FeSi 45 is a ferrosilicon alloy containing 43–47% silicon, used as a deoxidizer, alloying additive, and inoculant in metallurgical production. It is widely applied in steelmaking, iron casting, welding consumables, powder metallurgy, and other industrial manufacturing processes.

product-1080-1440

Product Specifications

Product name	FeSi 45
Chemical content	Si:43-47% Mn＜0.70% P＜0.04% S＜0.02% C＜0.10%
Size	40mesh ,50 mesh ,60 mesh and so on .
Production Process	Electric furnace smelting/vacuum water atomizing/drying/screening

Applications

Steel Manufacturing – Used as a deoxidizer and alloying additive to improve steel cleanliness and control chemical composition.

Iron Foundries – Added during cast iron production to promote graphitization and improve casting quality.

Welding Consumables – Used in welding electrode and flux production as a silicon alloy source for metallurgical reactions.

Powder Metallurgy – Fine powder is blended into metal powder formulations for sintered components and specialty alloys.

Special Alloy Production – Used as a silicon-bearing raw material in the manufacture of various ferrous alloys.

product-1080-1440

Production & Quality Assurance

Production Process

Step	Description
Electric Furnace Smelting	Smelt silica and carbon materials under controlled conditions to produce FeSi 45 alloy.
Vacuum Water Atomizing	Convert molten alloy into fine powder through vacuum water atomization for uniform particle characteristics.
Drying	Remove residual moisture to ensure product stability during storage and transportation.
Screening	Classify particles into specified mesh sizes according to customer requirements.
Packaging	Pack under controlled conditions to maintain product cleanliness and prevent contamination.

Quality Control

Raw material chemical verification

Silicon content (Si) analysis

Carbon (C) determination

Sulfur (S) analysis

Phosphorus (P) analysis

Manganese (Mn) analysis

Particle size distribution test

Moisture content inspection

Bulk density measurement

Flowability testing (powder grade)

Visual contamination inspection

Packaging weight verification

Final batch inspection before shipment

Customization Options

Chemical Composition
Si content within 43–47%
Customized impurity limits (C, P, S, Mn)

Particle Size
40 mesh, 50 mesh, 60 mesh
Other customized mesh sizes

Product Form
Atomized powder
Customized particle grading

Packaging & Shipping

Item	Details
Standard Packaging	25 kg bags packed into 1 MT jumbo bag
Pallet	Available upon request
Loading Method	Container loading for export
Shipping Methods	Sea freight, air freight, express courier

FAQ

Q: Can you provide a Certificate of Analysis for each shipment?

A: Yes. Every shipment is supplied with a Certificate of Analysis (COA) showing the actual chemical composition and inspection results.

Q: Do you support OEM and bulk wholesale orders?

A: Yes. We supply OEM orders, private labeling, and bulk quantities for distributors, traders, and industrial manufacturers.

Q: Is a sample available before placing a bulk order?

A: Yes. Sample quantities are available, with customers typically covering the sample and courier costs.

Q: Which payment methods do you accept?

A: We accept T/T for regular orders. Western Union and PayPal are available for sample fees and courier charges.

Q: How should FeSi 45 powder be stored?

A: Store the product in a dry, well-ventilated warehouse, protected from moisture, rain, and direct contact with oxidizing materials.

Q: What after-sales support do you provide?

A: We provide technical documentation, order tracking, quality issue response, and assistance with product specifications and export documentation after delivery.

Hot Tags: fesi 45, China fesi 45 manufacturers, factory, ferro silicon lump, ferrosilicon 72, ferrosilicon 75, ferrosilicon for steel casting, ferrosilicon for steel production, ferrosilicon lump