Views: 0 Author: Site Editor Publish Time: 2026-09-08 Origin: Site
Ferro Silicon Magnesium (FeSiMg) is a master alloy used primarily as a nodulizer in the production of ductile (SG) iron. It enables the transformation of graphite flakes into spheroids, giving the iron superior strength, ductility, and toughness compared to traditional gray iron. As a reliable FeSiMg supplier, we offer a full range of grades to meet the diverse needs of foundries worldwide.
Ferro Silicon Magnesium is an alloy composed primarily of magnesium, silicon, and iron. Magnesium is the key element that modifies graphite morphology in cast iron. However, because pure magnesium reacts violently with molten iron, it is introduced as a carrier alloy—FeSiMg—which ensures a safer, more controlled reaction, reducing metal loss and splashing.
Typical FeSiMg alloys contain:
Magnesium (Mg): 4–11% (primary nodulizing agent)
Silicon (Si): 38–48% (helps control reaction and promotes graphitization)
Calcium (Ca): 0.5–3.0% (reduces reaction severity and improves Mg recovery)
Rare Earth Elements (REE): 0–8% (refines nodule count and controls carbide formation)
Ferro Silicon Magnesium offers distinct metallurgical and economic advantages:
Superior Mechanical Properties: Nodular graphite produced by FeSiMg treatment gives ductile iron high tensile strength, impact resistance, and fatigue strength—making it suitable for automotive, pipe, and machinery applications.
Controlled Reaction & High Recovery: The addition of calcium and REE helps stabilize magnesium, reduces oxidation, and can achieve Mg recovery rates exceeding 74% in optimized processes.
Cost-Effective Nodulization: FeSiMg achieves the desired nodularity with relatively low Mg additions, even for base iron with high sulfur levels.
Improved Machinability & Casting Quality: The nodular graphite structure acts as a lubricant during machining, reducing tool wear. Controlled REE levels also minimize carbide formation in thin sections.
We provide FeSiMg alloys in a variety of grades tailored to your base iron composition and casting requirements. Our alloys are produced with strict quality control, using XRF analysis to ensure consistent chemistry.
Grade | Mg (%) | Ca (%) | TRE (%) | Si (%) | Fe |
|---|---|---|---|---|---|
FeSiMg5RE2 | 4.0–6.0 | 2.0–3.0 | 1.0–3.0 | 38–44 | Balance |
FeSiMg7RE1 | 6.0–8.0 | 1.0–1.5 | 0.5–1.5 | 38–44 | Balance |
FeSiMg8RE3 | 7.0–9.0 | 2.0–3.5 | 2.0–4.0 | 38–44 | Balance |
FeSiMg10RE7 | 9.0–11.0 | 2.0–3.5 | 6.0–8.0 | 38–44 | Balance |
Nodule Plus | 7.5–8.5 | Proprietary | Proprietary | 43–48 | Balance |
Size Options: We offer a range of particle sizes to suit different ladle treatment processes, including 0.25–2mm, 1–5mm, 5–20mm, 10–30mm, and customized sizes upon request.
Our FeSiMg is produced using advanced techniques to ensure homogeneity and performance. We employ a one-step production method that uses the heat of molten ferrosilicon to melt magnesium ingots, significantly reducing energy consumption compared to traditional two-step processes. This innovative approach not only lowers power usage but also enhances magnesium recovery through protective coating of magnesium ingots.
Automotive: Engine components, exhaust manifolds, chassis parts
Pipes & Fittings: Ductile iron pipes for water and gas transmission
Heavy Machinery: Gears, rollers, and industrial equipment requiring high wear resistance
General Engineering: High-strength castings for various structural applications
We are committed to delivering consistent, high-quality FeSiMg alloys. Each batch undergoes rigorous testing using X-Ray Fluorescence Spectrometry to verify chemical composition, ensuring you receive exactly the nodulizer you need for optimal casting performance.
