Alloy 42 Properties

alloy 42 properties physical mechanical expansion chemistry specificationsEd Fagan Inc. is the unsurpassed leader in supplying nickel-iron alloys to the industry.  Below find the Alloy 42 properties including physical properties, mechanical properties, chemistry, thermal expansion data and material specifications.

Our experienced team of technical experts are available to answer your questions. Please contact us at 800-348-6268 should you have any questions about our alloys.

For an Alloy 42 data sheet, or any other Controlled Expansion Alloy data sheets, please go to our Alloys and Metals Literature Library section.

Alloy 42 Average Linear Coefficient of Thermal Expansion
Temperature Range °CTemperature Range °C
30 to 3004.430 to 70010.5
30 to 4006.030 to 80011.4
30 to 5007.930 to 90012.3
30 to 6009.630 to 100013.2

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 42 Physical Properties
Densitylb/cu in0.293
Specific Gravity8.12
Curie Temp°F716
Melting Point°F2600
Electrical ResistivityMicrohms-cm71
ohm-cir mil/ft430
Thermal ConductivityW/cm °C0.11
BTU-in/sq. ft-hr-°F74.5
Specific HeatCal/gm °C0.12
BTU/lbm- °F0.12
Thermal Expansionppm / °F (75°F to 842°F)3.9
ppm / °C (25°C to 450°C)7.0
Alloy 42 Mechanical Properties
Tensile Strengthksi82
Yield Strengthksi40
Elongation% in 2 in.30
Typical Hardness Ann.Rockwell HRB80
Modulus of ElasticityMpsi21.0
Alloy 42 Chemistry 
Nickel, nominal41.00
Manganese, max. 0.80
Silicon, max. 0.30
Carbon, max. 0.05
Chromium, max. 0.25
Phosphorus, max. 0.025
Sulfur, max. 0.025
Cobalt, max.*
Aluminum, max. 0.10
*Cobalt is present as an incidental element and shall be reported separately.
Source: ASTM F30
Alloy 42 Specifications
ASTM F30MIL-I-23011 CL 5AMS 1-23011 CL 5UNS K94100

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.