: 144 GPa
- Curie point: 230℃
- Excellent dimensional stability under temperature variations
- Superior thermal and electrical conductivity
- Good magnetic properties for sensors and actuators
- High strength with tensile strength of 490-680 MPa
- Good elongation (25%-35%) and processing characteristics
- Electronic packaging (IC packaging, vacuum tube shells)
- Precision instruments (sensors, standard gauges)
- Aerospace components (engine parts, missile components)
- Automotive and optoelectronic devices
While corrosion-resistant in dry air, 4J36 requires protective coatings in humid environments. It offers excellent weldability using various methods including TIG, MIG, and plasma welding, with no pre/post weld heat treatment needed.
4J36 alloy's unique combination of low thermal expansion, high strength, and excellent processing characteristics makes it indispensable for aerospace, electronics, and precision instrumentation applications. Its performance continues to drive innovation in advanced manufacturing sectors.
