Core Iron (VIM VAR) Properties | Ed Fagan Inc.

core iron (VIM VAR) soft magnetic alloy propertiesCore Iron (VIM VAR) is often used in the manufacture of soft magnetic components where vacuum integrity is needed such as in power tubes and microwave devices.

The tables below are provided as a reference for evaluating Core Iron’s properties for inclusion in your application.  Below you will find typical physical, mechanical, chemistry and specifications along with magnetic properties.

For a Core Iron data sheet, or any other Soft Magnetic Alloys data sheets, please go to our Alloys and Metals Literature Library section.

If you have any questions or need further property information, please contact the sales team at Ed Fagan Inc.

Core Iron (VIM VAR) Typical DC Magnetic Properties
Saturation Induction - Gauss21,500
Maximum Relative Permeability9,400
Coercive Force - Oersteds, max.1.5
Coercive Force - A/m68
Residual Induction (T)1.44
Note: Annealed at 843°C for four hours in wet hydrogen. Residual induction (Br) and coercive field strength, (Hcb) are measured from a maximum flux density of 1.5T.
Core Iron (VIM VAR) Typical AC Magnetic Properties
Core Loss W/lb @ 400Hz & 20k GN/A
B-40 Permeability @ 60HzN/A
N/A = not a typical application value
Core Iron (VIM VAR) Physical Properties 
Densitylb/cu in0.284
Specific Gravity7.86
Curie Temp°F1418
Melting Point°F2800
Electrical Resistivityµ Ohm13
Ohm-cir mil/ft78
Thermal ConductivityW/cm °C0.73
BTU-in/sq. ft-hr-°F508
Specific HeatCal/g ∙ °C0.108
Thermal Expansionppm / °F (75°F to 842°F)7.5
ppm / °C (20°C to 200°C)12.6
Core Iron (VIM VAR) Mechanical Properties 
Tensile Strengthksi50
Yield Strengthksi27
Elongation% in 2 in.45
Typical Hardness Ann.Rockwell HRB65
Modules of ElasticityMpsi30
Core Iron (VIM VAR) Chemistry 
Carbon, max.0.020
Manganese, max.0.35
Silicon, max.0.15
Phosphorous, max.0.030
Sulfur, max.0.025
Chromium, max.0.20
Nickel, max.0.15
Vanadium, max.0.10
Titanium, max.0.10
Aluminum, max.0.10
Vanadium, titanium and aluminum are not required but may be added to surpress magnetic aging; if present they shall be analyzed and reported.
Source: ASTM International. A848-17 Standard Specification
Core Iron (VIM VAR) Specifications
ASTM A848 Type 1

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.

Ed Fagan Inc. is a leading global distributor of the highest quality special purpose metals and alloys. Our stock includes an unmatched inventory of soft magnetic, refractory, controlled expansion and electronic nickels.  The materials you need, when you need them!



CarTech® Core Iron (VIM VAR) is a registered trademark of CRS Holdings, Delaware.