Product Overview

✨🌟🧲 Silicon Magnesium (SiMg) alloy is an essential additive widely used in modern metallurgical industries . It is primarily employed in the production of ductile (nodular) iron due to its strong nodulizing and desulfurizing properties. By combining the benefits of both silicon and magnesium , this alloy plays a crucial role in modifying graphite structure and enhancing the mechanical performance of cast components. The presence of magnesium in the alloy promotes the formation of spheroidal graphite , which greatly improves ductility and toughness . Meanwhile, silicon contributes to deoxidation and strengthening of the iron matrix . SiMg alloy is available in different compositions tailored to the specific requirements of various iron foundries and steel plants . It is generally supplied in lump or granular form , with customizable particle sizes to suit different treatment methods . Because of its efficiency , ease of application , and compatibility with other alloying materials , SiMg has become a standard material in ductile iron production and select steelmaking operations .

Physical Properties

Silicon Magnesium alloy exhibits a range of physical characteristics that make it suitable for use in both ladle 🪣 and in-mold treatment processes . It typically appears as grey to silver metallic lumps , with a granular texture 🪨. The standard particle size ranges from 5–50 mm , but customized sizes can be provided to fit specific operational requirements . The density of SiMg ranges between 2.5 – 3.0 g/cm³ , ensuring a manageable addition to molten metals without excessive floating or loss. The melting point is approximately 1,200°C , which enables rapid dissolution and effective interaction with the melt . These physical traits are critical in ensuring the alloy's reactivity , ease of use , and consistency during metallurgical operations.

Ferro Silicon Magnesium

FeSiMg Specification

Chemical Analysis
% Mg	% Ca	% TRE	% Al	% Si	% Fe
5-6	0.5-1	0.5-1	1.2 Max.	43-48	Balance
5-6	1-1.5	1-1.5	1.2 Max.	43-48	Balance
5-6	1.5-2	1.5-2	1.2 Max.	43-48	Balance
5-6	1-1.5	–	1.2 Max.	43-48	Balance
6-7	0.5-1	0.5-1	1.2 Max.	43-48	Balance
6-7	1-1.5	1-1.5	1.2 Max.	43-48	Balance
6-7	1.5-2	1.5-2	1.2 Max.	43-48	Balance
7-8	2-2.5	2-2.5	1.2 Max.	43-48	Balance
8-10	0.5-1	0.5-1	1.2 Max.	43-48	Balance
8-10	1.5-2	1.5-2	1.2 Max.	43-48	Balance
8-10	1-1.5	–	1.2 Max.	43-48	Balance

Alloying Capabilities

SiMg acts as both a nodulizer and deoxidizer in cast iron production . Its ability to combine with sulfur and oxygen enhances iron matrix purity , improving mechanical properties . It is also compatible with other alloys like FeSi and CaSi , allowing custom alloying strategies .