Product Overview
Cold-rolled pure iron sheets (≥99.8% Fe) are ultra-high purity ferrous materials engineered through specialized rolling and annealing processes. Unlike standard steel, these sheets contain minimal carbon (<0.02%) and trace impurities, enabling exceptional magnetic properties, formability, and corrosion resistance. The cold reduction process compresses hot-rolled coils to precise thicknesses (0.14mm–3.2mm), followed by recrystallization annealing to restore ductility. This refines the grain structure while enabling unique texture control-resulting in a material ideal for electromagnetic shielding, precision instruments, and high-reliability components where conventional steels fall short.
Technical Specifications
|
Parameter |
Specifications |
Testing Standard |
|
Thickness Range |
0.14 mm – 3.2 mm |
ASTM A370 |
|
Width |
Up to 1,850 mm |
ISO 9444 |
|
Purity |
≥99.8% Fe |
Spark OES |
|
Tensile Strength |
300–440 MPa (Dead-Soft to Skin-Rolled Tempers) |
ASTM E8 |
|
Magnetic Permeability |
5,000–10,000 μH/m (Initial) |
IEC 60404-4 |
|
Surface Roughness |
Matte (Ra 20–80 μin) to Best Bright (Ra ≤4 μin) |
ISO 4287 |
Note: Custom tempers (Dead-Soft, Skin-Rolled, Half-Hard) available for specific ductility/hardness needs.
Why Pure Iron Outperforms Steels in Critical Applications?
- Electromagnetic Shielding: 30% higher saturation flux density (2.15 T) vs. electrical steels (1.6 T) and Mu-metal (0.8 T), diverting low-frequency fields more efficiently.
- Formability: Dead-soft grades achieve ≥40% elongation-superior to cold-rolled steels (≤36%)-enabling complex deep-drawn enclosures without cracking.
- Corrosion Resistance: Ultra-low sulfur/phosphorus (<0.010%) minimizes pitting in humid environments.
- Thermal Stability: No carbide precipitation up to 400°C, ensuring consistent properties in sensors/actuators.
Competitive Edge vs. Alternatives
|
Material |
Saturation Flux Density |
Relative Cost |
Formability (Elongation%) |
Limitations |
|
Cold-Rolled Pure Iron |
2.15 T |
1.0x |
32–40% |
Requires oiling for corrosion resistance |
|
Electrical Steel |
1.6 T |
0.7x |
20–28% |
High core losses above 100 Hz |
|
Mu-Metal |
0.8 T |
3.5x |
3–5% |
Fragile, cannot be formed |
|
Aluminum |
N/A |
1.2x |
40–50% |
No magnetic shielding |
FAQs
Q: Can these sheets be welded or laser-cut?
A: Yes-low carbon equivalence (<0.12) minimizes HAZ cracking. Use TIG welding with Argon shielding or fiber lasers (1kW power).
Q: How does thickness reduction impact formability?
A: 25% cold rolling raises tensile strength by 48% but reduces elongation to 9.5%. Annealing restores ductility-specify skin-rolled (No.4) or dead-soft (No.5) tempers for forming.
Q: Is corrosion protection required?
A: For indoor use, oiling suffices. Outdoor/harsh environments need nickel flash (Ni-Flash treatment available) or powder coating.
Why Partner With Us?
We leverage patented continuous annealing (CN101597674B, US10697040B2) to deliver texture-controlled pure iron sheets unmatched in:
- Consistency: ±5% permeability deviation lot-to-lot.
- Customization: 0.14mm ultrathin foils for sensors to 3.2mm plates for shielding walls.
- Sustainability: 30% lower energy vs. traditional pyrometallurgical refining.
Request Samples to experience how our cold-rolled pure iron sheets elevate your product's performance in EMI shielding, precision mechanics, and critical components. Custom slitting, coating, and temper options available.
Contact us for a customized solution!
📫：sales3@beilunmetal.com
📞：8619335134327
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