Meta Description: Discover vacuum induction melted (VIM) pure iron (99.98%+ Fe) with ultra-low impurities. Ideal for electromagnetic, medical, and nuclear industries. Customizable formats, ISO-certified.
Product Overview
vacuum induction melted (VIM) pure iron is engineered for industries requiring extreme material purity and uniform microstructure. With 99.98%+ iron content and controlled impurity levels (C <0.008%, O <10 ppm), this grade outperforms conventional pure iron in demanding applications such as precision magnetic components, medical implants, and nuclear research.
Key Features & Composition
Purity: Contains >99.98% iron with <0.02% carbon and negligible traces of sulfur, phosphorus, and other non-metallic elements.
Process: Melted under ultra-high vacuum (≤1×10⁻⁶ Torr) to remove gases (N₂, O₂, H₂) and volatile impurities, ensuring superior cleanliness.
Structure: Fine-grained, isotropic microstructure with excellent homogeneity, enhancing mechanical consistency.
Technical Specifications
Composition & Key Properties
|
Component |
Content |
Property |
Value |
|
Fe (Iron) |
≥99.98% |
Density |
7.87 g/cm³ |
|
C (Carbon) |
≤0.008% |
Tensile Strength |
180–220 MPa |
|
O (Oxygen) |
≤10 ppm |
Permeability (μ) |
Up to 140,000 H/m |
|
S (Sulfur) |
≤0.001% |
Electrical Resistivity |
10.1 μΩ·cm (20°C) |
|
P (Phosphorus) |
≤0.002% |
Melting Point |
1538°C |
Applications
Optimized for High-Performance Scenarios
|
Industry |
Use Cases |
Key Advantage |
|
Electronics |
Magnetic shielding, transformer cores |
Low hysteresis loss, high permeability |
|
Medical |
Biodegradable implants, surgical tools |
Biocompatibility, controlled corrosion |
|
Nuclear |
Radiation shielding, reactor components |
High thermal stability, minimal voids |
|
Aerospace |
Sensor components, cryogenic systems |
Uniformity across temperature extremes |
Unique Competitive Advantages
Why VIM Pure Iron Outperforms Conventional Grades
|
Factor |
VIM Pure Iron |
Traditional Pure Iron |
|
Impurity Control |
Oxygen ≤10 ppm, Carbon ≤0.008% |
Oxygen ≤100 ppm, Carbon ≤0.02% |
|
Microstructure |
Homogeneous grain structure |
Risk of slag inclusions |
|
Magnetic Consistency |
Stable permeability (±2% variance) |
±5–10% variance in permeability |
|
Surface Quality |
Mirror finish (Ra ≤0.1 μm post-polishing) |
Ra ≥0.5 μm |
Manufacturing Process
Step-by-Step VIM Refinement
1.Raw Material Selection: High-purity iron feedstock (>99.9% Fe).
2. Vacuum Melting: Induction melting under 10⁻³ mbar vacuum to remove gases (O₂, H₂, N₂).
3. Slag Refining: Alkaline slag treatment to eliminate trace sulfur and phosphorus.
4. Casting & Forming: Continuous casting into billets, rods, or custom shapes.
5.Annealing: Hydrogen atmosphere annealing to relieve stresses and enhance ductility.
FAQ
Q: Can VIM pure iron be machined into complex geometries?
A: Yes, its low carbon content enables excellent machinability for intricate parts.
Q: How does VIM compare to electrolytic refining?
A: VIM achieves lower oxygen content (<10 ppm vs. 50 ppm in electrolytic iron), critical for high-vacuum applications.
Q: Is this material suitable for high-temperature environments?
A: Stable up to 450°C; oxidation resistance can be enhanced with coatings.
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