Alloy 52 UNS N14052

Alloy 52 is a 50.50% nickel-iron alloy developed for glass-to-metal seals for some of the soft glasses and some ceramics.

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Strip, Coil, Foil & Wire, ASTM F30


Applications for Alloy 52 include magnetic reed switches and seals that need controlled linear expansion to approximately 977 °F (525 °C).


Alloy 52 is a 50.50% nickel-iron alloy developed for glass-to-metal seals for some of the soft glasses and some ceramics. The alloy's rate of thermal expansion is virtually constant to a temperature of about 1050 °F (565 °C).

Chemistry Typical

Carbon: 0.05 max
Silicon: 0.30 max
Manganese: 0.60 max
Nickel: 50.5 nom
Chromium: 0.25 max
Iron: Balance
Phosphorus: 0.025 max
Sulfur: 0.025 max
Aluminum: 0.10 max

Physical Properties of Alloy 52

Density: 0.30 lb/in3, 8.30 g/cm3

Electrical Resistivity: ohm-cir-mil/ft, microhm-cm:
At 68 °F (20 °C): 258 (43)

Thermal Conductivity: BTU-in/hr-ft2-°F (W/m•K):
68 - 212 °F (20 - 100 °C): 97 (140)

Mean Coefficient of Thermal Expansion: µin/in-°F (µm/m-°C):
77 - 842 °F (25 - 450 °C): 5.4 (9.8)

Melting Range: 2600 °F (1430 °C)


  • Sheet
  • Strip
  • Ribbon
  • Profile
  • Round
  • Flat
  • Square

Mechanical Properties of Alloy 52 at Room Temperature

Properties: Annealed Typical

Ultimate Tensile Strength: 78 KSI nom (536 MPa nom)
Yield Strength: 35 KSI nom (240 MPa nom)
Elongation: 30% nom
Hardness: Rb 73 nom

Properties: Tempered

Alloy 52 can be cold worked to various tempers. Contact Ulbrich Technical Service for additional information.

Additional Properties

Corrosion Resistance of Alloy 52

Refer to NACE (National Associate of Corrosion Engineers) for recommendations.


#1 - Hot rolled annealed and descaled. It is available in strip, foil and ribbon. It is used for applications where a smooth decorative finish is not required.
#2D - Dull finish produced by cold rolling, annealing and descaling. Used for deep drawn parts and those parts that need to retain lubricants in the forming process.
#2B - Smooth finish produced by cold rolling, annealing and descaling. A light cold rolling pass is added after anneal with polished rolls giving it a brighter finish than 2D.
#BA - Bright annealed cold rolled and bright annealed
#CBA - Course bright annealed cold rolled matte finish and bright anneal
#2 - Cold Rolled
#2BA- Smooth finish produced by cold rolling and bright annealing. A light pass using highly polished rolls produces a glossy finish. A 2BA finish may be used for lightly formed applications where a glossy finish is desired in the formed part.
Polished - Various grit finish for specific polish finished requirements.

* Not all finishes are available for all alloys — Consult Sales for applicable finishes.

Wire Finishes

XC - Extra clean. Bright annealed or bright annealed and cold rolled
Grease - Ultra bright finish for decorative applications
Soap - Soap is not removed from tempered wire to act as a lubricant.
* Contact Ulbrich Wire with special finish requests.

Heat Treatment

Alloy 52 is non hardenable by heat treatment.

Welding Alloy 52

For best results refer to: SSINA's "Welding of Stainless Steels and Other Joining Methods".

Limitation of Liability and Disclaimer of Warranty: In no event will Ulbrich Stainless Steels & Special Metals, Inc., be liable for any damages arising from the use of the information included in this document or that it is suitable for the 'applications' noted. We believe the information and data provided to be accurate to the best of our knowledge but, all data is considered typical values only. It is intended for reference and general information and not recommended for specification, design or engineering purposes. Ulbrich assumes no implied or express warranty in regard to the creation or accuracy of the data provided in this document.

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