Low Gas Content Iron Billet
Ultra-Low Oxygen & Nitrogen | High Purity for Vacuum Melting & Precision Casting
Product Overview
Gas impurities (oxygen, nitrogen, hydrogen) are invisible enemies in high‑performance alloys and castings. They cause:
Porosity & pinholes – leading to rejected castings
Oxide inclusions – reducing fatigue life
Hydrogen embrittlement – risk of cracking
Our low gas content iron billet is engineered to overcome these challenges. Through controlled electrolytic refining followed by vacuum degassing and inert atmosphere hot rolling, we achieve exceptionally low levels of O, N, and H. The result is a clean, dense iron billet that performs reliably in vacuum melting, precision casting, and specialty alloy production.
As the actual manufacturer, we provide factory-direct pricing and full traceability, including gas analysis certificates (O, N, H by inert gas fusion). Custom sizes and chemical compositions are available upon request.
Choose Our Low Gas Content Iron Billet?
Gas Control – The Hidden Differentiator
Most iron suppliers focus only on elemental chemistry (C, Si, Mn, P, S). But for critical applications, gas content is equally important. Our typical gas levels:
| Gas Element | Typical (ppm) | Guaranteed Max (ppm) |
|---|---|---|
| Oxygen (O) | 30 ppm | 50 ppm (0.005%) |
| Nitrogen (N) | 20 ppm | 40 ppm (0.004%) |
| Hydrogen (H) | 1.5 ppm | 3 ppm (0.0003%) |
These low gas levels directly translate to fewer rejects, longer component life, and higher yield in your melting or casting process.
Designed for Vacuum Melting & Precision Casting
Vacuum induction melting (VIM): Our billet contains minimal dissolved gases, reducing outgassing and splashing during VIM.
Investment casting: Low oxygen means fewer oxide films and inclusions in thin‑wall castings.
Superalloy production: Clean iron base prevents gas‑related defects in nickel‑iron superalloys.
Factory Direct – Real Quality, Real Price
We operate our own electrolytic iron plant and vacuum degassing unit. You avoid trader markups (save 15‑25%) and receive:
Direct access to our gas analysis data for each heat
Short lead times – 10‑15 days for standard sizes
Customized gas specifications available (e.g., O ≤ 30 ppm upon request)
Applications
| Industry | Use Case | Why Low Gas Matters |
|---|---|---|
| Aerospace superalloys | Base iron for Ni‑Fe alloys (Invar, Kovar) | Prevents gas porosity and embrittlement |
| Precision investment casting | Clean iron source for thin‑wall castings | Reduces oxide inclusions and surface defects |
| Vacuum induction melting (VIM) | Charge material for specialty steels | Minimizes outgassing and alloy composition drift |
| Medical device alloys | High‑purity iron for implantable devices | Eliminates toxic inclusions and gas‑related failures |
| Nuclear components | Low‑hydrogen iron for reactor parts | Hydrogen‑induced cracking is unacceptable |
Frequently Asked Questions
Q: Why is low gas content important in iron billet?
A: Oxygen forms oxide inclusions that reduce fatigue life. Nitrogen can cause nitride embrittlement. Hydrogen leads to cracking (hydrogen embrittlement) and porosity. For vacuum melting or precision casting, low gas content is critical for defect‑free results.
Q: How do you test gas content?
A: We use inert gas fusion (IGF) analyzers (LECO) per ASTM E1019 for O and N, and ASTM E1447 for H. Each heat is sampled from the billet core after hot rolling. Results are included in our Certificate of Analysis.
Q: Can you achieve even lower oxygen, e.g., ≤30 ppm?
A: Yes. For applications requiring oxygen ≤30 ppm (0.003%), we offer a premium grade. Please contact us with your target specification – additional processing may extend lead time by 5‑7 days.
Q: Is this billet suitable for vacuum induction melting (VIM) without pre‑melting degassing?
A: Yes. Our low gas content billet is specifically designed for VIM feed. You can charge directly without prior degassing, reducing cycle time and improving melt quality.
Q: What sizes are available?
A: Standard square billets: 60×60 mm, 80×80 mm, 100×100 mm, 150×150 mm. Rectangular and round billets available. Length from 500 mm to 6 meters. Custom sizes welcome.
Q: What is your MOQ for low gas content billets?
A: MOQ is 3 tons for standard sizes. Trial orders (500‑1000 kg) are available for evaluation – please inquire.
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