Alloy42 Bar Diameter 70mm Ready Stock

Alloy 42 is a nickel-iron alloy commonly used for its thermal expansion properties, making it ideal for applications requiring compatibility with materials like glass and ceramics. Alloy 42 rods are a specific form of this material, offering versatility in machining and structural applications.

Chemical Composition

• Nickel (Ni): ~42%

• Iron (Fe): Balance

• Carbon (C): ≤ 0.05%

• Manganese (Mn): ≤ 0.80%

• Silicon (Si): ≤ 0.30%

• Sulfur (S): ≤ 0.025%

• Phosphorus (P): ≤ 0.025%

Physical Properties

• Density: ~8.12 g/cm³

• Melting Point: ~1450°C (2642°F)

• Thermal Expansion Coefficient: ~4.9 × 10⁻⁶/°C (room temperature to 300°C)

• Electrical Resistivity: ~0.6 µΩ·m at 20°C

• Magnetic Properties: Moderate magnetic permeability, dependent on composition and processing.

Mechanical Properties

• Tensile Strength: ~480–590 MPa

• Yield Strength: ~310–350 MPa

• Elongation: ~20–30% (varies with processing)

• Hardness: ~HB 140–170 (depending on heat treatment)

Key Characteristics

1. Low Thermal Expansion: Matches the expansion rates of certain glasses and ceramics, making it ideal for sealing and electronic applications.

2. Good Machinability: Can be machined to precise tolerances, making it suitable for custom components.

3. Corrosion Resistance: Resists oxidation and corrosion under typical atmospheric conditions.

4. Weldability: Can be welded using conventional techniques, ensuring ease of fabrication.

Applications

1. Electronics:

• Used in lead frames, connectors, and headers for semiconductors.

• Ideal for hermetic sealing with glass or ceramic.

2. Aerospace and Defense:

• Components in precision instruments requiring thermal stability.

3. Optical Devices:

• Frames and supports for precision optical systems.

4. Medical Devices:

• Used in components requiring stable dimensions across temperature variations.

5. Industrial Equipment:

• Applications in cryogenics and high-vacuum systems.

6. Power Generation:

• Sealing components for electrical transformers and vacuum tubes.

Advantages

• Superior dimensional stability across a wide temperature range.

• Excellent compatibility with other materials like glass and ceramics.

• Versatile and easy to fabricate into various forms, including rods, sheets, and wires.

Available Forms

Alloy 42 is available as rods, sheets, wires, and custom profiles. Rods are typically supplied in diameters ranging from a few millimeters to several centimeters, depending on the application.