Ferro Silicon 72 10-50mm is a premium ferrosilicon alloy engineered for industrial precision, featuring a silicon content of ~72% (with grade-specific ranges of 65.0%~95.0%) and a natural lump form sized 10-50mm. Crafted through advanced crushing and screening processes, this alloy balances high silicon concentration with ultra-low impurity levels (carbon ≤0.2%, phosphorus ≤0.04%, sulfur ≤0.02%) to deliver exceptional performance in casting, steelmaking, and alloy production. With excellent deoxidizing, inoculating, and alloying capabilities, it is a trusted choice for manufacturers seeking consistent quality and process efficiency worldwide.

Ferro Silicon 72 10-50mm

chemical composition

Grade	Si (%)	Al ≤ (%)	Ca ≤ (%)	Mn ≤ (%)	P ≤ (%)	S ≤ (%)	C ≤ (%)
FeSi72-B	72.0–80.0	2.0	1.0	0.5	0.04	0.02	0.2
FeSi72-A	74.0–80.0	2.0	1.0	0.4	0.035	0.02	0.1
FeSi65	65.0–72.0	–	–	0.6	0.04	0.02	–

Specific addition ratio of FeSi 72 size 10-50mm in casting production

1) Steelmaking Deoxidation & Alloying

Used as a strong deoxidizer to remove oxygen in molten steel, prevent porosity, and improve ingot density.
As an alloying element, it enhances strength, toughness, elasticity, and wear resistance in carbon steel, low-alloy steel, spring steel, and electrical steel.
Dosage: 0.2%–0.5% of molten steel weight, adjusted based on oxygen content.

2) Gray Cast Iron Inoculation

Promotes graphite refinement, reduces white cast, improves machinability and mechanical properties.
Dosage: 0.2%–0.8% of molten iron weight; 0.6%–0.8% for high-performance parts.

3) Ductile Iron Production

Acts as an auxiliary inoculant for spheroidization, improving nodularity and toughness.
Spheroidization auxiliary: 0.5%–1.5%; post-inoculation: 0.3%–0.8%.

4) Cast Steel Smelting

Deep deoxidation and purification, improving density and performance of precision and engineering castings.
Dosage: 0.2%–0.5%, higher for high-purity requirements.

5) Other Applications

Raw material for silicon-based master alloys
Reducing agent in metallurgical processes
Additive for wear-resistant and heat-resistant alloys

Ferro Silicon 72 10-50mm

Key Advantages of FeSi 72 10-50mm

Optimized 10-50mm Lump Size: Natural lump form ensures easy handling, uniform melting, and consistent addition in industrial processes-reducing dust and waste.
High Silicon Content: ~72% silicon concentration boosts deoxidizing, inoculating, and alloying efficiency, improving end-product performance.
Low Impurity Levels: Strict control over C (≤0.2%), P (≤0.04%), S (≤0.02%) minimizes adverse effects on material properties, ensuring high-quality castings/steel.
Versatile Application: Suitable for gray cast iron, ductile iron, cast steel, and alloy production-adapting to diverse manufacturing needs.
Customizable Solutions: Flexible grades, sizes (0~1mm to 10~100mm), and purity options (low phosphorus, low aluminum, low carbon) to match specific process requirements.