Alloy 48 Properties

alloy 48 properties physical mechanical expansion chemistry specificationsEd Fagan Inc. recognizes that mechanical and physical properties are key factors in the evaluation and material selection of an alloy for any given application.  The data below contains Alloy 48 properties as a general reference when assessing this alloy. This includes the chemistry, mechanical and physical properties tables, along with specifications and thermal expansion data.

Ed Fagan Inc. is the unsurpassed leader in supplying iron-nickel alloys for electronic applications.  Our teams are trained in the materials we sell and we provide on-staff, metallurgical expertise.  Plus our extensive library of technical papers and manufacturers data sheets spans fifty plus years.

For an Alloy 48 data sheet, or any other Controlled Expansion Alloy data sheets, please go to our Alloys and Metals Literature Library section.

Alloy 48 Average Linear Coefficient of Thermal Expansion
Temperature Range,°CTemperature Range,°C
30 to 3008.830 to 70011.3
30 to 4008.730 to 80012.1
30 to 5009.430 to 90013.0
30 to 60010.430 to 100013.9

For comparison linear coefficient of thermal expansion data on all of our controlled expansion, glass and ceramic sealing alloys, please refer to our Thermal Expansion Table.

Alloy 48 Physical Properties
Densitylb/cu in0.298
Specific Gravity8.25
Curie Temp°F880
Melting Point°F2600
Electrical ResistivityMicrohms-cm49
ohm-cir mil/ft290
Thermal ConductivityW/cm °C0.13
BTU-in/sq. ft-hr- °F90.0
Specific HeatCal/gm °C0.12
BTU/lbm- °F0.12
Thermal Expansionppm / °F (75°F to 842°F)5.0
ppm / °C (30°C to 450°C)9.0
Alloy 48 Mechanical Properties
Tensile Strengthksi79
Yield Strengthksi36
Elongation% in 2 in.30
Typical Hardness Ann.Rockwell HRB80
Modulus of ElasticityMpsi23
Alloy 48 Chemistry 
Nickel, nominal48.0
Manganese, max0.80
Silicon, max0.30
Carbon, max0.05
Chromium, max0.25
Cobalt, max*
Phosphorus, max0.025
Sulfur, max0.025
Aluminum, max0.10
The nickel contents listed are nominal. The nickel contents of the alloys shall be adjusted by the manufacturer so that the alloys meet the requirements for thermal expansion.
Cobalt is present as an incidental element and shall be reported separately.
Source: ASTM F30
Alloy 48 Specifications
ASTM F30MIL-1-23011 CL 3AMS 1-23011 CL 3UNS K94800

For additional information on specifications of the materials distributed by Ed Fagan Inc., please visit the websites of the international standards organizations that develops and publishes technical standards, ASTM International and ASM International.