Quick Answer: Ferro silicon magnesium (FeSiMg) is a magnesium-bearing ferroalloy mainly used as a nodulizer in ductile iron production. It promotes spheroidal graphite formation in molten iron. ZhenAn supplies FeSiMg grades with 4.5–11.0% Mg, 0.5–8.0% total rare earth (RE), 1.0–3.5% Ca and 44–45% Si, depending on the selected grade.

Product: Ferro Silicon Magnesium (FeSiMg)

Application: Ductile Iron Production and Graphite Nodularization

Mg Content: 4.5–11.0% by grade

Total RE: 0.5–8.0% by grade

Ca Content: 1.0–3.5% by grade

Particle Size: 0–10 mm, 10–100 mm or customized

Packaging: 25 kg bags / 1 MT jumbo bags

For bulk orders, send us your required Mg, RE and Ca ranges, particle size, quantity and destination port to receive a grade recommendation and quotation.

Request FeSiMg Quotation

Ferro Silicon Magnesium Overview

Ferro silicon magnesium, commonly abbreviated as FeSiMg, is an iron-based alloy containing silicon and magnesium, with controlled additions of calcium and rare earth elements. It is primarily used as a nodulizer in the production of ductile iron, also known as spheroidal graphite (SG) iron.

During ductile iron production, magnesium is introduced into molten base iron through a controlled treatment process. Magnesium promotes the formation of spheroidal graphite instead of the flake-shaped graphite typically found in gray cast iron. This graphite structure is an important factor in the strength, ductility and toughness of the finished casting.

Different FeSiMg grades are designed for different base iron compositions and treatment conditions. Mg content, total rare earth (RE), calcium content and particle size should be evaluated together rather than selecting an alloy based on magnesium content alone.

At ZhenAn, we offer multiple rare earth ferro silicon magnesium grades to support the requirements of ductile iron foundries and industrial alloy distributors.

Ferro Silicon Magnesium Chemical Composition

The chemical composition of ferro silicon magnesium determines its suitability for different foundry treatment processes. Magnesium is the primary nodulizing element, while silicon, calcium and rare earth elements contribute to the overall alloy design.

Chemical Composition by Grade

Our FeSiMg product range includes several ReMgSiFe grade families. The following table summarizes their main chemical specifications.

Note: The table shows the listed grade specifications. Confirm the exact acceptance limits, including MgO and other residual elements, against the current technical specification and batch COA before ordering.

Functions of Mg, Si, Ca and Rare Earth Elements

Ferro Silicon Magnesium Uses

Ferro silicon magnesium is primarily used in foundries producing ductile iron castings. Its main function is to introduce magnesium into molten iron and promote the formation of spheroidal graphite.

Ductile Iron Pipes and Fittings

FeSiMg is used in ductile iron pipe production, where graphite nodularity and mechanical consistency are important for finished pipe performance. Foundries select the Mg and RE composition according to the base iron chemistry, treatment temperature and required mechanical properties.

Automotive and Heavy-Duty Castings

Automotive foundries use ductile iron for components such as crankshafts, suspension parts and structural castings. FeSiMg treatment helps establish the graphite morphology required for the specified ductile iron grade.

For these applications, consistent alloy chemistry and repeatable magnesium recovery are important considerations when selecting a nodulizer.

Pumps, Valves and Industrial Castings

Ductile iron is widely used in pump housings, industrial valves, machinery components and other engineering castings. FeSiMg supports the production of spheroidal graphite structures required by these applications.

Wind Power and Large Castings

Large ductile iron castings require careful control of molten iron treatment and pouring conditions. Foundries should evaluate Mg content, rare earth composition, treatment method and pouring time when selecting a suitable FeSiMg grade.

How to Select the Right FeSiMg Grade

Choosing a ferro silicon magnesium grade should start with the foundry’s actual treatment requirements rather than the highest available Mg content.

1. Confirm the target Mg content: Review the base iron chemistry and the required residual magnesium after treatment.
2. Evaluate total RE: Consider sulfur, interfering trace elements and the foundry’s existing treatment practice.
3. Compare calcium levels: Grades with similar Mg and RE contents may have different Ca ranges.
4. Select particle size: Match the size distribution to the treatment method and alloy addition requirements.
5. Verify the COA: Compare actual batch analysis with the agreed chemical specification.

For example, ReMgSiFe-03CeA and ReMgSiFe-03CeB both contain 6.0–8.0% Mg and 2.0–4.0% total RE. However, their Ca ranges differ: 1.0–2.0% for 03CeA and 2.0–3.5% for 03CeB. This is why buyers should evaluate the complete composition rather than comparing Mg content alone.

FeSiMg Production and Quality Control

Consistent chemical composition and physical size distribution are important for industrial FeSiMg supply. Each batch should be checked against the agreed purchase specification before shipment.

Chemical Composition Inspection

X-ray fluorescence (XRF) analysis can be used to check the chemical composition of FeSiMg. Depending on the purchase specification, buyers may require confirmation of:

• Magnesium (Mg)
• Silicon (Si)
• Total rare earth (RE)
• Cerium (Ce)
• Calcium (Ca)
• Aluminum (Al)
• Manganese (Mn)
• Titanium (Ti)
• Magnesium oxide (MgO)

Batch COA Verification

A Certificate of Analysis (COA) records the measured chemical composition of a specific batch. Buyers should compare the actual values with the contractual specification and confirm the sampling and inspection requirements before shipment.

For repeat orders, maintaining consistent grade identification, particle size and inspection requirements helps improve supply consistency.

Ferro Silicon Magnesium Particle Size and Packaging

Particle size affects how the alloy is introduced into molten iron and how it behaves during the treatment process. The required size should be selected according to the foundry’s ladle capacity, treatment method and addition practice.

Available Particle Sizes

Packaging Options

• 25 kg bags
• 1 MT jumbo bags
• Customized packaging according to order requirements

For international transportation, FeSiMg should be stored and packaged to minimize moisture exposure and contamination. Final packing details can be confirmed according to the destination market and buyer requirements.

Ferro Silicon Magnesium Price

The ferro silicon magnesium price depends on the chemical composition, raw material costs, particle size, order quantity and delivery terms. Different Mg and rare earth grades may have significantly different quotation levels.

Factors Affecting FeSiMg Price

To receive an accurate ferro silicon magnesium price per ton, please provide your target Mg, RE and Ca composition, particle size, order quantity, packaging requirements and destination port.

Get a Bulk FeSiMg Price

Ferro Silicon Magnesium HSN Code

The HS code for ferro silicon magnesium is generally classified under heading 7202, which covers ferroalloys. However, the final tariff classification depends on the importing country’s customs schedule and the actual product description and composition.

For Indian importers, the HSN tariff item for ferro-silico-magnesium is:

72029922

This is an India-specific eight-digit tariff item. Other countries may use different national tariff subdivisions under HS 7202.99. Importers should confirm the applicable code with their customs broker before customs declaration.

Why Choose ZhenAn for FeSiMg Supply?

For ductile iron foundries and ferroalloy distributors, selecting a FeSiMg supplier involves more than comparing the quoted price. Chemical consistency, grade availability, particle size and export coordination all influence the purchasing decision.

Multiple Chemical Grades

We offer different Mg, total RE and Ca compositions to support different ductile iron treatment requirements. Buyers can provide their existing technical specification for grade matching.

Batch Analysis and Documentation

We support chemical composition verification and batch COA requests so buyers can review the supplied material against the agreed purchase specification.

Flexible Particle Size and Packing

Available size and packaging arrangements can be discussed according to the selected grade, order volume and destination requirements.

Ferroalloy Supply Coordination

In addition to FeSiMg, we supply other metallurgical materials, including ferrosilicon. Buyers can contact our team to discuss related material requirements and consolidated procurement.

Frequently Asked Questions About Ferro Silicon Magnesium

1. What is ferro silicon magnesium used for?

Ferro silicon magnesium is mainly used as a nodulizer in ductile iron production. It introduces magnesium into molten iron to promote spheroidal graphite formation, which is essential for producing ductile iron castings.

2. What is the composition of ferro silicon magnesium?

FeSiMg mainly contains iron, silicon and magnesium, with controlled additions of calcium and rare earth elements. Our listed grades cover 4.5–11.0% Mg, 0.5–8.0% total RE, 1.0–3.5% Ca and 44–45% Si. Exact values depend on the selected grade.

3. What is ferro silico manganese used for?

Ferro silico manganese, commonly called ferro silicon manganese (FeSiMn), is a different alloy from ferro silicon magnesium. FeSiMn is mainly used in steelmaking as a source of manganese and silicon for deoxidation and alloying. FeSiMg, in contrast, is primarily used as a magnesium-bearing nodulizer in ductile iron foundries.

4. What determines the ferro silicon magnesium price?

The price depends on Mg content, total RE, Ca content, particle size, order quantity, packaging and shipping terms. Contact us with your target specification and destination port for a quotation.

5. What is the HSN code for ferro silicon magnesium?

For India, the specific HSN tariff item is 72029922. Other countries may apply different national tariff subdivisions, so importers should verify the classification with their local customs broker.

6. Can I request a COA before placing an order?

Yes. Buyers can request the applicable chemical specification and batch COA for review. We recommend confirming the Mg, Si, Ca, RE and other controlled elements before approving a bulk order.

Request a Ferro Silicon Magnesium Quotation

Looking for a ferro silicon magnesium supplier for your ductile iron foundry or alloy distribution business?

Send ZhenAn your required chemical composition, particle size, order quantity and destination port. Our team can help check the suitable grade and discuss the quotation, packaging and shipment arrangements.

ZHEN AN INTERNATIONAL CO., LIMITED

Email: [email protected]

Contact ZhenAn for FeSiMg