Silicon Metal 441 Lump Manufacturer

Silicon Metal 441 is the standard grade for premium aluminium alloys: Si ≥99.0% with calcium held below 0.1%, which markedly reduces calcium inclusions in the melt and the porosity or inclusion defects in die castings. Aimed at automotive wheel, thin-wall die casting and high-end extrusion customers, our 441 lumps are traceable by heat number and produced to your agreed size ratio, fitting long-term procurement with strict batch-consistency requirements.

Note: Si is a guaranteed minimum; Fe / Al / Ca / P / S are guaranteed maximums. Production follows GB/T 2881 and can be cross-checked against ASTM A1005 and ISO 5449. Special compositions outside the table can be produced to your internal specification. "Typical" values are recent batch averages; the Mill Test Certificate of each shipment prevails.

10-100mm:Standard charging size for aluminium alloy plants.

10-50mm:Fast melting for small and medium holding furnaces.

50-100mm:Large furnaces, slower release and lower oxidation loss.

3-10mm:Late refining addition and wire-feed charging.

Customized:Prodeuced to your ration and sieve curve.

1.Low calcium: Ca ≤0.1% reduces calcium inclusions, lowering porosity and scrap rates in die castings.
2.Batch consistency: heat-by-heat spectrometer testing keeps Si and impurity variation well below industry average.
3.Size as agreed: the size ratio is written into the contract, so material goes straight into the furnace without re-crushing.
4.Fast response: stocked grades ship in 7–10 days; urgent top-ups can move by direct trucking.
5.Technical support: we help calculate addition rates and melting practice to shorten your trial cycle.

 

 

Packing: 1,000 kg jumbo bags with moisture-proof inner liner, or 25 kg small bags on pallets. Powder grades are packed in valve bags with stretch-wrapped pallets to prevent moisture uptake in transit.

 

 

Container loading: 20–25 MT per 20′FCL in jumbo bags. Bags are sealed and photographed, and the full loading process is video-recorded for buyer verification.

 

Delivery: 7–10 days for standard specifications, 15–20 days for customized sizes. FOB Tianjin / Qingdao; CFR and CIF to your nominated port available.

 

Certification: ISO 9001 quality management system; pre-shipment inspection by SGS, BV or Intertek available on request.

1.Anyang Mingrui Silicon Industry Co., Ltd. is located in Anyang, Henan, with convenient access to Tianjin and Qingdao ports, keeping inland logistics costs under control.
2.Monthly supply capacity is around 2,500 MT with over 1,200 MT kept in regular stock, supporting 20–25 MT (1×20′FCL) full-container orders and long-term annual framework contracts.
3.Certified to ISO 9001. Equipped with an optical emission spectrometer and in-house chemical laboratory, we run a three-stage inspection: sampling at furnace, re-check after casting, and final check before shipment. Samples of every batch are retained for 6 months for traceability.

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