EFINEA supplies Core Iron (VIM VAR) a low carbon magnetic iron that is produced using vacuum induction melting plus vacuum arc re-melting practices when vacuum integrity is needed. As a guide in your evaluation of this material, the property values are contained in the tables below in which you will find the typical magnetic, physical and mechanical properties including its chemistry.
This premium commercially pure iron is able to display a wide variety of magnetic characteristics that are a function of the heat treatment process. To achieve the most magnetically soft condition, please refer to Ferromagnetic Annealing Core Iron.
If you need further property information or have questions about Core Iron (VIM VAR), please contact the EFINEA sales team.
Core Iron (VIM VAR) Typical DC Magnetic Properties |
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|---|---|
| Saturation Induction - Gauss | 21,500 |
| Maximum Relative Permeability | 9,400 |
| Coercive Force - Oersteds | 1.5 |
| Coercive Force - A/m | 68 |
| 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. | |
| Source: ASTM A848-17 Table x1.1 | |
Core Iron (VIM VAR) Mean Coefficient of Expansion |
|||
|---|---|---|---|
| Temp Range 25°C to: | Coefficient ppm per °C | Temp Range 25 °C to: | Coefficient ppm per °C |
| 100° | 12.2 | 500° | 15.5 |
| 200° | 12.6 | 600° | 15.5 |
| 300° | 13.6 | 700° | 15.8 |
| 400° | 14.5 | ||
| Source: EFI Master Carpenter VIM VAR Core Iron | |||
Core Iron (VIM VAR) Typical Physical Properties |
||
|---|---|---|
| Density | lb/cu in | 0.284 |
| Specific Gravity | 7.86 | |
| Curie Temp | °F | 1418 |
| °C | 770 | |
| Melting Point | °F | 2800 |
| °C | 1538 | |
| Electrical Resistivity | ohm-cir mil/ft | 78 |
| µ ohms-cm | 13 | |
| Thermal Conductivity | BTU-in/sq. ft-hr-°F | 508 |
| W/cm °C | 0.73 | |
| Specific Heat | J/kg∙K | 452 |
| Cal/gm °C | 0.108 | |
| Thermal Expansion | ppm/°C (25°C to 200°C) | 12.6 |
| Source: EFI Master Carpenter VIM VAR Core Iron | ||
Core Iron (VIM VAR) Typical Mechanical Properties |
||
|---|---|---|
| Tensile Strength | ksi | 50 |
| MPa | 345 | |
| Yield Strength | ksi | 27 |
| MPa | 190 | |
| Elongation | % in 2". | 45 |
| Typical Hardness Ann. | Rockwell HRB | 65 |
| Modulus of Elasticity | ksi | 30 |
| MPa | 207 | |
| Source: EFI Master Carpenter VIM VAR Core Iron | ||
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 | |
| Iron | Balance | |
| Vanadium, titanium and aluminum are not required but may be added to suppress magnetic aging; if present they shall be analyzed and reported. | ||
| Source: ASTM International. A848-17 Standard Specification, Table 1, Alloy Type 1 | ||
Core Iron (VIM VAR) Specifications |
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|---|---|
| ASTM A848 Type 1 |
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.
EFINEA 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.