Silicon Calcium Alloy

Silica calcium alloy is a composite alloy composed of elemental silicon, calcium and iron, which is a kind of ideal compound deoxidizer and desulfurizer. It is widely used in the production of high-quality steel, low carbon steel, stainless steel and other steel and nickel-based alloys, titanium-based alloys and other special alloys; it is also suitable for use as a temperature increaser in converter steel workshop; it can also be used as an inoculant in the production of cast iron and additive in the production of ductile iron.

Both calcium and silicon have a strong affinity for oxygen. Especially calcium, not only with oxygen has a very strong affinity, but also with sulfur and nitrogen have a strong affinity. Therefore, silicon calcium alloy is a more ideal composite glue oxygen agent, desulfurization agent. Silicon alloy not only deoxidizing ability, deoxidizing product is easy to float, easy to discharge, but also can improve the performance of steel, improve the plasticity, impact toughness and mobility of steel. At present, calcium silicon alloy can replace aluminum for final deoxidation. Being applied to high-quality steel. Special steel and special alloy production. For example, rail steel, mild steel, stainless steel and other steel and nickel-based alloys, titanium-based alloys and other special alloys, can be used calcium silicate alloy as a deoxidizer.

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Product Description

What is Calcium Silicon Alloy (CaSi)?

Calcium Silicon Alloy (CaSi) is a ferroalloy composed of calcium (Ca), silicon (Si), and trace iron (Fe). It is widely used in steelmaking and foundry processes to improve metal purity, mechanical properties, and production efficiency. CaSi is an ideal compound deoxidizer, desulfurization agent.

At present calcium alloy can be used instead of aluminum for final deoxidation, is applied to high-quality steel, special steel and special alloys production. Such as rail and low carbon steel, stainless steel, steel and nickel base alloy, titanium alloy and other special alloy,

Calcium Silicon Alloys are used as deoxidizer and desulfurizer in the manufacturing of high grade steel. Indeed, Calcium and Silicon both have a strong chemical affinity for oxygen. Especially calcium, have a strong chemical affinity not only for oxygen, but also for sulphur and nitrogen. The steel industry accounts for around 90 % of global CaSi consumption.

Calcium Silicon Technical Specifications

Brand	Chemical Composition(%)
	Ca	Si	C	Al	P	S
	≥	≥	≤
Ca31Si60	31	55-65	1.0	2.4	0.04	0.06
Ca28Si60	28	55-65	1.0	2.4	0.04	0.06
Ca24Si60	24	55-65	1.0	2.5	0.04	0.04
Ca20Si55	20	50-60	1.0	2.5	0.04	0.04
Ca16Si55	16	50-60	1.0	2.5	0.04	0.04
Other chemical composition and size can be supplied upon request.

Applications of Calcium Silicon Alloy

1. Steelmaking Industry

Deoxidation: Removes oxygen from molten steel, reducing porosity and inclusions.
Desulfurization: Lowers sulfur content for improved ductility and toughness.
Inclusion Modification: Transforms harmful inclusions into harmless spherical particles.

2. Cast Iron Production

Graphite Nodularization: Enhances graphite formation in ductile iron, boosting strength and wear resistance.
Reduces Chill Effect: Prevents white iron formation in thin-walled castings.

3. Specialty Alloys

Used in magnesium-based alloys and high-purity aluminum refining.

Why Choose Our Calcium Silicon Alloy?

1. Superior Quality Control

ISO 9001-certified production with strict chemical composition standards.
Low impurity levels (Al, C, S ≤1%).

2. Customizable Solutions

Available in lumps (10-50mm), powder, or inoculant core wires for precise application.
Adjustable Ca/Si ratios to meet specific industry needs.