Iron Nickel Cobalt Alloy ASTM F15 Kovar Round Bar 4J36 FeNi Rods
Precision alloys are metal materials with special physical properties (such as magnetic, electrical, thermal and other properties). The vast majority of precision alloys are based on ferrous metals, and only a few are based on non-ferrous metals. Usually include magnetic alloys (see magnetic materials), elastic alloys, expansion alloys, thermal bimetals, electrical alloys, hydrogen storage alloys (see hydrogen storage materials), shape memory alloys, magnetostrictive alloys (see magnetostrictive materials), etc.
| Property | Value |
| Alloy Grade | 4J36 (Equivalent to Invar 36) |
| Chemical Composition | Ni: 36% ±0.5%, Fe: Balance |
| CTE (20–100°C) | ~1.2 × 10⁻⁶ /°C |
| Density | ~8.1 g/cm³ |
| Tensile Strength | 450–650 MPa (annealed) |
| Yield Strength | ≥ 240 MPa |
| Elongation | ≥ 30% |
| Melting Point | ~1425°C |
| Electrical Resistivity | ~0.78 μΩ·m |
| Wire Diameter Range | 0.02 mm – 3.0 mm (customizable) |
| Condition | Soft Annealed / Bright / Oxidized / Bare |
| Packaging | Spools, coils, or custom on request |
