Ferrosilicon is an important ferro alloy mainly used in the steel industry. Ferrosilicon 70 (usually indicating a silicon content of about 70%) is a special type. FeSi 70 is mainly composed of iron and silicon. Its silicon content is approximately 70%.It also usually contains small amounts of aluminum, calcium, magnesium, carbon and other elements, which may affect its performance and use.

According to relevant standards, the silicon content of 70 ferrosilicon must be no less than 70%, the aluminum content no more than 2%, the calcium content no more than 1%, the manganese content no more than 0.6%, the phosphorus content no more than 0.04%, the sulfur content no more than 0.02%, and the carbon content no more than 0.2%.

Common sizes include 0-3mm, 0-10mm, 3-8mm, 10-50mm, 10-60mm, and 10-100mm, and can also be customized according to customer needs.

Ferro Silicon FeSi 70 Alloy

chemical composition

Grade	Chemical Composition(mass fraction)%
	Si	Al	Ca	Mn	Cr	P	S	C
	≥	≤
FeSi90Al1.5	87.0~95.0	1.5	1.5	0.4	0.2	0.04	0.02	0.2
FeSi9oAl3.0	87.0~95.0	3	1.5	0.4	0.2	0.04	0.02	0.2
FeSi75Al0.5-A	74.0~80.0	0.5	1	0.4	I0.3	0.035	0.02	0.1
FeSi75Al0.5-B	72.0~80.0	0.5	1	0.5	0.5	0.04	0.02	0.2
FeSi75Al1.0-A	74.0~80.0	1	1	0.4	0.3	0.035	0.02	0.1
FeSi75Al1.0-B	72.0~80.0	1	1	0.5	0.5	0.04	0.02	0.2
FeSi75Al1.5-A	74.0-80.0	1.5	1	0.4	0.3	0.035	0.02	0.1
FeSi75Al1.5-B	72.0~80.0	1.5	1	0.5	0.5	0.04	0.02	0.2
FeSi75Al2.0-A	74.0~80.0	2	1	0.4	0.3	0.035	0.02	0.1
FeSi75Al2.0-B	72.0~80.0	2		0.5	0.5	0.04	0.02	0.2
FeSi75-A	74.0~80.0			0.4	0.3	0.035	0.02	0.1
FeSi75-B	72.0~80.0			0.5	0.5	0.04	0.02	0.2
FeSi65	65.0~72.0			0.6	0.5	0.04	0.02

ferro silicon 70 Application areas

Steel production:

Mainly used as deoxidizer in steel production to help remove oxygen from steel, thereby improving the quality and performance of steel.

Cast iron production:

Added to cast iron as an alloying element to improve the mechanical properties, fluidity and wear resistance of cast iron.

Other uses:

It can also be used in the production process of certain aluminum alloys and magnesium alloys to improve the properties of the alloys.

ferro silicon 70 Advantages and features

Enhanced strength:

Adding ferro silicon 70 to steel can significantly increase the strength and hardness of the steel.

Improved processing properties:

Helps improve the fluidity and casting properties of cast iron.

Deoxidation effect:

As a deoxidizer, it can effectively remove oxygen from steel and improve the purity and service life of steel.

ferro silicon 70

Ferrosilicon 75 and Ferrosilicon 70: Key Applications

1. Ferrosilicon 70: A "general-purpose" ferroalloy, emphasizing cost-effectiveness

Main application:

Primarily used for deoxidation in steelmaking, particularly for the large-scale production of plain carbon steel and low-alloy steel. Ferrosilicon 70's deoxidizing capacity already meets basic deoxidation needs, while offering a lower price and high cost-performance ratio.

It can also be used as a casting inoculant (to improve the grain structure of cast iron) or as a reducing agent in the production of mid- and low-end ferroalloys.

Core Advantages:

Low cost and wide applicability, making it a "basic deoxidizer" in the steel industry.

2. Ferrosilicon 75: A "high-end" ferroalloy with a focus on performance requirements.

Main Applications:

Used in the production of high-end steels (such as spring steel, bearing steel, electrical silicon steel, and heat-resistant steel): Its higher silicon content allows for more thorough deoxidation and allows for more precise adjustment of the silicon content in the steel, improving properties such as hardness, elasticity, and magnetic permeability.

Used in the casting of high-end cast irons (such as ductile iron and vermicular graphite iron): Its low aluminum and carbon content prevents defects such as porosity and slag inclusions in castings.

Used as a reducing agent in magnesium production (silicothermic magnesium smelting): Its high silicon content improves reduction efficiency, making it a core raw material in the magnesium smelting industry.