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Alloy 52 Strip (UNS N14052)

Alloy 52 is a nickel-iron alloy containing approximately 50.5% nickel. It is specifically designed for glass-to-metal sealing applications requiring highly consistent thermal expansion characteristics over a broad temperature range.

Why Is Alloy 52 Used for Glass Sealing Applications?

Alloy 52 exhibits highly stable thermal expansion up to 1049°F (565°C), making it particularly suitable for sealing specialized soft glasses used in high-reliability electronic and hermetic systems.

What Is the Chemical Composition of Alloy 52?


Element Composition
Nickel (Ni) 50.5%
Manganese (Mn) 0.2%
Carbon (C) 0.005%
Iron (Fe) Balance

What Are the Physical and Mechanical Properties of Alloy 52?

Property Value
Density 0.300 lb/in3
Specific Gravity 8.30
Tensile Strength 72,000 psi
Yield Strength 36,000 psi
Elongation 35%
Hardness 120-130 HV
Elastic Modulus 24 × 106 psi

What Are the Thermal Expansion Properties of Alloy 52?


Temperature Range Thermal Expansion
30-450°C / 86-842°F 9.7-10.2 × 10-6 m/m/°C
30-550°C / 86-1022°F 10.0-10.5 × 10-6 m/m/°C

Where Is Alloy 52 Commonly Used?

  • Glass-to-metal seals
  • Electronic packages
  • Electrical feedthroughs
  • Sensors
  • Hermetic enclosures
  • High-reliability electronics

Alloy 52 provides thermal expansion characteristics that closely match specialized soft glasses used in hermetic electronic packaging.

Alloy 52 maintains highly consistent thermal expansion characteristics up to approximately 1049°F (565°C).

Alloy 52 is commonly used in electronics, sensors, electrical feedthroughs, hermetic packages, and other high-reliability sealing applications.
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