Silicon Metal Powder 200mesh (75μm nominal particle size) is a high-performance additive tailored for metallurgical processes-including steelmaking, ferroalloy production, and non-ferrous alloy refining. Unlike coarse silicon metal lumps or larger-mesh powders (e.g., 100mesh), its 200mesh fineness delivers rapid reaction speed, uniform dispersion, and precise elemental control in molten metal, while its high silicon purity (≥99.5%) minimizes harmful impurities.

Its design prioritizes two critical metallurgical needs:

Rapid reactivity: 200mesh fineness provides a specific surface area of 2.5–3.5 m²/g (3x larger than 100mesh powder), ensuring fast dissolution in molten steel/alloy.
Low impurity risk: Si purity ≥99.5% (Fe ≤0.2%, Al ≤0.2%, Ca ≤0.1%) avoids introducing inclusions that weaken metal strength or cause casting defects.

Silicon metal powder 200mesh

chemical composition

Parameter	Industrial Grade (Metallurgy Basic)	Premium Grade (High-Quality Steel)	Why It Matters for Metallurgy
Silicon (Si) Content	≥99.5%	≥99.8%	Higher Si ensures strong deoxidation/alloying; low Si leads to incomplete oxygen removal.
Harmful Impurities (Max.)	Fe: ≤0.2%, Al: ≤0.2%, Ca: ≤0.1%	Fe: ≤0.1%, Al: ≤0.1%, Ca: ≤0.05%	Fe/Al cause brittle inclusions in steel; Ca reacts with sulfur to form low-melting-point slag.
Carbon (C) Content	≤0.1%	≤0.05%	C avoids carburization in low-carbon steel (e.g., automotive sheet steel, C ≤0.1%).
Size	200mesh (75μm), D10≥50μm, D50=75μm, D90≤100μm	Same as left	Narrow size distribution (PSD) ensures uniform dissolution-prevents local high-Si zones.
Oxide Content (SiO₂)	≤1.0%	≤0.5%	Low SiO₂ reduces slag volume-avoids excessive slag entrapment in steel (causes porosity).

Core Advantages for Metallurgical Processes

Compared to traditional metallurgical silicon additives (e.g., silicon metal lumps, 100mesh powder, ferro silicon), 200mesh silicon metal powder delivers unique benefits:

Advantage	Impact on Metallurgy	Data Support
Faster Dissolution	Reduces deoxidation time in steel ladles-cuts heat loss and energy consumption.	Dissolves 40% faster than 100mesh powder; 150t ladle deoxidation time drops from 8min to 5min.
Uniform Dispersion	Ensures Si is evenly distributed in molten metal-avoids segregation defects.	Si content variation in steel billets reduces from ±0.08% (100mesh) to ±0.03%.
Higher Deoxidation Efficiency	Removes more dissolved oxygen (O) from steel-lowers oxide inclusions.	Reduces steel O content from 80ppm (ferrosilicon) to ≤25ppm (premium grade).
Reduced Impurity Introduction	High purity minimizes harmful elements-improves metal toughness and weldability.	Al-induced inclusions in Q355 steel drop by 35% vs. low-grade silicon powder.

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Key Metallurgical Applications

Steelmaking: Deoxidation & Low-Carbon Steel Alloying

Primary Deoxidation in Ladle Refining

Application: Added during tapping (60–80% through tap) in carbon steel and low-alloy steel production.

Dosage: 0.8–1.5 kg/ton (basic grade) or 1.2–2.0 kg/ton (premium grade).
Process Benefit: Reacts with dissolved O to form SiO₂ slag (easily removed via ladle stirring), avoiding oxide inclusions that cause cracking during rolling.
End Product Impact: Q235 carbon steel produced with 200mesh powder has a tensile strength increase of 10–12% (from 375MPa to 410–420MPa) and elongation improvement of 5–8%.

Low-Carbon Steel Alloying (e.g., Electrical Steel, Automotive IF Steel)

Application: For electrical steel (Si requirement: 3.0–3.5%), use premium grade 200mesh powder (Si ≥99.8%) to avoid impurity-induced magnetic loss. Dosage: 2.5–3.5 kg/ton.
Result: Silicon distribution uniformity reaches 97% (vs. 90% with ferrosilicon), reducing electrical steel core loss by 15% (from 1.3 W/kg to 1.1 W/kg at 50Hz).

Ferroalloy Production: High-Purity Silicon-Based Alloys

Silicon Manganese Alloy (SiMn)

Application: Replaces coarse silicon lumps as a silicon source in SiMn smelting. 200mesh powder's fast reaction reduces coke consumption.

Silicon Chromium Alloy (SiCr)

Application: Used in stainless steel production to adjust Si content. 200mesh powder ensures SiCr alloy has low C content (≤0.05%), critical for 304 stainless steel.
Quality Impact: 304 stainless steel made with 200mesh-derived SiCr has corrosion resistance improvement of 20% (tested in 5% NaCl solution).

Non-Ferrous Metallurgy: Aluminum & Magnesium Alloy Refining

Aluminum Alloy

Application: Added as a grain refiner and deoxidizer. 200mesh powder dissolves evenly in molten aluminum, avoiding coarse grains.
Mechanical Improvement: 6061 aluminum alloy tensile strength increases from 310MPa to 335MPa, and fatigue life extends by 25%.

Magnesium Alloy

Application: Reduces oxygen and iron content in magnesium alloys (Fe ≤0.005% for AZ31B). Dosage: 0.3–0.5 kg/ton.
Corrosion Resistance: AZ31B magnesium alloy corrosion rate drops from 0.8 mm/year to 0.5 mm/year (salt spray test).

Contact us today to request a free sample (500g) and customized quote-elevate your steel/alloy quality with our metallurgical-grade Silicon Metal Powder 200mesh!

Silicon Metal Powder 200mesh