Alloy 52 Properties

alloy 52 properties physical mechanical expansion chemistry specifications

EFINEA is pleased to supply you with a summary of Alloy 52’s typical properties.  The tables below include the average linear coefficient of thermal expansion, physical and mechanical properties, chemistry, and specifications for reference in evaluating Alloy 52 characteristics as an iron-nickel sealing alloy.


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Call the EFINEA team at 800-348-6268 with any questions you may have relating to Alloy 52 and your next application.


To download the EFINEA Alloy 52 data sheet, or any of our other Controlled Expansion Alloys data sheets, please go to the Data Sheets section in our Technical Library.

Alloy 52 Average Linear Coefficient of Thermal Expansion µm/m • °C

Temperature Range °CUNS N14052Temperature Range °CUNS N14052
30 to 300 10.130 to 60010.8
30 to 400 9.930 to 70011.7
30 to 4509.7 to 10.2*30 to 800 12.5
30 to 500 9.930 to 90013.3
30 to 55010.0 to 10.5*30 to 100014.2
Source: ASTM F30-96 (2017), Table X1.1; *ASTM F30-96, Table 2

To compare the linear coefficient of thermal expansion across our line of controlled expansion glass and sealing alloys, please refer to the Thermal Expansion Table.

Alloy 52 Typical Physical Properties

Densitylb/cu in0.30
Specific Gravity8.3
Curie Temp°F986
Melting Point°F2600
Electrical Resistivitymicrohms-cm43
Thermal ConductivityW/cm °C18
Specific HeatCal/g °C0.12
Source: ASTM F30-96 (2017), Carpenter Controlled Expansion Alloys Brochure v. 12/99 p. 20-21

Alloy 52 Typical Mechanical Properties

Tensile Strengthksi75
Yield Strengthksi40
Elongation% in 2 in.35
Hardness Rockwell80
Modulus of Elasticity ksi23
Strip as annealed.
Source: Carpenter Controlled Expansion Alloys Brochure v. 12/99 p. .20-21

Alloy 52 Chemistry

Nickel, nominal50.5
Manganese, max 0.60
Silicon, max 0.30
Carbon, max 0.05
Chromium, max 0.25
Cobalt, max*
Phosphorus, max 0.025
Sulfur, max 0.025
Aluminum, max 0.10
Nickel contents listed are nominal. The nickel contents of the alloy shall be adjusted by the manufacturer so that the alloys meet the requirements for thermal expansion. Alloy 52 is specifically intended to match lead (Pb) sealing glasses.
*Cobalt is present as an incidental element and shall be reported separately.
Ref: ASTM F30

Alloy 52 Specifications

ASTM F30MIL-1-23011 CL 2AMS 1-23011 CL 2UNS N14052

For additional information on specifications of the materials distributed by EFINEA, please visit the websites of the international organizations that develop and publish technical standards: ASTM International and ASM International.