Silicon Metal 2202 is a premium metallurgical-grade silicon product, defined by its strict impurity control-Fe ≤0.2%, Al ≤0.2%, Ca ≤0.02%. Unlike lower-grade silicon metal(e.g., 2502, 3303), its ultra-low calcium and controlled iron/aluminum content makes it ideal for high-quality metallurgical processes: steel deoxidation, silicon-based ferroalloy production, and non-ferrous alloy refining.

The "2202" in Silicon 2202 is a global impurity grading code, where each digit represents the maximum allowable content (in weight percent) of key impurities:

First "2": Iron (Fe) ≤0.2%
Second "2": Aluminum (Al) ≤0.2%
Third "0": Calcium (Ca) ≤0.02% (critical for metallurgy-calcium reacts with sulfur to form low-melting-point slag that causes casting defects)
Fourth "2": Other trace impurities (e.g., C, P, S) ≤0.2%

This impurity profile solves two major metallurgical pain points:

Avoids brittle inclusions: Low Fe/Al prevents formation of hard Fe-Si-Al phases that reduce steel toughness.
Controls slag volume: Low Ca minimizes excessive slag, which can entrap in molten steel and cause porosity.

Metal Silicon 2202

chemical composition

Parameter	Standard Range	Metallurgical Significance
Main Component	Silicon (Si): ≥99.3%	Ensures strong deoxidation/alloying-lower Si requires higher dosage, increasing cost.
Key Impurities (Max.)	Fe: 0.2%, Al: 0.2%	Prevents brittle Fe-Si-Al inclusions in steel; Al ≤0.2% avoids AlN-induced cracking.
	Ca: 0.02%, C: 0.1%	Ca ≤0.02% reduces low-melting slag; C ≤0.1% avoids carburization in low-carbon steel.
	P: 0.04%, S: 0.02%	P ≤0.04% prevents cold brittleness; S ≤0.02% minimizes hot cracking in castings.
Physical Form	Lumps: 5–50mm	Ideal for steel ladle/ferroalloy furnace feeding (slow, controlled reaction).
Physical Form	Powder: 100–200 Mesh	Used for precision alloying (e.g., electrical steel, aluminum alloys) for uniform dispersion.

Products uses

① Non‑Oriented Electrical‑Steel (Core High‑End Demand)

Use‑case: Transformer‑core & motor‑stator silicon‑steel sheets

Factory‑case: Long‑term supply for domestic electrical‑steel mill; Si2202 effectively suppress hard inclusions; finished‑product magnetic‑loss satisfies high‑grade requirements.

Recommended‑spec: 10‑50 mm lump; typical addition ratio 2.2‑3.2 % of molten‑steel weight.

② High‑End Organosilicon Monomer (Electronic‑Grade Silicone)

Use‑case: Medical‑silicone‑rubber, semiconductor‑packaging sealants

Factory‑case: Cooperated with fine‑chemical‑plant; extends fluidized‑bed continuous‑running‑cycle by 40 % without frequent catalyst‑replacement.

Recommended‑spec: 100‑200 mesh anti‑static fine powder.

③ Photovoltaic Polysilicon Precursor Raw‑Material

Use‑case: Upstream feed‑stock for high‑efficiency P‑type monocrystalline‑silicon wafers

Factory‑case: Supplies new‑energy‑plant; ultra‑low‑Ca reduces cell‑attenuation‑rate.

Recommended‑spec: 200‑mesh fine powder for fluidized pre‑reactor.

④ Aerospace Thin‑Wall Aluminum‑Alloy Castings

Use‑case: Aircraft lightweight structural cast‑parts

Factory‑case: Reduces subcutaneous hard‑inclusion‑cracking, lifts finished‑product yield by 28 %.

Recommended‑spec: 5‑30 mm small‑sized lump.

⑤ High‑Grade Low‑Carbon Structural‑Steel

Deep‑deoxidation & grain‑refining for automobile‑frame & bridge high‑toughness steel; avoids calcium‑induced cold‑brittleness.

Metal Silicon 2202

FAQ

Q1 What is main difference between Si‑2202 and Si‑3303 silicon‑metal?

A Si‑2202 has stricter Ca ≤ 0.02 % versus Si‑3303 Ca ≤ 0.03 %. Choose Si‑2202 for electrical‑steel, electronic grade silicone and high‑efficiency PV‑lines; Si‑3303 works for standard‑organosilicon and conventional solar‑raw‑material.

Q2 Which size of Si‑2202 for organosilicon fluidized‑bed reactor?

A 100‑200 mesh anti‑static fine‑powder, to realize sufficient contact with methyl‑chloride for stable monomer‑yield.

Q3 Can Si‑2202 be used for polysilicon‑production for solar‑cells?

A Yes. Ultra‑low trace‑impurities lower crystal‑defect‑rate, suitable feed‑stock for high‑efficiency photovoltaic‑module‑manufacturers.

Q4 Do you provide test‑samples? What about lead‑time and MOQ?

A Free 0.5‑5 kg test‑samples available. Standard‑stock goods 7‑10 working‑days; customized ultra‑fine‑powder 12‑18 working‑days; MOQ 25 tons full‑container; T/T and L/C payment‑terms supported.

Q5 How to identify unqualified Si‑2202 batches?

A Check MTC report: Ca value higher than 0.02 %, or lumps covered with thick‑oxidation‑crust will trigger inclusion‑defects or catalyst‑poisoning.

Contact us today to request a free sample (1kg) and customized quote-elevate your steel/alloy quality with our metallurgical-grade Metal Silicon 2202!

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